Alfa Laval Valve Automations: Indication Unit, IndiTop, ThinkTop, ThinkTop Basic, ThinkTop D30, GreenTop

DescriptionFeaturesHow It WorksSMP-BCSMP-BCADocumentation

Alfa Laval SMP Mixproof Valve

Alfa Laval’s SMP Mixproof Valve is  ideal for handling sanitary process flows through matrix piping systems, SMP mixproof valves are standardized, cost-effective alternatives to Unique mixproof valves.

Related Industries:

Processed Foods, Dairy, Beverages, Brewery, Home & Personal Care

Models

  • SMP-BC mixproof valve
  • SMP-BCA  aseptic mixproof valve

 

Economic mixproof valves

Alfa Laval offers two double-seal mixproof valves: The Alfa Laval SMP-BC and the aseptic version, SPC-BCA. The SMP valves enable the flow of two different media through the same valve simultaneously without any risk of cross-contamination. This increases operating efficiencies and significantly reduces operating costs.

High application flexibility

Based on a modular structure, SMP mixproof valves have several valve bodies and components that can be combined in various ways. These self-draining mixproof valves can, for instance, be configured as stop valves and changeover valves.

Plus SMP mixproof valves are constructed from a series of base components, which enables valves to easily be configured to meet different requirements in sanitary and aseptic applications.

Simplified valve maintenance

Few moving parts, a top-loaded plug, a maintenance-friendly actuator make SMP mixproof valves easy to disassemble for quick, straightforward maintenance.

SMP mixproof valve range

The Alfa Laval SMP mixproof valve range offers two standard cost-effective alternatives to the premium Alfa Laval Unique mixproof valve range.

  • SMP-BC mixproof valve for applications that require additional safety, leak detection and CIP
  • SMP-BCA mixproof valve for aseptic applications

Aseptic version

The aseptic version of Alfa Laval’s SMP mixproof valve is called SMP-BCA, which is designed for use under mixproof aseptic conditions and sterilization involving high temperatures.

The straight forward design keeps liquids separate by using two seals on the same plug, with a leakage chamber in between.

The PTFE / rubber diaphragm following the movement of the plug in the upper section of the valve body ensures that there is no increase in the concentration of microorganisms in the product during processing.

Compliance with most hygienic standards

Alfa Laval SMP valves meet most standards requested in the dairy, food and beverage, and personal care industries

Construction

The construction of the Alfa Laval SMP mixproof valve range varies, depending on the valve model (SMP-BC and SMP-BCA).

The SMP-BC mixproof valve consists of an actuator, bonnet, plug and valve bodies. Three versions are available: a shut-off valve with one valve body, a shut-off valve with two valve bodies, and a changeover valve with three valve bodies. Clamp rings and a plug clip system secure the valve bodies to the actuator. The clamp ring enables you to turn the valve in any direction.

The SMP-BCA mixproof valve consists of the same valve components as the SMP-BC, but is fitted with a PTFE/EPDM diaphragm designed to prevent contamination from external sources and to withstand high temperature. This makes the SMP-BCA ideal for use under aseptic conditions.

                         

     SMP-BC shut-off valve                                     SMP-BCA Aseptic shut-off valve

Operating principles

The Alfa Laval SMP mixproof valves are controlled from remote location by means of compressed air. The SMP-BC and SMP-BCA mixproof valves have different operating principles, which are described below.

SMP-BC mixproof valve

The SMP-BC mixproof valve is fitted with two small pneumatic normally open (NO) valves, a detecting valve and a CIP-valve.

The valve plug has two seals, which form an atmospheric leakage chamber. Any product leakage is discharged through the detecting valve. The leakage chamber may be cleaned by supplying CIP into the detecting valve. The SMP-BC is insensitive to water hammer in the product line above the plug.

For changeover valves, a single seal plug separates the lower product lines.

SMP-BC mixproof valve

  • Fittings in accordance with required standard
  • Valve sensing and control devices, including ThinkTop, ThinkTop Basic and IndiTop
  • Actuator with strong spring
  • Larger actuator for valve sizes 38-51 mm/DN 40-50
  • CIP installation kits
  • Various valve body combinations
  • Surface roughness, product wetted parts: Ra ≤ 0.8 µm
  • Product wetted seals of NBR or FPM
  • Service tool for actuator
  • Tool for plug seals (Necessary for changing the seals)

SMP-BCA aseptic mixproof valve

The SMP-BCA aseptic mixproof valve is a normally closed (NC) valve with a proven PTFE/EPDM diaphragm. The special designed aseptic diaphragm hermetically seals against intrusion from the atmosphere and ensures full protection against the effects of microorganisms. It also prevents product build-up on the product contact surface.

The valve plug has two seals, which form an atmospheric leakage chamber. Any product leakage is discharged through the detecting valve. The leakage chamber may be cleaned by supplying CIP into the detecting valve.

Two small pneumatic normally open (NO) valves enable a sterile barrier to be established in the leakage chamber through the continuous application of steam. The chamber must be clean and sterile when the main valve is closed.

For changeover valves, a single seal plug separates the lower product lines but does not require the use of a sterile barrier in the leakage chamber.

SMP-BCA mixproof valve

  • Fittings in accordance with required standard
  • Valve sensing and control devices, including ThinkTop, ThinkTop Basic and IndiTop
  • Larger actuator for valve sizes 38-51 mm/DN 40-50
  • CIP installation kits
  • Various valve body combinations
  • Surface roughness, product wetted parts: Ra ≤ 0.8 µm
  • Product wetted seals of NBR and PTFE or FPM and PTFE
  • Service tool for actuator
  • Tool for plug seals (Necessary for changing the seals)

Unique Mixproof Valve

Unique mixproof valves enable the simultaneous flow of two different products or fluids through the same valve without risk of cross-contamination. This enhances plant flexibility and efficiency of the dairy, food and beverage, and biopharm industries.

FeaturesValve RangeHow It WorksDocumentation

Cost effective mixproof valve

Alfa Laval Unique mixproof valves feature two independent plugs, which means that a single Unique mixproof valve can often replace two or more valves of other types.

Exceptional spillage-free operation

A state-of-the-art double-seat design provides long-lasting, spillage-free operation thus minimizing the risk of product contamination. The use of double lip seals provides added protection to ensure safe and hygienic operation.

Easy valve to maintain and clean

Unique mixproof valves feature a top-loaded design, making maintenance fast and easy. It also features no adjustable components, a maintenance-friendly actuator and built-in leakage detection on all seals. Unique mixproof valves meet most hygienic standards and can be supplied with the optional SpiralClean cleaning system.

Unique Mixproof valve range

The Alfa Laval Unique mixproof valve concept provides modular solutions that you can easily tailor to your specific requirements. This means you only pay for the exact features and capabilities you really need. To make selection easier, a series of standard configurations is available:

Unique Basic has the basic components that provide significant safety and leakage detection. It features an actuator without seat lift and unbalanced plugs.

