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GESTRA AG
Cooling Water Control Valves CW

Cooling Water Control Valves CW

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Cooling Water Control Valves CW

Product catalog summary

Features of the CW Series:

Direct acting proportional controller for regulating cooling-water return temperature.
Reduced capital costs and energy consumption due to higher discharge temperatures.
Prevents short-circuiting and automatically balances large systems.
Straight-through body with solid-state expansion thermostat and setting device.
Standard valve type CW 41 includes a pressure gauge (0–6 bar) and thermometer (–30 to +100 °C).
MCW 41 is CW 41 with a diaphragm actuator, retrofitting possible.

Applications:

CW 41: Industrial cooling water.
CW 41/4: Saline fluids, ammoniacal cooling water, and chlorinated hydrocarbons.
CW 44: General cooling water control.
CW 44 k: Wetted internal parts made from stainless steel.
MCW 41: Heavily contaminated cooling systems.

Specifications:

Type CW 41 and CW 41/4: Pressure rating of 16 bar, temperature range from –32 °C to 110 °C.
Type CW 44 and CW 44 k: Pressure rating of 25 bar, temperature range from –37 °C to 110 °C.
Temperature ratings depend on thermostat type: standard (110 °C), wax (100 °C), brine (85 °C).

Temperature Ratings:

MCW 41: Various thermostat and cone combinations with adjustment ranges from –37 °C to 106 °C.

Flowrates and End Connections:

Flowrates (Kvs values) vary by type and size, with CW 41 ranging from 2.1 to 98 m3/h.
End connections include flanged DIN PN 16 and screwed sockets, with overall lengths specified for each type and size.

Catalog excerpts

L CW 44 CW 41 for industrial cooling water CW 44 CW 41/4 > L for saline fluids, ammoniacal cooling water and chlorinated hydrocarbons CW 44k (wetted internal parts made from stainless steel) MCW 41 for heavily contaminated cooling systems > PMX Material Pressure/Temperature [bar] EN ASTM PMA / TMA PMA / TMACW 41 16 6 EN-JS 1049 > 1 ) 16 bar/֖32C 16 bar/110аC > 2 ) > 3 ) CW 41/4 16 6 EN-JS 1049 > 1 ) 16 bar/֖32C 16 bar/110аC > 2 ) > 3 ) CW 44 25 16 1.0460 A 105 > 1 ) 25 bar/2ְC 25 bar/110C > 2 ) > 3 ) CW 44k 25 16 1.0460 A 105 > 1 ) 25 bar/Ж37C 25 bar/85аC > 2 ) > 3 ) > 1 ) ASTM nearest equivalent grade is stated for guidance only. Physical and chemical properties comply with EN. > CW 41 2 ) Temperature only admissible for a short time > 3 ) Admissible temperature depends on type of thermostat: type n (standard) 110 C, type w (wax) 100 а C, type k (brine) 85 C*) For more information see data sheets. > Type Thermostat/cone combination Adjustment rangeCW 41 wr or ws 20аC 60ְC CW 41/4 nr or ns 3C Ж 100C kr or ks Ж32C Ж 74C CW 44 n Ж2C Ж 106C CW 44k k Ж37C Ж 71C w = wax thermostat n = standard thermostat k = thermostat for briner = reduced cone for small flowrates s = standard cone for large flowrates > MCW 41 size="-1">

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Overall length L [mm] Type End connection DN 10 DN 15 DN 20 DN 25 DN 40 DN 50 DN 80 DN 100 > 3 / > 8 " > 1 / > 2 " > 3 / > 4 " 1" 1 > 1 / > 2 " 2" 3" 4" CW 41 Flanged DIN PN 16 ֖ 160 200 230 310 350 CW 41/4 Flanged DIN PN 16 ֖ ֖ 160 200 230 310 350 CW 44 Screwed sockets 95 95 95 95 ֖ ֖ CW 44k Screwed sockets 95 95 95 95 ֖ ֖ > Type Cone DN 25 DN 40, DN 50 DN 80, DN 100CW 41 > 3 r Kvs value [m /h] 2.1 6.5 20 CW 41/4 Kvo (Preset bleed flow) [m > 3 /h] 0.12 0.31 1.0 s Kvs value [m > 3 /h] 10.5 31 98 Kvo (Preset bleed flow) [m > 3 /h] 0.55 1.5 5.0 G > 3 / > 8 G > 1 / > 2 G > 3 / > 4 G 1CW 44 Kvs value...

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Cooling Water Control Valves CW

Cooling Water Control Valves CW

Catalog excerpts

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