Alfa Laval’s regulating valves are used for adjusting or monitoring flow volumes and flow directions. It is specially designed for use in a broad range of metering, blending, weighing and filling system applications, they are the ideal solutions for precision control of flow rate or pressure.

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

DescriptionFeaturesHow It WorksCPMI-2CPMO-2Documentation

Alfa Laval Constant Pressure Modulating Valves (CPM)

CPM valves maintain uniform inlet (CPMI-2) or outlet (CPMO-2) pressure in hygienic process lines for the dairy, food and beverage industries. These regulating valves provide accurate pressure control, safe and reliable performance and excellent cleanability.

Models

  • CPMI-2 (Inlet)
  • CPMO-2 (Outlet)

Related Industries:

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

Safe, effective pressure control

Alfa Laval Constant Pressure Modulating (CPM) valves are pneumatic regulating valves that maintain a constant inlet or outlet pressure in hygienic process lines. Thanks to a quick response diaphragm, these compact valves immediately react to any change in product pressure, adjusting position to keep the pressure at preset values.

Excellent valve cleanability

CPM valves feature a self-draining design and crevice-free, bowl-shaped valve body with welded valve seat to enable thorough cleaning, thus eliminating potential entrapment areas. The unique diaphragm with PTFE on the lower diaphragm also contributes to excellent cleanability.

Constant pressure valve range

Alfa Laval offers three types of CPM valves. Modular design enables the use of different plug sizes and different flow rates between 0.5 and 110 m3/h provide great operational flexibility.

Upon request, some CPM valves can be provided as ATEX-approved valves (group 2 category 3 D&G applications) for use in potentially explosive areas.

Compliance with most hygienic standards

Alfa Laval CPM valves meet most standards requested in the dairy, food and beverage, and personal care industries. Aseptic version

Designed to maintain a constant pressure at the valve inlet or outlet, using different plug sizes and different Kv values.

The diaphragm in the valve enables it under aseptic conditions to react effectively to any changes in product pressure by shifting position against a constant air pressure.

The CPM valve is often used upstream of aseptic filling and bottling machines.

Construction

There are two different types of construction for Alfa Laval Constant Pressure Modulating valves.

The CPMI-2 and CPMO-2 valves consist of a valve body with valve seat, cover, a valve plug with a special diaphragm and a clamp. The diaphragm consists of two flexible EPDM diaphragms supported by 12 stainless steel sectors in between them. The cover and the valve body are clamped together. The valve body and the seat are welded together.

The CPM-I-D60 consists of a CPMI-2 valve with additional piping.

Operating principle

The CPMI-2, CPMO-2 and CPM-I-D60 valves are controlled remotely by means of compressed air. The valves operate without a transmitter in the product line and only require a pressure-regulating valve for the compressed air and a pressure gauge in the product line (see below).

Where modulating back pressure is required (i.e., to maintain a fixed flow in and out of the CPM valve), the air supply to the valve can be provided by an I/P converter (typically 3-15 psi) and a booster valve. The product pressure dictates the pressure ratio of the booster valve.

A diaphragm reacts immediately to any alteration of the product pressure and changes position so that the preset pressure is maintained.

Inlet side: The Constant Pressure Modulating Inlet (CPMI-2) valves and the Constant Pressure Modulating Inlet D60 (CPM-I-D60) valves maintain constant pressure in the process line at the inlet side of the valve. CPMI-2 and CPM-I-D60 open when product pressure increases and close when product pressure decreases. These are often installed downstream from separators and heat exchangers, and may also be used as overflow valves.

Outlet side: The Constant Pressure Modulating Outlet (CPMO-2) valves maintain constant pressure in the process line at the outlet side of the valve. CPMO-2 closes when product pressure increases and opens when product pressure decreases (see illustration below). It is often installed upstream from pasteurizers, separators and filler systems of filtration units.

Options

  • Fittings in accordance with required standard
  • Air pressure regulating valve kit, 0-8 bar
  • Diaphragm in PTFE covered in EPDM or PTFE
  • Seals in NBR, FPM or PTFE
  • Air throttling valve for adjustment of regulating speed for the CPM-2 valve
  • Booster for product pressure exceeding the available air pressure (Product pressure = 1.8 x air pressure)
  • 3A version available on request for CPMI-2 and CPMO-2 valves only

CPMI-2

Constant-Pressure Modulating Inlet Valve

CPMO-2

Constant-Pressure Modulating Outlet Valve

Constant-Pressure Modulating Inlet Valve D60

 

Alfa Laval Constant Pressure Modulating Inlet (CPMI) valves are sanitary constant-pressure valves for use in stainless steel pipe systems. The CPMI-2 valve maintains a constant pressure in the process line at the inlet side of the valve. Typical applications of this valve are after separators, heat exchangers, and as an overflow valve.