 

Unique SeatClean is the choice for standard installations that handle products with solids. Seat lift during normal cleaning procedures cleans the plugs and seats. A balanced lower plug eliminates the risk of mixing products by pressure shock or when the pressure in the pipe is high.

 

Unique HighClean meets your processing needs when dealing with sticky products. SpiralClean ensures thorough cleaning of the spindles, upper and lower plugs and in the leakage chamber. With balanced upper and lower plug, the configuration of this valve protects against the effects of high pressure and water hammer.

 

Unique UltraClean meets the highest demands for hygienic processing of sticky products, products with high content of solids, or applications that require close-to-aseptic conditions. It features an actuator with integrated seat lift, balanced upper and lower plugs and SpiralClean.

Unique Mixproof Tank Outlet is the choice for standard tank installations. Seat lift during normal cleaning procedures cleans the plugs and seats. A balanced plug protects against water hammer when closing in the direction of product flow.

 

Unique Mixproof Horizontal Tank Outlet Valve specially designed for horizontal mounting directly on the tank wall. It improves cleanliness of the horizontal tank connections and ensures that no area of the tank inlet or tank outlet is left uncleaned. The valve insures 100% drainability of the tank and for the 4” and 6” it offers the ability to handle particles up to 45 mm.

 

Unique Mixproof Large Particle Valve. For applications with very large particles or highly viscous fluids, this valve offers the same basic advantages as Unique mixproof valves but are specially designed with large openings up to 45 mm in diameter.

You get the full benefit of using Unique mixproof valves by combining them with Alfa Laval ThinkTop and ThinkTop Basic valve sensing and control units.

Valve clusters – customized flow solutions

We are specialists in providing pre-built valve clusters customized to meet specific, individual requirements.
Our expertise helps ensure you the most efficient flow management, using as few components as possible and dealing effectively with key issues that include thermal cycling, cleanability, drainability and flow control.
Alfa Laval valve clusters can be supplied pre-assembled and pre-tested as well as fully wired and with all the necessary pneumatic tubing, junction boxes and control panels pre-connected.
This means you can bring even complex installations online as quickly as possible, saving time and avoiding lost revenue associated with on-site troubleshooting and downtime.

Construction

The Unique mixproof valve concept is based on a series of base components, including valve body, valve plug, actuator and cleaning options and accessories that support a wide range of applications. Using these components, you can build a Unique mixproof valve to match your exact process requirements.

To facilitate maintenance, the Unique mixproof valve also features leakage detection holes that provide advance notification of wear or damage to static o-rings. Operators can visually inspect the valve at any time without having to disassemble it.

Operating principle

The Alfa Laval Unique mixproof valve is a normally closed (NC) valve that is controlled from a remote location by means of compressed air.

To separate the two liquids, the valve has two independent plug seals. The space between the two seals forms an atmospheric leakage chamber. In the rare case of accidental product leakage, the product flows into the leakage chamber and is discharged through the leakage outlet.

When the valve is open, the leakage chamber is closed. The product can then flow from one line to the other without spillage. The valve can easily be cleaned and protected against the effects of water hammer according to the specific requirements of the process and the configuration of the valve. (There is no product spillage during valve operation).

Unique mixproof valve - How it works

SpiralClean system

To ensure the hygienic operating condition of its Unique mixproof valve range, Alfa Laval offers its SpiralClean system to clean the upper and lower balanced plugs and leakage chamber of the valves. Using less cleaning fluid, utilities and time, SpiralClean cleans more thoroughly and efficiently than conventional cleaning devices. All external CIP systems for Unique mixproof valves include the SpiralClean design as standard.

Another big benefit: SpiralClean enables the Unique mixproof valve to operate under aseptic-like conditions, creating a steam barrier to the atmosphere upon applying steam to the CIP pipes.

Unique Mixproof Horizontal Tank Valve

The Unique Mixproof HT valve provides a state of the art solution when there is no CIP pressure or flow from the tank side to clean the seat and plug. The valve is self-cleaning, thanks to two Cleaning-in-Place (CIP) nozzles. The first nozzle is designed specifically for plug cleaning. This double-acting nozzle projects cleaning solution through the tank connection, ensuring complete cleaning of the seat contact surfaces as well as the shadow area of the tank port.

The second is a rotating CIP nozzle incorporated into the unit for optimum cleaning of the full-bore leakage chamber. The design of the single valve body makes it suitable to weld directly on the tank or to connect it via a Tri-clamp.

The 4” and 6” models feature a 45-mm opening, which enables the passage of very large particles or efficient handling of high viscosity fluids.

Unique Mixproof Large Particle Valve

Unique Mixproof LP is remote-controlled by means of compressed air. The valve is a normally closed (NC) valve. It is as standard supplied seat lift, which enables handling of two different products at the same time, or safe handling of one product while seat-lift cleaning operations are being conducted in the other portion of the valve – all without any risk of cross-contamination.

The 6” valve is as standard also equipped with balanced lower plug to protect against the effects of high pressure and water hammer. The 4” valve is, in order to accommodate 1½” (45mm) particles, not supplied with balanced lower plug. The 4” is however as standard equipped with a boost actuator to accommodate a product pressure of up to 10 bar.

Options

  • 3-A version available upon request
  • Product wetted seals HNBR, NBR or FPM
  • Male parts or clamp liners in accordance with required standard
  • Control and indication: ThinkTop or ThinkTop Basic
  • Side indication for detection of upper seat lift
DescriptionFeaturesDetailsDocumentation

UNIQUE BASIC MIXPROOF VALVE

The Alfa Laval Basic mixproof valve is a lower cost solution that still provides the safety, separation, and leakage detection needed in a mixproof valve design. It is a normally closed (NC) valve that is controlled from a remote location by means of compressed air. Two independent plug seals separate the two liquids, and the space between the two seals forms an atmospheric chamber. When the valve is open the chamber is closed, allowing the product to flow from one line to the other without spillage.

All Unique mixproof valves are equipped with Alfa Laval ThinkTop valve sensing and control devices, which fulfill regulatory requirements for detection of seat lift and feedback signal.

Related Industries:

Processed Foods, Dairy, Beverages, Home & Personal Care

 

Cost effective mixproof valve

Alfa Laval Unique mixproof valves feature two independent plugs, which means that a single Unique mixproof valve can often replace two or more valves of other types.

Exceptional spillage-free operation

A state-of-the-art double-seat design provides long-lasting, spillage-free operation thus minimizing the risk of product contamination. The use of double lip seals provides added protection to ensure safe and hygienic operation.

Easy valve to maintain and clean

Unique mixproof valves feature a top-loaded design, making maintenance fast and easy. It also features no adjustable components, a maintenance-friendly actuator and built-in leakage detection on all seals. Unique mixproof valves meet most hygienic standards and can be supplied with the optional SpiralClean cleaning system.

Valve clusters – customized flow solutions

We are specialists in providing pre-built valve clusters customized to meet specific, individual requirements.
Our expertise helps ensure you the most efficient flow management, using as few components as possible and dealing effectively with key issues that include thermal cycling, cleanability, drainability and flow control.
Alfa Laval valve clusters can be supplied pre-assembled and pre-tested as well as fully wired and with all the necessary pneumatic tubing, junction boxes and control panels pre-connected.
This means you can bring even complex installations online as quickly as possible, saving time and avoiding lost revenue associated with on-site troubleshooting and downtime.

