CPM Valve
Alfa Laval CPM Valve -Constant-Pressure Modulating Valve
The Alfa Laval CPM (Constant-Pressure Modulating) Valve is a pneumatic Regulating Valve that maintains constant pressure in hygienic process lines. Safe, reliable and easy to clean, these Valves quickly adjust position to maintain pre-set pressure values with no need for electronic control.
This valve maintains uniform inlet or outlet pressure in hygienic process lines for the dairy, food, beverage and personal care industries, among many others.
CPM Valve
Benefits
- Safe, effective pressure control
- Self-draining design
- Excellent valve cleanability
- Easy to install, simple to operate
- High hygiene level
Pressure
Max. product pressure: 1000 kPa (10 bar)
Min. product pressure: 0 kPa (0 bar)
Air pressure (CPMI-2/CPMO-2): 0 to 800 kPa (0 to 8 bar)
Air pressure (CPM-I-D60): 0 to 600 kPa (0 to 6 bar)
Temperature Range
With upper diaphragm NBR and lower PTFE/EPDM: -10 °C to +95 °C
With upper diaphragm PTFE/EPDM and lower PTFE/EPDM: -10 °C to +140 °C
ATEX
Classification: II 3 G D
Flow
Flow Kv 23, fully open (Δp = 1 bar): Approx 23 m3/h
Flow Kv 7 (Δp = 1 bar): Approx 7 m3/h
Flow Kv 9 (Δp = 1 bar): Approx 9 m3/h
Flow Kv2/15, low capacity (Δp = 1 bar): Approx 2 m3/h
(Alternative size): (regulating area). Approx. 15 m3/h. (CIP area)
Flow range Kv60, fully open (Δp = 1 bar) (CPM-I-D60): Approx 60 m3/h
Materials
Product wetted steel parts: 1.4404 (316L)
Other steel parts: 1.4301 (304)
Lower diaphragm: PTFE covered EPDM rubber
Upper diaphragm NBR
CPM Valve Technical Data
Download the Full
Specification Sheet
CPM Valve Key Features
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.
Complies 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
How the Alfa Laval CPM Valve Works
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. 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.
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 pasteurisers, separators and filler systems of filtration units. .
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.
CPM Valve Product Documents
Recent Success Story
Hygienic Plant Upgrade Boosts Dairy Capacity by 50%
Alfa Laval equipment helped this Dairy save up to 15% on water, 30% on pump energy use and 80% on energy used for mixing.
Extend the performance of your Valves
CPM Valve
Servicing & Maintenance
CPM Valves are built for a wide range of duties across the Dairy, Food, Beverage, Personal Care, Biotechnology and Pharmaceutical industries.
Related Industries
Alfa Laval technologies improve sustainability through enhanced efficiency, reducing waste and emissions, while increasing yields and end product quality.
Alfa Laval provide high-performance components to maximise efficiency in tasks across the dairy industry, from yoghurts and cheeses to milk, cream and butter.
Alfa Laval’s solutions increase output while minimising contamination and enhancing efficiency, making them ideal for applications in the personal care industry.