 

 

WORKING PRINCIPLE

The CPMI-2 is remotely controlled by means of compressed air. The valve operates without a transmitter in the product line and requires only a pressure regulating valve for the compressed air and a pressure gauge in the product line.

A diaphragm/valve plug system reacts immediately to any alteration of the product pressure and changes position so that the preset pressure is maintained. CPMI-2 opens at increasing product pressure and vice versa.

STANDARD DESIGN

The CPMI-2 consists of a valve body with valve seat, cover, a valve plug with a diaphragm unit, and a clamp. The diaphragm unit consists of a stainless steel disc—which is divided into sector—and flexible diaphragms that are placed on each side of the sectors. The cover and the valve body are clamped together. The valve body and the seat are welded together. The CPMI-2 meets 3-A standards.

MATERIALS
Product Wetted Steel Parts 316L
Other Steel Parts 304
Lower Diaphragm PTFE covered EPDM rubber (standard)
Solid PTFE
Upper Diaphragm Nitrile (NBR) standard
PTFE covered EPDM rubber
Solid PTFE
O-ring Buna (standard)
Fluorinated rubber (FPM) covered EPDM rubber
Finish 32 Ra
TECHNICAL DATA
Max Product Pressure 145 psi
Min Product Pressure 0 psi
Max Product Viscosity 500 cps
Temperature Range 14 – 203°F
Temperature Range with PTFE/EPDM Upper Diaphragm 14 – 286°F (higher on request)
Air Pressure 0 – 116 psi
Air Connections R ¼ inch (BSP), internal thread

OPTIONS

ORDERING OPTIONS
  • Plug size (Cv 23, Cv 8, Cv 10, or Cv 2/18)
  • Diaphragm type if not standard
  • Connections if not welding ends
  • Optional equipment if needed
OPTIONAL EQUIPMENT
  • Male parts or clamp liners in accordance with required standard
  • Pressure gauge 0 – 87 psi, 1½ inch
  • Pressure gauge 0 – 145 psi, 1½ inch
  • Air pressure regulating valve kit, 0 – 116 psi
  • Air throttling valve for adjustment of regulating speed for the CPM-2 valve
  • Booster for product pressure (product pressure = 1.8 x air pressure) exceeding the available air pressure
  • 3-A Sanitary Standard labelling on request

 

The Alfa Laval CPMO-2 (Constant Pressure Modulating Outlet) is a sanitary constant pressure valve for use in stainless steel pipe systems. The CPMO-2 maintains a constant pressure in the process line at the outlet side of the valve.

A CPMO-2 valve is typically used before filling or bottling machines and in other applications where constant pressure must be maintained.

 

WORKING PRINCIPLE

CPMO-2 is remotely controlled by means of compressed air. The valve operates without a transmitter in the product line and requires only a pressure regulating valve for the compressed air and a pressure gauge in the product line.

A diaphragm/valve plug system reacts immediately to any alteration of the product pressure and changes position so that the preset pressure is maintained. CPMO-2 closes at increasing product pressure and vice versa.

STANDARD DESIGN

The CPMO-2 consists of a valve body with valve seat, cover, a valve plug with a diaphragm unit, and a clamp. The diaphragm unit consists of a stainless steel disc—which is divided into sectors—and flexible diaphragms that are placed on each side of the sectors. The cover and the valve body are clamped together. The valve body and the seat are welded together. The CPMO-2 meets 3-A standards.

