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Pressure controlled water valves

PWV series pressure controlled water valves are usually installed on the inlet of condenser, which can regulate the flow of cooling water according to the change of condensing pressure.
When condensing pressure of compressor rises, valve is turned up automatically, so more cooling water enters the condenser to accelerate the condensing of refrigerant. Reversely, when condensing pressure of compressor drops, valve is turned down automatically, so cooling water reduces and the condensing pressure is kept within certain range.
Adjust screw rod at clockwise rotation, the valve is turned down; inversely, the valve is turned up.


Type & data

Symbol

Model

Condenser side

Liquid side

Factory
setting
opening
pressure
(MPa)

Kv value
m3/h

Refrigerant

Adjusting
range
(MPa)

Max.
working
pressure
(MPa)

Max.
testing
pressure
(MPa)

Media

Max.
working
pressure
(MPa)

Max.
Media
temp.
(℃)

Low
pressure

PWV3/8

R134a,
R22,R407C
R404A/507

0.5→1.8

2

2.4

Fresh water

1

60

0.75

0.8

PWV1/2

2.5

PWV3/4

3.2

PWV1

5.0

High
pressure

PWV3/8G

0.7→2.3

2.6

3

2

0.8

PWV1/2G

2.5

PWV3/4G

3.2

PWV1G

5.0

Kv value is the flow of water in m3/h at a pressure drop across valve of 0.1 MPa,ρ= 1000 kg/m3.


Connection

Model

Condenser side

Liquid side

PWV3/8、PWV3/8G

1/4 flare 7/16"-20UNF nut

3/8" flare

PWV1/2、PWV1/2G

1/4 flare 7/16"-20UNF nut

G1/2

PWV3/4、PWV3/4G

1/4 flare 7/16"-20UNF nut

G3/4

PWV1、PWV1G

1/4 flare 7/16"-20UNF nut

G1




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