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PTV series constant pressure expansion valves (hot gas bypass) can adjust compressor capacity and make it match with the load of evaporator.

Placed in a bypass between high and low pressure side of refrigeration system, PTV imposes a lower limit on compressor suction pressure by supplying the low pressure side with replacement capacity in the form of hot or cool gas from high pressure side.

PTV(E)8W-PL and  PTV(E)10W-PL for R410A use.