MATERIALS TABLE
Product Wetted Steel Parts 316L
Other Steel Parts 304
Lower Diaphragm PTFE covered EPDM rubber (standard)
Solid PTFE (optional)
Upper Diaphragm Nitrile (NBR) standard
PTFE covered EPDM rubber (optional)
Solid PTFE (optional)
O-ring Buna (standard)
Fluorinated rubber (FPM) covered EPDM rubber (optional)
Finish 32 Ra
TECHNICAL DATA TABLE
Max Product Pressure 145 psi
Min Product Pressure 0 psi
Max Product Viscosity 500 cps
Temperature Range 14 – 203°F
Temperature Range with PTFE/EPDM Upper Diaphragm 14 – 286°F (higher on request)
Air pressure 0 – 116 psi
Air connections R ¼ inch (BSP), internal thread

OPTIONS

ORDERING OPTIONS
  • Plug size (Cv 23, Cv 8, Cv 10, or Cv 2/18)
  • Diaphragm type if not standard
  • Connections if not welding ends
  • Optional equipment if needed
OPTIONAL EQUIPMENT
  • Male parts or clamp liners in accordance with required standard
  • Pressure gauge 0 – 87 psi, 1½ inch
  • Pressure gauge 0 – 145 psi, 1½ inch
  • Air pressure regulating valve kit, 0 – 116 psi
  • Air throttling valve for adjustment of regulating speed for the CPM-2 valve
  • Booster for product pressure (product pressure = 1.8 x air pressure) exceeding the available air pressure
  • 3-A Sanitary Standard labelling on request
DescriptionFeaturesHow It WorksDocumentation

SPC-2 regulating valvesAlfa Laval SPC-2 Regulating Valves

SPC-2 regulating valves provide accurate control of pressure, flow, temperature and liquid levels in tanks and stainless steel pipe systems used for hygienic processes in the dairy, food and beverage, and biopharm industries.

Looking for a replacement of SPC Series valve? Check out the 7710 or 7711 regulating valves from the Unique 7000 Series.

Extremely accurate valve flow regulation

Alfa Laval offers two regulating valves: the SPC-2 and a aseptic version, the SPC-2A. These normally open regulating valves provide highly accurate control of pressure, flow, temperature and fluid levels in tanks and in steel pipe systems.

Advanced hygienic valve design

SPC-2 valves are ideal for high-volume sanitary process applications that require precision control. With a self-draining valve body, these valves are authorized to carry the 3-A symbol. Especially suitable for aseptic applications that require SIP (Sterilization in Place), the SPC-2 valves are fitted with PTFE diaphragms that prevent contamination from microorganisms and particles outside the product zone.

Extreme valve accuracy

The SPC-2 features an electro-pneumatic actuator with integrated IP converter and integrated positioner, which contribute to greater operational accuracy and reliability. SPC-2 valves are IP-54 certified for water, dust and shock resistance.

SPC-2 valve range

The SPC-2 is based on modular components that enable the selection of different plug configurations to meet specific requirements. Normally closed valves are available upon request. For more information, please refer to Documentation.

Aseptic version

The aseptic version of Alfa Laval’s SPC-valve is called SPC-2A. This is an electro-pneumatic modulating valve that features an IP converter as an integrated part of the actuator. Available with a range of plug designs with different Kv values, providing different capacities.

Supplied with a diaphragm that provides hermetic sealing against intrusion from the atmosphere, ensuring full protection against the effects of micro-organisms during processing.

This design allow aseptic control of pressure, flow, temperature in aseptic systems and to control the level of liquids in aseptic tanks.

Like all Alfa Laval valves, the SPC-2A is constructed with few moving parts housed in the actuator for added wear protection. Its compact hygienic design contributes reduces the need for maintenance and makes disassembly, if required, quick and easy. Plus there are no loose springs to pose any safety risk when opening the valve.

Low maintenance requirements

Like all Alfa Laval valves, the SPC-2 is constructed with few moving parts housed in the actuator for added wear protection. Its compact hygienic design contributes reduces the need for maintenance and makes disassembly, if required, quick and easy. Plus there are no loose springs to pose any safety risk when opening the valve.

Compliance with most hygienic standards

Alfa Laval SPC-2 valves meet most standards requested in the dairy, food and beverage, and personal care industries.

 

Extremely accurate valve flow regulation

Alfa Laval offers two regulating valves: the SPC-2 and a aseptic version, the SPC-2A. These normally open regulating valves provide highly accurate control of pressure, flow, temperature and fluid levels in tanks and in steel pipe systems.

Advanced hygienic valve design

SPC-2 valves are ideal for high-volume sanitary process applications that require precision control. With a self-draining valve body, these valves are authorized to carry the 3-A symbol. Especially suitable for aseptic applications that require SIP (Sterilization in Place), the SPC-2 valves are fitted with PTFE diaphragms that prevent contamination from microorganisms and particles outside the product zone.

Extreme valve accuracy

The SPC-2 features an electro-pneumatic actuator with integrated IP converter and integrated positioner, which contribute to greater operational accuracy and reliability. SPC-2 valves are IP-54 certified for water, dust and shock resistance.

