CPM Constant-Pressure Modulating Valve

                                   
Concept

CPMI-2, CPMI-D60 and CPMO-2 are sanitary constant-pressure

valves. 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 are after separators, heat exchangers

or 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 are before filling/bottling machines etc.

Working principle

The valves are remote-controlled by means of compressed air. 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

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 cover and

the valve body are clamped together. The valve body and the seat are

welded together. 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 cover and the valve bodies are clamped together.

TECHNICAL DATA

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-: . . . . . 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 (Dp = 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.

PHYSICAL DATA

Materials

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

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

Lower diaphragm: . . . . . . . . . . . . . . PTFE covered EPDMrubber

Upper diaphragm . . . . . . . . . . . . . . NBR

Air Connections

R 1/4" (BSP), internal thread.

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

Material 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).