For more information, please refer to Documentation and to the Selection Guide.

For cost-effective alternatives to the Unique mixproof valve range, Alfa Laval also offers standard SMP mixproof valves

 

CONCEPT

The exceptional concept of this mixproof valve is characterized by unmatched flexibility, while maintaining simplicity. The reliable, modular design meets individual needs for all mixproof operations with two different products flowing through one valve.

The unique quality of this mixproof valve is the system of combining specific features and functions from a great variety of options offered. It is exceptional in the world of mixproof valves, yet requires minimal service and maintenance.

WORKING PRINCIPLE

Unique is remote-controlled by means of compressed air. The valve is a NC valve.

The valve has two independent plug seals forming a leakage chamber between them under atmospheric pressure during every working condition. In case of rare accidental leaking of product, this will flow into the leakage chamber and be discharged through the leakage outlet. When the valve is open, the leakage chamber is closed. The product can then flow from one line to the other.

The valve can be cleaned and water hammer protected to any level, according to the needs in the specific process. There is virtually no spillage of product when operating the valve.

APPLICATION

Unique Basic has the basic components for low cost and clean-in-place (CIP) solutions, providing significant safety and leakage detection:

  • Actuator without seat lift
  • Unbalanced plugs
  • No SpiralClean of leakage chamber or plugs

Typical applications could be water inlet for water push of product or CIP supply and return lines. Not suitable in application with risk of pressure shocks or sticky products. Unique Basic mixproof valve is for low-cost solutions.

SPIRALCLEAN

The Unique concept offers the Alfa Laval SpiralClean system to clean the upper and lower balanced plugs and leakage chamber, helping to meet the high hygienic standards of the sanitary flow industry. The system cleans more efficiently, using less cleaning fluid by ensuring that a directional flow of CIP fluid reaches all the surfaces in less time than with conventional systems. All external CIP systems for Unique include the SpiralClean design as standard. The SpiralClean system allows the Unique mixproof valve to run under aseptic-like conditions. If you apply steam to the CIP pipes, this will form a steam barrier to the atmosphere.

MATERIALS
Product Wetted Steel Parts 316L
Other Steel Parts 304
Product Wetted Seals EPDM, HNBR, NBR, or FPM
Other Seals CIP seals: EPDM
Actuator seals: NBR
Finish Options Internal/external matte (blasted) Ra<64µ”
Internal bright (polished) Ra<32µ”
Internal/external bright (internal polished) Ra<32µ”

Note: The Ra values are only for the internal surface.

TECHNICAL DATA
Product Pressure (max) 140 psi (For a higher pressure, please ask CSI.)
Product Pressure (min) Full vacuum
Temperature Range 23°F – +257°F, depending on seal material (For a higher temperature, please ask CSI.)
Air Pressure 116 psi
DIMENSIONAL DATA
Size OD(in) OD(in) OD(in) OD(in) OD(in)
ISO 1.5 2.0 2.5 3.0 4.0
*A Basic Clean 20.882 22.655 27.541 27.541 35.027
*A Seat Clean 20.882 22.655 26.398 26.398 31.165
*A High Clean/UltraClean 24.073 25.846 29.944 29.944 36.327
B 6.698 8.668 8.668 8.668 11.820
**C 2.396 2.908 3.400 3.897 4.870
OD 1.497 2.009 2.502 2.998 4.003
ID 1.371 1.883 2.376 2.872 3.845
t 0.063 0.063 0.063 0.063 0.079
E Basic/Seat Clean 3.940 4.767 5.871 5.595 6.974
E High Clean/Ultra Clean 5.674 6.501 7.880 7.604 9.771
F1 1.241 1.241 1.497 1.497 2.325
F2 0.197 0.197 0.197 0.197 0.197
øD Basic 4.728 4.728 7.328 7.328 7.328
øD Seat Clean, High Clean, and Ultra Clean 4.728 4.728 6.186 6.186 7.328
L Basic 9.062 9.062 11.071 11.071 14.933
L Seat Clean, High Clean, and Ultra Clean 9.062 9.062 9.929 9.929 11.071
M/Tri-Clamp® 0.827 0.827 0.827 0.827 0.827
Weight (lb) Basic 30.0 33.0 53.0 53.0 75.0
Weight (lb) SeatClean 30.0 33.0 53.0 53.0 75.0
Weight (lb) High-/UltraClean 32.0 35.0 59.0 59.0 84.0

Notes: *For the A-measure, if different upper/lower body sizes, contact Central States Industrial.

**The measure C can always be calculated by the formula C = ½ ID upper + ½ ID lower + 26 mm.

OPTIONS

The concept of Unique centers around the customer’s needs and provides modern tailor-made solutions, which are secured for the future. Only Alfa Laval offers the possibility of not choosing unnecessary features and functions, thus avoiding problems caused by a non-adapted product. The Unique mixproof valve is designed with user flexibility in mind. The customer can choose additional options as required individually; for example higher hygiene demands or higher resistance against physically tough conditions.

UNIQUE ULTRACLEAN

Unique UltraClean meets the highest demands for hygienic processing. It has:

  • Actuator with seat lift integrated
  • Balanced lower and upper plug
  • SpiralClean of leakage chamber, upper, and lower plug

During the cleaning process, the plugs are lifted independently to ensure cleaning of plugs and seats together with their corresponding pipe. At the same time or separately the leakage chamber and balanced plugs are cleaned with our SpiralClean system. The Unique UltraClean also protects against high pressure and water hammer effect. It has few product wetted seals and allows no product spillage during operation. The Unique UltraClean mixproof valve is the choice for solutions requiring the highest level of hygiene. The UltraClean is suitable for applications with sticky products, products with high content of solids or applications where “close to aseptic conditions” is wanted.

UNIQUE HIGHCLEAN

Unique HighClean is sure to meet your processing needs when dealing with sticky products or if no recontamination can be accepted at all, as the valve can be provided with SpiralClean both around spindles and in leakage chamber. The valve is characterized by:

  • Actuator without seat lift integrated
  • Balanced lower and upper plug
  • SpiralClean of leakage chamber, as well as of upper and lower plug

With balanced plugs, the configuration of this valve protects against high pressure and water hammer effect.

UNIQUE SEATCLEAN

Unique SeatClean meets the typical demands of a process valve in the food and drink industry. It is also suitable for products with solids. Cleaning of the plugs and seats are performed by means of seatlift during normal cleaning procedure. This valve also includes a balanced lower plug that eliminates the risk of mixing products by pressure shock or when the pressure in the pipe is high. Its features are:

  • Actuator with seat lift integrated
  • Balanced lower plug, unbalanced upper plug
  • No SpiralClean of leakage chamber or plugs

Unique SeatClean is the choice for standard solutions.