SPC-2 valve range

The SPC-2 is based on modular components that enable the selection of different plug configurations to meet specific requirements. Normally closed valves are available upon request.

The aseptic version of Alfa Laval’s SPC-valve is called SPC-2A. This is an electro-pneumatic modulating valve that features an IP converter as an integrated part of the actuator. Available with a range of plug designs with different Kv values, providing different capacities.

Supplied with a diaphragm that provides hermetic sealing against intrusion from the atmosphere, ensuring full protection against the effects of micro-organisms during processing.

This design allow aseptic control of pressure, flow, temperature in aseptic systems and to control the level of liquids in aseptic tanks.

Like all Alfa Laval valves, the SPC-2A is constructed with few moving parts housed in the actuator for added wear protection. Its compact hygienic design contributes reduces the need for maintenance and makes disassembly, if required, quick and easy. Plus there are no loose springs to pose any safety risk when opening the valve.

Low maintenance requirements

Like all Alfa Laval valves, the SPC-2 is constructed with few moving parts housed in the actuator for added wear protection. Its compact hygienic design contributes reduces the need for maintenance and makes disassembly, if required, quick and easy. Plus there are no loose springs to pose any safety risk when opening the valve.

Compliance with most hygienic standards

Alfa Laval SPC-2 valves meet most standards requested in the dairy, food and beverage, and personal care industries.

 

DescriptionFeaturesHow It WorksDetailsDocumentation

Alfa Laval Unique RV-ST Regulating Valve 

With an integrated IP converter and push-and-play setup, the Unique RV-ST regulating valve meets the highest process demands for hygiene and safety. Built on the Unique SSV platform, it is ideal for high-volume sanitary liquid processing applications.

Related Industries:

Related Industries: Processed Foods, Dairy, Beverages, Brewery, Home & Personal Care, Agriculture Processing

 

Hygienic corrosion-free regulating valve

The Alfa Laval Unique RV-ST is an intelligent hygienic regulating valve that safely and effectively controls process flows with Kv values between 9 and 246 m3/hour. It is designed for a wide range of fluid handling duties, such as metering, blending, weighing and filling system duties, in the food and beverage, brewery, biotech and pharmaceutical and chemicals industries. Corrosion-free features, such as tapered stainless steel stems, ensure product safety according to EHEDG (European Hygienic Engineering & Design Group) guidelines.

Advanced electro-pneumatic controller

The Unique RV-ST regulating valve comes with an advanced electro-pneumatic controller with an integrated IP converter. This offers superiorcontrol of product flow by combining different pressure drops and stroke lengths. It also features a contact-free analog position sensor, which measures the position of the valve spindle, and a standard Profibus DP-V1 or optional DeviceNet communications interface. Analogue or binary feedback is available as options.

Easy push-and-play regulating valve setup

With a push of a button, the Alfa Laval Unique RV-ST regulating valve automatically calibrates itself so that it is fully operational.

Reliable, easy to maintain

Built on the proven Unique SSV (Single Seat Valve) platform, which has an installed base of more than one million valves, the Alfa Laval Unique RV-ST UltraPure offers the same reliability, safety and ease of maintenance. Its offers protection class IP65 and IP67 for tough process environments.

A regulating valve with maximum flexibility

It uses the same few moveable components, spare parts and maintenance tools and procedures as Alfa Laval Unique SSV valves. Using the upgrade kit available, it is possible to upgrade older regulating valves with the new control unit. The new control unit also supports rebuild of the actuator from NC (Normally Closed) to NO (Normally Open) and vice versa.

Construction

The Alfa Laval Unique RV-ST regulating valve with integrated IP converter is a second-generation single-seat valve. It features:

  • Broad selection of stainless steel tapered valve stems
  • Unique actuator with electro-pneumatic process controller for precise control of product flow
  • Rugged, long-lasting plastic stem bushings that eliminate metal-to-metal galling
  • Standard EPDM plug seal used by the entire Unique valve series

The stems are threaded to the actuator shaft, which eliminates the coupling between the stem and the actuator, thereby ensuring proper alignment. Bushings at end of the actuator cylinder support the stem and ensure perfect alignment.

Operating principle

The Alfa Laval Unique RV-ST regulating valve can be controlled from a remote location by means of a digital electro-pneumatic process controller.

The control unit comes in two versions: with or without display. It has an analogue 4-20 mA communication interface and is protected according to IP66 and IP67.

