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.

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.

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.

OPTIONS

 

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

Instruction manual – CPM Valve – EN

PD Sheet – CPM Constant-Pressure Modulating Valve – EN

Alfa 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.

Instruction Manual – SPC2 – EN

PD Sheet – SPC-2 Regulating Valve – EN

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.

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.

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%.

PD Sheet – Unique RV-ST Regulating Valve – EN

Instruction Manual – Unique RV-ST Regulating Valve – EN

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.

Scandi Brew (SB) Pressure Exhaust Valve

The Alfa Laval SB Pressure Exhaust Valve is a regulating valve that automatically reduces the working pressure in brewery, food, dairy and beverage process tanks as the pressure in the vessel increases. The valve is an integral part of SCANDI BREW® tank top system.

Safe, effective pressure regulation

Easily integrated into a central process control system, this pneumatic valve ensures safe, reliable and hygienic performance by releasing pressure in the process tank when it exceeds the set point pressure. To ensure safe pressure regulations at all times, the set point pressure can easily be adjusted manually or from a remote location that is connected to the central control system.

Hygienic, easy-to-clean design

To meet exceptionally high levels of hygiene, this regulating valve features simple, straightforward design. Smooth surfaces and food-grade finishes contribute to superior hygiene and cleanability. For fast, effective cleaning, a cleaning nozzle is supplied for inline cleaning of the valve at the same time as Cleaning-in-Place of the vent/recovery mains takes place. Alternatively, an optional CIP supply valve is available to connect a CIP system directly to the valve housing.

Flexible valve mounting

With flexible mounting positions, the valve can be positioned directly on tank top, as part of a tank top system or elsewhere along the pipework as long as there is proper drainage from the valve housing.