DescriptionFeaturesHow It WorksDocumentation

Unique Mixproof Large Particle

For applications with very large particles or highly viscous fluids, this valve offers the same basic advantages as Unique mixproof valves but are specially designed with large openings up to 45 mm in diameter.

Related Industries:

Agriculture Processing, Food Processing, Beverage Processing, Dairy Processing

Cost effective mixproof valve

Alfa Laval Unique mixproof valves feature two independent plugs, which means that a single Unique mixproof valve can often replace two or more valves of other types.

Exceptional spillage-free operation

A state-of-the-art double-seat design provides long-lasting, spillage-free operation thus minimizing the risk of product contamination. The use of double lip seals provides added protection to ensure safe and hygienic operation.

Easy valve to maintain and clean

Unique mixproof valves feature a top-loaded design, making maintenance fast and easy. It also features no adjustable components, a maintenance-friendly actuator and built-in leakage detection on all seals. Unique mixproof valves meet most hygienic standards and can be supplied with the optional SpiralClean cleaning system.

Valve clusters – customized flow solutions

We are specialists in providing pre-built valve clusters customized to meet specific, individual requirements.
Our expertise helps ensure you the most efficient flow management, using as few components as possible and dealing effectively with key issues that include thermal cycling, cleanability, drainability and flow control.
Alfa Laval valve clusters can be supplied pre-assembled and pre-tested as well as fully wired and with all the necessary pneumatic tubing, junction boxes and control panels pre-connected.
This means you can bring even complex installations online as quickly as possible, saving time and avoiding lost revenue associated with on-site troubleshooting and downtime.

For more information, please refer to Documentation and to the Selection Guide (below).

For cost-effective alternatives to the Unique mixproof valve range, Alfa Laval also offers standard SMP mixproof valves.

Construction

The unique mixproof valve concept is based on a series of base components, including valve body, valve plug, actuator and cleaning options and accessories that support a wide range of applications. Using these components, you can build a Unique mixproof valve to match your exact process requirements.

To facilitate maintenance, the Unique mixproof valve also features leakage detection holes that provide advance notification of wear or damage to static o-rings. Operators can visually inspect the valve at any time without having to disassemble it.

Operating principle

The Alfa Laval Unique mixproof valve is a normally closed (NC) valve that is controlled from a remote location by means of compressed air.

To separate the two liquids, the valve has two independent plug seals. The space between the two seals forms an atmospheric leakage chamber. In the rare case of accidental product leakage, the product flows into the leakage chamber and is discharged through the leakage outlet.

When the valve is open, the leakage chamber is closed. The product can then flow from one line to the other without spillage. The valve can easily be cleaned and protected against the effects of water hammer according to the specific requirements of the process and the configuration of the valve. (There is no product spillage during valve operation).

Unique mixproof valve - How it works

Unique mixproof spiral clean.jpg

SpiralClean system

To ensure the hygienic operating condition of its Unique mixproof valve range, Alfa Laval offers its SpiralClean system to clean the upper and lower balanced plugs and leakage chamber of the valves. Using less cleaning fluid, utilities and time, SpiralClean cleans more thoroughly and efficiently than conventional cleaning devices. All external CIP systems for Unique mixproof valves include the SpiralClean design as standard.

Another big benefit: SpiralClean enables the Unique mixproof valve to operate under aseptic-like conditions, creating a steam barrier to the atmosphere upon applying steam to the CIP pipes.

Options

    • 3-A version available upon request
    • Product wetted seals HNBR, NBR or FPM
    • Male parts or clamp liners in accordance with required standard
    • Control and indication: ThinkTop or ThinkTop Basic
    • Side indication for detection of upper seat lift
DescriptionFeaturesHow It WorksDetailsDocumentation

Unique Tank Outlet MixProof  Valve

The Unique tank outlet mixproof valve features the same advantages as the Unique mixproof valve, but is specially designed for mounting directly on the tank wall at tank inlets and outlets. For tank inlet and outlet applications, the Unique tank outlet (TO) mixproof valve offers full drainability and provides cleanability all the way up to the tank without any risk of cross-contamination.

Related Industries:

Processed Foods, Dairy, Beverages, Home & Personal Care

Cost effective tank outlet mixproof valve

Alfa Laval Unique Mixproof TO valves feature two independent plugs. It is the choice for hygienic installations enabling safe filling or emptying of tanks.

Exceptional spillage-free operation

A state-of-the-art double-seat design provides long-lasting, spillage-free operation thus minimizing the risk of product contamination. The use of double lip seals provides added protection to ensure safe and hygienic operation.

Easy valve to maintain and clean

Unique mixproof valves feature a top-loaded design, making maintenance fast and easy. It also features no adjustable components, a maintenance-friendly actuator and built-in leakage detection on all seals. Unique mixproof valves meet most hygienic standards and can be supplied with the optional SpiralClean cleaning system.

Valve clusters – customized flow solutions

We are specialists in providing pre-built valve clusters customized to meet specific, individual requirements.
Our expertise helps ensure you the most efficient flow management, using as few components as possible and dealing effectively with key issues that include thermal cycling, cleanability, drainability and flow control.
Alfa Laval valve clusters can be supplied pre-assembled and pre-tested as well as fully wired and with all the necessary pneumatic tubing, junction boxes and control panels pre-connected.
This means you can bring even complex installations online as quickly as possible, saving time and avoiding lost revenue associated with on-site troubleshooting and downtime.

For more information, please refer to Documentation and to the Selection Guide.

For cost-effective alternatives to the Unique mixproof valve range, Alfa Laval also offers standard SMP mixproof valves.

Construction

The unique mixproof valve concept is based on a series of base components, including valve body, valve plug, actuator and cleaning options and accessories that support a wide range of applications. Using these components, you can build a Unique mixproof valve to match your exact process requirements.

To facilitate maintenance, the Unique mixproof valve also features leakage detection holes that provide advance notification of wear or damage to static o-rings. Operators can visually inspect the valve at any time without having to disassemble it.

Operating principle

The Alfa Laval Unique mixproof valve is a normally closed (NC) valve that is controlled from a remote location by means of compressed air.

To separate the two liquids, the valve has two independent plug seals. The space between the two seals forms an atmospheric leakage chamber. In the rare case of accidental product leakage, the product flows into the leakage chamber and is discharged through the leakage outlet.

When the valve is open, the leakage chamber is closed. The product can then flow from one line to the other without spillage. The valve can easily be cleaned and protected against the effects of water hammer according to the specific requirements of the process and the configuration of the valve. (There is no product spillage during valve operation).

Unique mixproof valve - How it works

Unique mixproof spiral clean.jpg

SpiralClean system

To ensure the hygienic operating condition of its Unique mixproof valve range, Alfa Laval offers its SpiralClean system to clean the upper and lower balanced plugs and leakage chamber of the valves. Using less cleaning fluid, utilities and time, SpiralClean cleans more thoroughly and efficiently than conventional cleaning devices. All external CIP systems for Unique mixproof valves include the SpiralClean design as standard.

Another big benefit: SpiralClean enables the Unique mixproof valve to operate under aseptic-like conditions, creating a steam barrier to the atmosphere upon applying steam to the CIP pipes.