Options

  • Male parts or clamp liners in accordance with required standard
  • Product wetted seals in HNBR or FPM
  • Maintainable actuator
  • External surface finish blasted
  • Optional plug seal: HNBR or FPM

RV - ST Top

RV - ST Valve

Concept Unique

RV-ST is the third generation of Alfa Laval single seat regulating valves designed to meet the highest process demands of hygiene and safety. Built on a well-proven, platform from an installed base of more than one million valves, it is ideal for high volume, sanitary liquid processing applications where precision control of flow rate or pressure is required.

Working principle

The valve is remote-controlled by a digital electro-pneumatic process controller. It has few and simple moveable parts which results in a very reliable valve.

TECHNICAL DATA

Max. product pressure: . . . . . 10 bar (1000 kPa).

Min. product pressure: . . . . . Full vacuum.

Temperature range: . . . . . . . . 10°C to +140°C (EPDM).

Air pressure: . . . . . . . . . . . . 5 – 7 bar (500 to 700 kPa).

Positioner data

Material: . . . . . . . . . . . . . . . PPS, stainless steel

Cover: . . . . . . . . . . . . . . . . PC

Seals: . . . . . . . . . . . . . . . . EPDM

Supply voltage: . . . . . . . . . . 24 VDC +/- 10%

Working temperature: . . . . . . 0 to 55 °C

Push-in fittings: . . . . . . . . . . ø6mm or 1/4”

Protection class: . . . . . . . . . IP65 and IP67

Position detection module: . . . Contact-free, wear-free

Communication: . . . . . . . . . . Analog

 

8692 Positioner – Top control with display

Setpoint setting: . . . . . . . . . 0/4 to 20mA and 0 to 5 5/10V

Output resistance: . . . . . . . . 0/4 to 20 mA: 180Ω 0 to 5/10V: 19Ω

Power consumption: . . . . . . < 5W

Cable gland: . . . . . . . . . . . . 2xM16x1,5 (cable-ø10mm)

Max. wire diameter . . . . . . . . 1.5 mm2

 

PHYSICAL DATA

Product wetted steel parts: . . .1.4404 (316L)

External finish . . . . . . . . . . . .Semi-bright (blasted)

Internal finish . . . . . . . . . . . .Bright (polished), internal Ra < 0.8 µm

Other steel parts: . . . . . . . . .1.4301 (304)

Plug seal: . . . . . . . . . . . . . .EPDM

Other product wetted seals: . .EPDM (standard)

Other seals: . . . . . . . . . . . . .NBR

 

8694 Positioner – Basic control without display

Setpoint setting: . . . . . . . . .0/4 to 20mA

Output resistance: . . . . . . . .180Ω

Power consumption: . . . . . .< 3,5W

Cable gland: . . . . . . . . . . . .2xM16x1,5 (cable-ø10mm)

Max. wire diameter . . . . . . . .1.5 mm

Standard design

Designed to deliver years of reliable performance, it features a broad selection of stainless steel, tapered valve stems along with the Unique actuator to ensure an outstanding degree of precise product control. Rugged and long-lasting plastic stem bushings eliminate metal-to-metal galling. The stems are threaded to the actuator shaft, eliminating the coupling between the stem and the actuator, thereby ensuring proper alignment. The plug seal is a standard seal used for the entire Unique Series. Bushings at the end of the actuator cylinder support the stem and ensure perfect alignment.

Other valves in the same basic design

– Sanitary Unique Single Seat

– Standard valve – Reverse acting valve

– Long stroke valve

– Manually operated valve

– Aseptic valve

Options

  1. Male parts or clamp liners in accordance with required standard
  2. Product wetted seals in HNBR or FPM
  3. Maintainable actuator
  4. External surface finish blasted
  5. Optional plug seal: HNBR or FPM

 

How to Use Data to Select Valve Size

After the Kv factor for a specific application has been calculated, locate the factor on the following page. Choose the curve closest to the 50% stroke. Using the above example, refer to the chart on the previous page you will find that the Kv factor (49) is marked on the chart. You will find that a 2″ valve crosses 1 Kv curve, 2½” 1 curve, 3″ 3 curves and 4″ 3 curves. The correct valve size to use is 2″ because Kv 49 crosses the curve closest to the optimum operating point 50%. Alternatively the 4″ valve is also close to the 50%.

