Refrigeration valves are specialised components used in refrigeration and air conditioning systems to control the flow, pressure, and direction of refrigerants like R-134a, R-404A, or R-410A. Refrigeration valves ensure the system operates efficiently, safely, and reliably under varying load and temperature conditions.
Common Types of Refrigeration Valves:
| Valve Type | Function | Typical Location |
|---|
| Expansion Valve (TXV/EXV) | Regulates refrigerant flow into the evaporator | Between condenser and evaporator |
| Solenoid Valve | Electrically controls refrigerant flow (on/off) | Liquid lines, hot gas bypass, etc. |
| Check Valve | Prevents backflow of refrigerant | Discharge or liquid lines |
| Ball Valve | Manual shut-off of refrigerant flow | Service or isolation lines |
| Service Valve (King Valve) | For charging, recovery, and system isolation | Compressor or condensing unit |
| Relief Valve | Protects system from overpressure | Compressor discharge, receivers |
| Pressure Regulating Valve (PRV/ORS) | Maintains set pressure in suction or discharge lines | Suction line (evaporator side) |
| Bypass Valve | Redirects refrigerant during defrost or low load | Hot gas bypass or defrost systems |
Refrigeration Valve Key Features:
- Made of brass, stainless steel, or copper
- Designed for hermetic or accessible systems
- Rated for specific pressures and refrigerants
- Often equipped with flare or sweat fittings
- Some are thermostatically or electronically controlled
Refrigeration Valve Applications:
- Commercial refrigeration (walk-ins, supermarket systems)
- HVAC systems (rooftop units, chillers)
- Industrial cooling (process cooling, ice rinks)
- Cold storage and transportation