Options

    • 3-A version available upon request
    • Product wetted seals HNBR, NBR or FPM
    • Male parts or clamp liners in accordance with required standard
    • Control and indication: ThinkTop or ThinkTop Basic
    • Side indication for detection of upper seat lift
CONCEPT

Unmatched flexibility is the concept of this simple mixproof valve. Its modular design provides the perfect solution for all mixproof tank outlet applications involving non-compatible fluids within the pipeline and tank. The body and outlet can be easily positioned by the loosening of a single clamp. The body is connected to a flange that is welded directly to the tank.

The tank flange maintains TÜV approval AD 2000 and comes with an EN10204 (3.1) inspection certificate 3.1. The Unique TO is available in two inch to four inch outlet (ISO tube) sizes. The design of the valve allows it to be installed in a horizontal configuration.

WORKING PRINCIPLE

The Unique TO is remotely controlled by means of compressed air. The valve is supplied in a normally-closed (NC) configuration. The valve maintains two independent plug seals, forming a leakage chamber which is open to the atmosphere at all times. In the unlikely event of a leak, product will enter into the leakage chamber and be discharged through a leakage chamber outlet. As the valve opens, the leakage chamber closes allowing product to flow from the tank to the pipeline. The valve is protected from any pipeline water hammer thanks to a balanced plug design that limits the speed of the seating of valve plug when closing with the direction of the product flow. The valve has multiple cleaning options, configurable to the needs of the specific application. There is practically no spillage of product when operating the valve.

APPLICATION

Unique TO meets the typical demands of a process valve in the sanitary industry. It is also suitable for products with solids. Cleaning of the plugs and seats are performed by means of seat lift during normal cleaning procedure. This valve also includes a balanced plug in the pipeline that protect against pressure shock in the pipeline when closing in the direction of product flow. Features include an actuator with balanced seat lift integrated and standard balanced plug in pipeline. Unique TO is the choice for standard solutions.

  1. Unique TO
  2. Unique TO long stroke (size 2.5 inch to 3 inch ISO63.5-ISO76.1 and DN65-DN80)
  3. Unique TO with external cleaning

Unique TO with external cleaning meets the highest demands for hygienic processing. During the cleaning process, the plugs can be lifted independently to ensure cleaning of plugs and seats together with their corresponding pipe. At the same time or separately the leakage chamber and balanced plugs can be cleaned with our SpiralClean system. It has few product wetted seals and allows no product spillage during operation. This valve is the choice for solutions requiring the highest level of hygiene and is suitable for applications with sticky products, products with high content of solids or applications where “close to aseptic conditions” are wanted. Its features include an actuator with seat lift integrated and SpiralClean of leakage chamber and balanced plug. Unique TO with external cleaning is the choice for highest hygienic cleaning.

 

 

MATERIALS
Product Wetted Steel Parts 316L
Other Steel Parts 304
Product Wetted Seals EPDM, HNBR, NBR, or FPM
Other Seals CIP seals: EPDM
Actuator seals: NBR
Finish Options Internal/external matte (blasted) Ra<64µ”
Internal bright (polished) Ra<32µ”
Internal/external bright (internal polished) Ra<32µ”

Note: The Ra values are only for the internal surface.

TECHNICAL DATA
Product Pressure in Pipeline (max) 10 bar / 145 psi (1000 kPa)
(For higher pressure, call Central States Industrial (CSI) at 800.654.5635)
Product Pressure (min) Full vacuum
Temperature Range 23°F – +257°F (depending on seal material)
(For higher temperature, call Central States Industrial (CSI) at 800.654.5635)
Air Pressure Max. 8 bar /116 psi (800 kPa)
SPIRALCLEAN

The Unique TO offers the Alfa Laval SpiralClean system to clean the balanced plug and leakage chamber, helping to meet the high hygienic standards of the sanitary industry. All external clean-in-place (CIP) systems for Unique include the SpiralClean design as standard. Another benefit of the SpiralClean system is that it allows the Unique TO to operate under near-aseptic conditions by applying steam to the CIP pipes, thereby forming a steam barrier to the atmosphere.

OPTIONS

The Unique TO is designed with user flexibility in mind. The user can choose additional options as warranted by the application (i.e. stricter hygienic requirements, challenging downstream flow characteristics). The modular design of Unique TO uses common components from the Unique valve family, reducing the requirement for spare parts inventory while providing an extremely serviceable valve. The valve design consists of a single valve body, connected to either a tank flange or a stub flange via a clamp.

The drawings below give an overview of all options when choosing the valve to fit your process, thus demonstrating the actual flexibility of the Unique Mixproof tank outlet valve. The Unique TO concept offers balanced plug in pipe line, seat lift, CIP for the plugs and leakage chambers and any combination in between.

UNIQUE TO SIZE FLEXIBILITY
  1. 2″ – ISO51 and DN50 with size 3-Basic actuator
  2. 2½”-3″ – ISO63.5-ISO76.1 and DN65-DN80 with size 4-Basic actuator
  3. 2½”-3″ – ISO63.5-ISO76.1 and DN65-DN80 with size 5-Basic actuator
  4. 4″ – ISO101.6, DN100, DN125 and DN150 with size 5-Basic actuator
  5. 4″ – ISO101.6, DN100, DN125 and DN150 with size 4-Basic actuator (eg. tank filling valve)
UNIQUE TO HYGIENIC FLEXIBILITY

  1. CIP in leakage chamber by use of spiral clean
  2. With external CIP cleaning in sealing element by use of spiral clean
  3. With external CIP cleaning in sealing element and CIP in leakage chamber by use of spiral clean
OTHER OPTIONS

For control and indication of both upper and lower seat lift as well as main movement, please call Central States Industrial (CSI) at 800.654.5635.

3-A Sanitary Standard labeling is available on request.

DescriptionFeaturesHow It WorksDocumentation

Unique Mixproof Horizontal Tank

Unique Mixproof Horizontal Tank Valve specially designed for horizontal mounting directly on the tank wall. It improves cleanliness of the horizontal tank connections and ensures that no area of the tank inlet or tank outlet is left uncleaned.

 Related Industries:

Home and Personal Care

State-of-the-art horizontal mixproof valve

Based on the well proven and exceptionally versatile principle of the Unique Mixproof valves, this horizontal mixproof tank valve features many of the same components, such as the actuator, yoke and seals, and therefore the same spare parts. This provides the benefits of easy serviceability and low total cost of ownership.

Alfa Laval Unique Mixproof Horizontal Tank Valve, can be fitted with any level of sensing and control. It is as standard supplied with seat lift, which enables handling of two different products at the same time, or safe handling of one product while seat-lift cleaning operations are being conducted in the other portion of the valve – all without any risk of cross-contamination. The double tangential design of the valve body ensures full drainability, especially when the valve is mounted at the bottom of a flat-bottomed tank.

Exceptional spillage-free operation

A state-of-the-art double-seat design provides long-lasting, spillage-free operation thus minimizing the risk of product contamination. The use of double lip seals provides added protection to ensure safe and hygienic operation.