DescriptionFeaturesHow It WorksDocumentation

Unique RV-P

The Unique RV-P regulating valve is designed to safely and effectively control or regulate precision flows in the dairy, food and beverage, and biopharm industries.

Relate Industries:

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

 

Extremely accurate valve flow regulation

Alfa Laval offers two regulating valves:Unique RV-P and an aseptic version, Unique RV-P Aseptic. These normally open  or normally closed regulating valves provide highly accurate control of pressure, flow, temperature and fluid levels in tanks and in steel pipe systems.

Advanced hygienic valve design

Unique RV-P valves are ideal for high-volume sanitary process applications that require precision control. With a self-draining valve body, these valves are authorized to carry the 3-A symbol. Especially suitable for aseptic applications that require SIP (Sterilization in Place), the Unique RV-P valves are fitted with PTFE diaphragms that prevent contamination from microorganisms and particles outside the product zone.

Extreme valve accuracy

The Unique RV-P features an electro-pneumatic actuator with integrated IP converter and integrated positioner, which contribute to greater operational accuracy and reliability. The positioner for Unique RV-P valves are IP66 certified for water and dust protection.

Regulating valves with Unique SSV modularity

The pneumatic actuated regulation valves from Alfa Laval are both built on the same Unique SSV platform and thus modular with the Alfa Laval single seat valve range. The Unique RV-ST is ideal for standard regulating duties like metering, blending, weighing and filling.

If the regulating demands increases then the Unique RV-P is the optimal choise. With a high precision actuator and positioner it is ideal for regulation in applications where the highest accuracy is required. Based on modular components  different plug configurations can be selected to meet specific Kv requirements. The lower sealing element is clamped on and can be replaced to match flexible Kv values.

For more information, please refer to Documentation.

Aseptic version

The aseptic version of Alfa Laval’s Unique RV-P is called Unique RV-P Aseptic. This is an electro-pneumatic modulating valve that features an IP converter as an integrated part of the actuator. Available with a range of plug designs with different Kv values, providing different capacities.

Supplied with a an aseptic diaphragm that provides hermetic sealing against intrusion from the atmosphere, ensuring full protection against the effects of micro-organisms during processing. This design allow aseptic control of pressure, flow, temperature in aseptic systems and to control the level of liquids in aseptic tanks.

Like all Alfa Laval valves, the Unique RV-P Aseptic is constructed with few moving parts housed in the actuator for added wear protection. Its compact hygienic design contributes reduces the need for maintenance and makes disassembly, if required, quick and easy. Plus there are no loose springs to pose any safety risk when opening the valve. The diaphragm is fully modular with the well proven diaphragms from the Unique SSV Aseptic portfolio.

Low maintenance requirements

Like all Alfa Laval valves, the Unique RV-P is constructed with few moving parts housed in the actuator for added wear protection. Being modular with the Unique SSV portfolio it is possible to optimize maintenance routines and spare parts inventories in the plant. Its compact hygienic design contributes reduces the need for maintenance and makes disassembly, if required, quick and easy. Plus there are no loose springs to pose any safety risk when opening the valve.

Compliance with most hygienic standards

Alfa Laval Unique RV-P valves meet most standards requested in the dairy, food and beverage, and personal care industries. Please refer to Documentation for more information.

Construction

The Unique RV-P valve consists of a valve body without seal, cone-shaped regulating plug, lip seal, bonnet and an actuator. The actuator with the bonnet is fitted to the valve body by means of a clamp ring.

The standard valve is supplied with a standard normally open (NO) actuator. Upon request, it may also be supplied with a normally closed (NC) actuator.

Operating principle

Alfa Laval Unique RV-P valves feature an electro-pneumatic actuator with an integrated IP converter, which provide accurate and reliable conversion of electrical signals from a controller directly to pneumatic signals. With the contactless magentic sensor technology the actuator and positioner is insensitive to vibrations and pressure shocks.

The pneumatic signals are relayed to an integrated positioner, which operates by means of the force balance principle. This ensures that the position of the actuator piston is directly proportional to the input signal. Signal range and zero point can be adjusted individually.

By changing the standard measuring spring, the actuator may also be used for split-range operation.

Options

  • Fittings in accordance with required standard
  • Aseptic version based on Unique SSV Aseptic diaphragm system
  • External surface finish of Ra ≤ 0.8μm
  • Explosion protection (EEX ia IIc T6) on request
  • 3A (Sanitary Standard) labelling on request
  • Lip seal of NBR or FPM