Valve regulators in refrigeration systems
Valves perform a variety of functions in refrigeration systems. They are used for expansion of vapour, regulating flow of water or vapour, pressure and temperature regulation, activating a device, oil level control etc. Depending on the function there are various types of valves available viz. expansion valves, stop & regulating valves, solenoid valves, safety valves, pressure controlled valves, etc.
Valve regulators are used for many different functions in commercial and industrial refrigeration like capacity regulation, condensing pressure regulation, evaporation pressure regulation, receiver pressure regulation, crankcase pressure regulation etc.
Capacity valve regulators adjust compressor capacity to actual evaporator load in applications like air driers and water chillers where the evaporating temperature is around 0 deg C. They maintain compressor suction pressure by injecting hot / cool gas from the higher pressure side. When pressure drops at the outlet these valve regulators open up to achieve pressure regulation.
They are hermetically sealed and made of bimetal as well as stainless steel.
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