Easy valve to maintain and clean

Unique mixproof valves feature a top-loaded design, making maintenance fast and easy. It also features no adjustable components, a maintenance-friendly actuator and built-in leakage detection on all seals. Unique mixproof valves meet most hygienic standards and can be supplied with the optional SpiralClean cleaning system.

Valve clusters – customized flow solutions

We are specialists in providing pre-built valve clusters customized to meet specific, individual requirements.
Our expertise helps ensure you the most efficient flow management, using as few components as possible and dealing effectively with key issues that include thermal cycling, cleanability, drainability and flow control.
Alfa Laval valve clusters can be supplied pre-assembled and pre-tested as well as fully wired and with all the necessary pneumatic tubing, junction boxes and control panels pre-connected.
This means you can bring even complex installations online as quickly as possible, saving time and avoiding lost revenue associated with on-site troubleshooting and downtime.

For more information, please refer to Documentation and to the Selection Guide.

For cost-effective alternatives to the Unique mixproof valve range, Alfa Laval also offers standard SMP mixproof valves.

Product benefits

  • Cost effective
  • Safe and hygienic operation
  • Easy to maintain and clean
Construction

The Unique mixproof valve concept is based on a series of base components, including valve body, valve plug, actuator and cleaning options and accessories that support a wide range of applications. Using these components, you can build a Unique mixproof valve to match your exact process requirements.

To facilitate maintenance, the Unique mixproof valve also features leakage detection holes that provide advance notification of wear or damage to static o-rings. Operators can visually inspect the valve at any time without having to disassemble it.

Operating principle

The Alfa Laval Unique mixproof valve is a normally closed (NC) valve that is controlled from a remote location by means of compressed air.

To separate the two liquids, the valve has two independent plug seals. The space between the two seals forms an atmospheric leakage chamber. In the rare case of accidental product leakage, the product flows into the leakage chamber and is discharged through the leakage outlet.

When the valve is open, the leakage chamber is closed. The product can then flow from one line to the other without spillage. The valve can easily be cleaned and protected against the effects of water hammer according to the specific requirements of the process and the configuration of the valve. (There is no product spillage during valve operation).

 

 

SpiralClean system

To ensure the hygienic operating condition of its Unique mixproof valve range, Alfa Laval offers its SpiralClean system to clean the upper and lower balanced plugs and leakage chamber of the valves. Using less cleaning fluid, utilities and time, SpiralClean cleans more thoroughly and efficiently than conventional cleaning devices. All external CIP systems for Unique mixproof valves include the SpiralClean design as standard.

Another big benefit: SpiralClean enables the Unique mixproof valve to operate under aseptic-like conditions, creating a steam barrier to the atmosphere upon applying steam to the CIP pipes.

Unique Mixproof Horizontal Tank Valve

The Unique Mixproof HT valve provides a state of the art solution when there is no CIP pressure or flow from the tank side to clean the seat and plug. The valve is self-cleaning, thanks to two Cleaning-in-Place (CIP) nozzles. The first nozzle is designed specifically for plug cleaning. This double-acting nozzle projects cleaning solution through the tank connection, ensuring complete cleaning of the seat contact surfaces as well as the shadow area of the tank port.

The second is a rotating CIP nozzle incorporated into the unit for optimum cleaning of the full-bore leakage chamber. The design of the single valve body makes it suitable to weld directly on the tank or to connect it via a Tri-clamp.

The 4” and 6” models feature a 45-mm opening, which enables the passage of very large particles or efficient handling of high viscosity fluids.

Options

    • 3-A version available upon request
    • Product wetted seals HNBR, NBR or FPM
    • Male parts or clamp liners in accordance with required standard
    • Control and indication: ThinkTop or ThinkTop Basic
    • Side indication for detection of upper seat lift
DescriptionFeaturesHow It WorksDetailsDocumentation

Alfa Laval Unique Mixproof CP-3 valve (US) 

The Alfa Laval Unique mixproof CP-3 valve is a highly efficient light-weight, reduced vent mixproof valve – maximizing floor space while greatly minimizing CIP consumption, and virtually eliminating downtime. Ideal for all types of hygienic processes.

It is designed with user flexibility in mind. Configurable for applications in all sanitary industries, including compliance with Grade A Pasteurized Milk Ordinance (PMO) and 3-A Sanitary Standards for continuous dairy processing, the modular design offers a wide variety of options.

Related Industries:

Processed Foods, Dairy, Beverages, Brewery, Home & Personal Care

New Unique PMO mixproof valve based on the original DNA

Proud to be the company behind the dairy industry’s first PMO valve, Alfa Laval introduces its successor: the Alfa Laval Unique mixproof CP-3 valve.

The Alfa Laval Unique mixproof CP-3 valve faithfully lives up to its pedigree, offering dairy processors optimum hygiene and legendary performance. A noteworthy innovation: the Unique mixproof CP-3 valve features a reduced-diameter leak detection vent that make the valve more compact and lightweight.

An efficient, sustainable mixproof valve

The Alfa Laval Unique mixproof CP-3 valve is engineered with the latest efficiency and sustainability principles in mind. A fast and efficient actuator requires a smaller volume of air to execute seat lift and seat push, resulting in low air consumption and minimal CIP fluid loss.

The valve seat is designed with throttling edges on the upper and lower seat plugs, which accelerates cleaning fluid to improve CIP efficiency and uses the absolute minimum amount of CIP fluid.

Reduce cost of ownership and downtime

The Alfa Laval Unique mixproof CP-3 valve provides lower cost of ownership and downtime. Only two seals are located in the valve chamber, which enables faster cleaning of the valve during seat lift and requires less seal spares. When the valve is open during actuation, the lower seat seal is not exposed to wear, resulting in longer seal life. Each valve has a modular design and shares common components with standard Alfa Laval Unique PMO valves of similar size.

One mixproof valve brings safety to all hygienic process types

Not just a dairy valve, the Alfa Laval Unique mixproof CP-3 valve is a reduced-vent mixproof valve. Designed to be configurable, it protects your product no matter the hygienic process type.

The Unique mixproof CP-3 valve not only complies with 3-A Sanitary Standard 85-02 for seat-lift cleaning, but also complies with the FDA Pasteurized Milk Ordinance (PMO), while covering all mixproof dairy, food and beverage applications that require 1½” through  6” port sizes.

Construction

The Alfa Laval Unique mixproof CP-3 valve is specifically designed for user flexibility and is configurable for all hygienic dairy, food, and beverage applications.

The Unique mixproof CP-3 valve not only complies with 3-A Sanitary Standard 85-02 for seat-lift cleaning, but also complies with the FDA Pasteurized Milk Ordinance (PMO), while covering all mixproof dairy, food and beverage applications that require 1½” through 6” port sizes.

It consists of a valve body, two independent balanced valve plugs/seals that form a leakage chamber between them, actuator with seat lift, position-detectable upper and lower valve seats and a yoke-mounted external sensor.

Operating principle

The Alfa Laval Unique mixproof CP-3 valve is a normally closed (NC) valve that is controlled from a remote location by means of compressed air.

