Temperature Responsive Expansion Valves
| Model | Intermediate pressure (Pi) | Operating temperature (tb ) range | Connection | Capillary length |
| (MPa) | (℃) | Inlet×Outlet | (m) | |
| (in.) | ||||
| WTVA WTVB | 0.1 | 50→75 | 1/2×5/8 SAE&ODF | 1.5 |
| 0.2 | 75→85 | |||
| 0.3 | 80→90 | |||
| 0.4 | 85→95 | |||
| 0.5 | 90→101 | |||
| 0.6 | 94→105 | |||
| 0.7 | 100→110 | |||
| 0.8 | 106→115 | |||
| 0.9 | 111→119 |
| Model | Intermediate pressure (Pi) | Operating temperature (tb ) range | Connection | Capillary length |
| (MPa) | (℃) | Inlet×Outlet | (m) | |
| (in.) | ||||
| WTVC | 0.1 | 55→85 | 3/8×1/2 SAE&ODF | 1 |
| 0.2 | 65→90 | |||
| 0.3 | 75→95 | |||
| 0.4 | 85→100 | |||
| 0.5 | 90→110 | |||
| 0.6 | 95→114 | |||
| 0.7 | 101→116 | |||
| 0.8 | 106→119 | |||
| 0.9 | 111→123 |
| Model | Opening temperature (tb) range (℃ ) | Factory setting opening temperature (℃ ) | Connection Inlet×Outlet (in.) | Capillary length (m) |
| WTVA WTVB | 65 ~ 105 | 85 | 1/2×5/8 SAE & ODF | 1.5 |
| WTVC | 75 ~ 120 | 95 | 3/8×1/2 SAE & ODF | 1 |
| Model | Opening temperature (tb) range (℃ ) | Factory setting opening temperature (℃ ) | Connection Inlet×Outlet (in.) | Capillary length (m) |
| WTVP | Stationary type. Liquid injection temperature can be customized. | 3/8×1/2 SAE | 1 | |
Description of Temperature Responsive Expansion Valve
WTV series temperature responsive expansion valves (liquid injection) are usually installed suction side of compressor in refrigeration system to protect the refrigeration system from too high discharge gas or oil temperature.
The capacities of WTVA, WTVB series temperature responsive expansion valve (liquid injection) are large and usually used for large refrigerant system.
WTVP series temperature responsive expansion valve (liquid injection) can work under no influence by suction pressure change, The liqiud injection temperature need to be sent in factory, and no adjusted in using.
Operating Principle of Liquid Injection Valve
When the discharge gas or oil temperature in refrigeration system is too high, the valve will open. Liquid refrigerant will be fed into the suction side and compression cavity after temperature drop yhrough the valve, and then cool the motor coil and the mixture of refrigerant and oil, which makes the liquid refrigerant entering the evaporator in lower temperature.
Technical Data of Temperature Responsive Expansion Valve
Max. working pressure: 3MPa
Max. testing pressure: 3.5MPa
