The Alfa Laval CPM Constant-Pressure Modulating Valve is a pneumatic regulating valve that maintains a constant pressure in hygienic process lines at the valve inlet or outlet. Safe, reliable and easy to clean, these regulating valves provide accurate pressure control, quickly adjusting position to maintain the pressure at pre-set values without any need for electronic control.
This pneumatic regulating valve maintains uniform inlet or outlet pressure in hygienic process lines for the dairy, food, beverage, personal care and many other industries. Typical applications include filling and bottling equipment.
Benefits:
- Safe, effective pressure control
- Self-draining design
- Excellent valve cleanability
- Easy to install, simple to operate
- High hygienic level
Standard design
The CPM Constant-Pressure Modulating Valve is available in three versions: the CPMI-2, the CPMO-2, and the CPM-I-D60. The CPMI-2 and the CPMO-2 consist of a valve body with valve seat, cover, valve plug with a special diaphragm, and clamp. The diaphragm consists of two flexible PTFE and EPDM diaphragms supported by 12 stainless steel sectors between them. The cover and the valve body are clampedtogether. The valvebodyandtheseatarewelded together.The CPM-I-D60 consists of a valve body in two parts, an upper body and a lower body, as well as an inlet tube, cover, valve plug with diaphragm unit, and clamps. The cover and valve bodies are clamped together. ATEX version is also available.
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Working principle
The Alfa Laval CPM Constant-Pressure Modulating Valve is controlled from a remote location by means of compressed air. A diaphragm or valve plug system reacts immediately to any alteration of product pressure and adjusts its position accordingly to maintain a constant inlet and outlet pressure at pre-set values.
OPTIONS:
A. Male parts or clamp liners in accordance with required standard.
B. Air pressure regulating valve kit, 0-8 bar.
C. Air throttling valve for adjustment of regulating speed for the CPM-2 valve.
D. Booster for product pressure exceeding the available air pressure. (Product pressure = 1.8 x air pressure).
E. US 3A version available on request for CPM-2 valves only
Materials grades CPM-2:
F. Upper diaphragm of PTFE covered EPDM and O-ring of FPM covered EPDM, (for temperature 95-140°C).
G. Both diaphragms of solid PTFE and O-ring of FPM (for temperatures above 140°C).
Material grades CPM-I-D60:
H. Upper diaphragm of PTFE covered EPDM.
I. Valve body seal rings of NBR or FPM.
J. Guide O-ring of FPM (for temperatures above 95°C).
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