To separate the two liquids, the valve has two independent plug seals. The space between the two seals forms an atmospheric vent chamber. When the valve is open, the chamber is closed. The product can then flow from one line to the other without spillage. The valve can easily be cleaned and protected against the effects of water hammer according to the specific requirements of the process and the configuration of the valve.

Possible configurations

The Alfa Laval Unique Mixproof CP-3 offers a wide range of options, including:

Lower flush

The Alfa Laval lower flush option ensures CIP of the lower sealing element and the OD of the lower plug during seat push. This option efficiently cleans the lower seal in the housing without the need for external CIP connections, supporting continuous processing.

Balancing flexibility

The Unique Mixproof CP-3 valve has a lower balanced plug to avoid product mix, even in the event of pressure spikes in the system. The upper plug can be configured with or without a balancer depending on the required performance.

SpiralClean

The Alfa Laval SpiralClean system makes it possible to clean the upper and lower plugs and leakage chamber by external CIP connections. The

system cleans more efficiently, uses less cleaning fluid by ensuring that a directional flow of CIP fluid reaches all the surfaces in much less time than with conventional systems.

Spiral Clean of the leakage chamber is not depending on a special type of plug configuration, but can be added to any of the available plug configurations.

Size flexibility (mixed housing)

The valve body can be configured with mixed sizes. The body sections can be fully combined, including the full range of 1-1/2″ through 6″ sizes.

Seat lift and Seat push

Seat lift and seat push enable cleaning of the plug seals of either the upper or lower plug individually. The Unique Mixproof CP-3 range is available in a variety of configurations, including two separate actuator versions. An actuator with both upper seat lift and lower seat push or an actuator without any seat lift/push operations only one period.

The Unique Mixproof CP-3 modular range offers balanced and unbalanced plugs, seat lift/push, CIP for the plugs and leakage chambers and any combination in between.

Actuator with both upper and lower seat lift/push operations

3″/3″, 22-00, with lower balanced plug, SpiralClean leakage chamber, actuator with seat lift/push, and external proximity switch for indication of upper plug position

 

Actuator without any seat lift/push operations

2″/3″, 22-00, with lower balanced plug, actuator without seat lift/push and external proximity switch for indication of upper plug position

 

Options

  • Tri clamp connections
  • Control and Indication: IndiTop, ThinkTop or ThinkTop Basic(ThinkTop is mandatory in a dairy application)
  • External proximity switch for indication of upper plug position (This option is mandatory in dairy applications)
  • Product wetted seals in HNBR, NBR or FPM
  • Various external surface finishes
WORKING PRINCIPLE

Alfa Laval Unique Mixproof CP-3 is remote-controlled by means of compressed air. The valve is a normally closed (NC) valve. The valve has two independent plug seals, forming a leakage chamber between them under atmospheric pressure during every working condition.

In case of rare accidental leaking of product, this will flow into the leakage chamber and be discharged harmlessly through the leakage outlet, without any threat of product mixing or cross contamination. When the valve is open, the leakage chamber is closed. The product can then flow from one line to the other. The valve can be cleaned and water hammer protected to any level according to the needs in the specific process. There is virtually no spillage of product when operating the valve.

POSSIBLE CONFIGURATIONS

The Alfa Laval Unique Mixproof CP-3 offers a wide range of options:

Lower Flush
The Alfa Laval lower flush option ensures clean-in-place (CIP) of the lower sealing element and the OD of the lower plug during seat push. This option efficiently cleans the lower seal in the housing without the need for external CIP connections, supporting continuous processing.

Balancing Flexibility
The Unique Mixproof CP-3 valve has a lower balanced plug to avoid product mix, even in the event of pressure spikes in the system. The upper plug can be configured with or without a balancer, depending on the required performance.

SpiralClean
The Alfa Laval SpiralClean system makes it possible to clean the upper and lower plugs and leakage chamber by external CIP connections. The system cleans more efficiently, uses less cleaning fluid by ensuring that a directional flow of CIP fluid reaches all the surfaces in much less time than with conventional systems. Spiral Clean of the leakage chamber is not dependent on a special type of plug configuration, but can be added to any of the available plug configurations.

Size Flexibility
The valve body can be configured with mixed sizes. The body sections can be fully combined, including the full range of 1 1/2 inch through 6 inch sizes.

Seat Lift and Seat Push
Seat lift and seat push enable cleaning of the plug seals of either the upper or lower plug individually. The Unique Mixproof CP-3 range is available in a variety of configurations, including two separate actuator versions. An actuator with both upper seat lift and lower seat push or an actuator without any seat lift/push operations only one period.

MATERIALS
Product Wetted Steel Parts 316L
Other Steel Parts 304
Product Wetted Seals EPDM (standard), HNBR, NBR, or FPM
Other Seals CIP seals: EPDM
Actuator seals: NBR
Guide strips: PTFE
Finish Options Internal bright (polished) Ra<32µ”
Internal/external bright (internal polished) Ra<32µ”

Note: The Ra values are only for the internal surface.

TECHNICAL DATA
Product Pressure (max) 145 psi (for higher pressure, please ask CSI)
Product Pressure (min) Full vacuum
Temperature Range 23°F – +257°F (depending on seal material)
Air Pressure 116 psi
DIMENSIONAL DATA
1 1/2(in) 2(in) 2 1/2(in) 3(in) 4(in) 6(in)
*A 24.055 25.827 29.921 29.921 36.299 40.394
B 6.693 8.661 8.661 8.661 11.811 11.811
**C 2.394 2.906 3.398 3.894 4.866 6.806
OD 1.496 2.008 2.500 2.996 4.000 6.000
ID 1.370 1.882 2.374 2.870 3.843 5.782
t 0.063 0.063 0.063 0.063 0.079 0.109
E 5.669 6.496 7.874 7.598 9.764 10.768
F1 1.240 1.240 1.496 1.496 2.323 2.323
F2 0.197 0.197 0.197 0.197 0.197 0.197
øD 4.724 4.724 6.181 6.181 7.323 7.323
L 9.055 9.055 9.921 9.921 11.063 11.063
M/Tri-Clamp® 0.827 0.827 0.827 0.827 0.827 1.518
Weight (lb) 32 35 60 60 84 115

*For the A-measure, if there are different upper/lower body sizes, please refer to the Configurator in Alfa Laval Anytime or contact CSI.

**The dimension C can always be calculated by the formula C = ½ID-upper + ½ID-lower + 1.02 inches

 

DescriptionFeaturesHow It WorksDetailsDocumentation

Unique PMO Plus Mixproof Valves (US)

The Alfa Laval Unique PMO Plus® mixproof valve offers all the performance of a Unique Mixproof valve and, in addition, meets the requirements of 3-A/PMO standards. The mixproof valve design allows clean-in-place (CIP) fluid to flow to clean one chamber while product is running in the other chamber, without the risk of cross-contamination. Eliminating clean-in-place (CIP) downtime and allowing automated product transfer are just two of the advantages that mixproofs provide. Unique PMO Plus Mixproof Valves combine Alfa’s superior cleanability and reliability with the required features for meeting the PMO standard making it a powerful solution for dairy applications.

