Product detail
| Product code | Alfa Laval - CPM |
| Applications | Dairy, food and beverage industries |
Concept
CPMI-2 and CPMI-D60 (Constant-Pressure Modulating Inlet) maintain a constant pressure in the process line at the inlet side of the valve. Typical applications of CPMI-2 and CPMI-D60 are after separators, heat exchangers etc. and as overflow valves.
CPMO-2 (Constant-Pressure Modulating Outlet) maintains a constant pressure in the process line at the outlet side of the valve. Typical applications of CPMO-2 are before filling/bottling machines etc.
Working principle
CPMI-2, CPM-I-D60 and CPMO-2 are remote-controlled by means of compressed air. The valves operate without a transmitter in the product line and require 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.
Standard Design-CPMI/O-2
The CPMI-2 and CPMO-2 consist 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 of flexible diaphragms, which 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.
Standard Design-CPMI-D60
The CPM-I-D60 consists of upper and lower valve bodies, an inlet tube, a cover, a valve plug with diaphragm unit and clamps. The diaphragm unit consists of two flexible diaphragms supported by 12 stainless steel sectors in between them. The cover and the valve bodies are clamped together.
Technical specifications
| Product code | Alfa Laval - CPM |
| Applications | Dairy, food and beverage industries |
| Max. product pressure | 1000 kPa (10 bar) |
| Min. product pressure | 0 kPa (0 bar) |
| Temperature range | 10°C to 95°C (EPDM) |
| Temperature range with upper diaphragm in PTFE/EPDM | 10°C to +140°C (Higher on request) |
| 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) |
| 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 |
| Flow Kv2/15, 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 |
Diaphragm Unit
CPMI-2 and CPMO-2: The diaphragm unit consists of a stainless steel disc which is divided into sectors and of flexible diaphragms which are placed on each side of the sectors. CPM-I-D60: The diaphragm unit consists of two flexible diaphragms supported by 12 stainless steel sectors in between them.