Related Industries:

Processed Foods, Dairy

PMO-compliant mixproof valves

With the most complete and consistent family of valves available, each PMO variant is based on the same trusted and proven standard PMO mixproof valve – backed by thousands installed globally. Alfa Laval Unique PMO (Pasteurized Milk Ordinance) mixproof valves meet the stringent requirements of the FDA’s Pasturized Milk Ordinance and are fully 3A compliant. All seat movements are detectable, using Alfa Laval ThinkTop® valve sensing and control devices. This makes Unique PMO mixproof valves an extremely secure solution to help manage and optimize the flow of your individual dairy processes.

Unique PMO mixproof valves are primarily installed in the US – globally standard Unique mixproof valves are the preferred choice.

Modular design – flexible valve installations

The Unique PMO mixproof range is constructed from a series of base components that provide flexible configurations to fit your application requirements. Because the same valve body is utilized in all standard mixproof valve configurations, upgrading is fast with no need to remove the valve body; simply exchange the plugs, actuators and other minor elements. The benefit is an ease of interchangeability exclusive to Alfa Laval where any installed standard PMO valve can be easily upgraded from PMO to PMO – F, to PMO Plus® to PMO Plus – CP.

Lower total cost of ownership

Cost-saving features include the top-loaded, easy-to-disassemble design, no adjustable components and fully protected, long-life radial seals.

Unique PMO valve range

Alfa Laval offers the most comprehensive range of PMO-compliant mixproof valves:

Standard Unique PMO mixproof valves:

  Unique PMO complies with the FDA`s Pasterized Milk Ordinance (PMO) and covers all mixproof dairy applications.
 

Unique PMO-F for cleaning or flushing product build-up during continuous operation

 

Unique PMO Plus® allows seat lift cleaning in one chamber while product is the the other.

 

Unique PMO Plus® CP for continuous product processing in any chamber while cleaning product in the other chamber

Unique PMO mixproof tank valves:

Unique PMO mixproof valves for special processing applications:

  Unique PMO horizontal tank valve completely drainable in horizontal positions – for continuous processing right up to the tank port.
  Unique PMO vertical tank valve completely  drainable in vertical positions – for continuous processing right up to the tank port.
 

Unique PMO Cheese Curd for gentle, yet efficient, handling of large curd particles

 

Unique PMO Curd CP for continuous cheese curd processing with large particles in any chamber while cleaning product in the other chamber

Construction

The Alfa Laval Unique PMO mixproof valve consists of a valve body, two independent balanced valve plugs/seals, actuator with seat lift, position-detectable upper and lower valve seats and a yoke-mounted, external sensor.

Operating principle

The Alfa Laval Unique PMO mixproof valve is a normally closed (NC) valve that is controlled from a remote location by means of compressed air.

To separate the two liquids, the valve has two independent plug seals. The space between the two seals forms an atmospheric chamber.

When the valve is open, the chamber is closed. The product can then flow from one line to the other without spillage. The valve can easily be cleaned and protected against the effects of water hammer according to the specific requirements of the process and the configuration of the valve.

All Unique PMO mixproof valves are equipped with Alfa Laval ThinkTop valve sensing and control devices, which fulfill regulatory requirements for detection of seat lift and feedback signal.

Options

• Fittings in accordance with required standard.

THE PASTEURIZED MILK ORDINANCE (PMO)

Paragraph 15p(B) of the Pasteurized Milk Ordinance (PMO) outlines the requirements for the use of mixproof valves in applications involving milk products and cleaning solutions to ensure the hygienic and safe separation of dairy products flowing concurrently through the same valve.

The PMO requires that:

  • Both valve seats must be position detectable
  • The leakage chamber, found in all mixproof valves, must have the same cross-sectional area as the valve body port connections
  • The actuator must be fail-safe by spring-to-close

In 2007, the Food and Drug Administration (FDA) changed the PMO to allow clean-in-place (CIP) solution to clean one valve seat while product is flowing in the opposite housing. This change virtually eliminates CIP downtime, so processors can run continuous dairy operations and increase production.

In 2008 the FDA issued memorandum M-b-356, confirming that Alfa Laval’s Unique PMO Plus mixproof valve is Pasteurized Milk Ordinance paragraph 15p(B) compliant.

The following benefits make the Unique PMO Plus stand out from the competition:

  • Proven design: Same fundamental technology used in the industry for more than a decade
  • Retrofittable: Replacement of a few components enables conversion of installed Unique PMO valves to Unique PMO Plus
  • Only three elastomers in the isolation chamber: Minimizes risk of product contamination
  • Tested and FDA compliant to 145 psi: The highest operating pressure available for the widest range of process applications
  • Designed with a mix of radial and axial seals: A proven, leading design to protect product
  • Standard, single unit actuator: Simple operation with fewer moving parts
  • Same wetted and actuator service kits as the unique PMO valve: No need to learn or stock new parts
  • Maintenance friendly: No adjustments are required when reassembling the valve after service
CONCEPT

This Unique PMO Plus Mixproof valve is based on the well proven and exceptionally flexible design of the Unique PMO Mixproof valves from Alfa Laval. It meets the demands from the 3-A/PMO (Pasteurized Milk Ordinance paragraph 15p(B)) standards saying that all movements have to be detectable, as well as the vent tube has to have the same or greater area than the connection pipe. Furthermore, the Unique PMO Plus meets the FDA demands for seat lift compliance M-b 356. This allows CIP flow to clean one chamber while product is running in the other chamber, thus eliminating CIP downtime. Finally, the actuator is fail-safe by spring-to-close.

WORKING PRINCIPLE

Unique PMO Plus is remote-controlled by means of compressed air. The valve is a normally closed (NC) valve. The valve has two independent plug seals, forming a leakage chamber between them which is at atmospheric pressure or less during every working condition. In the rare case of fluid passing a valve seat, the fluid will enter the leakage chamber and be discharged through the leakage outlet. When the valve is open, the leakage chamber is closed.

BUILD-UP

This PMO Plus edition of the Unique Mixproof valve is a high-end valve with regards to process security as well as from a sanitary point of view. The valve plugs are always balanced in both upper and lower valve body, securing no sensitivity to pressure spikes. The lower and upper seats are position-detectable by the ThinkTop® and a yoke-mounted, external sensor.

Unique PMO vs. Unique PMO Plus

MATERIALS
Product Wetted Steel Parts 316L
Other Steel Parts 304
Product Wetted Seals NBR (std.), EPDM, HNBR, or FPM
Other Seals CIP seals: EPDM
Actuator seals: NBR
Finish External bright/internal polished Ra<32µ”

Note: The Ra values are only for the internal surface.

TECHNICAL DATA
Product Pressure (max) 145 psi (for higher pressure, contact CSI)
Product Pressure (min) Full vacuum
Temperature Range 23°F – +257°F (Depending on seal material) (For higher temperature, contact CSI)
Air Pressure 116 psi