thermal adjustment 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, PTV8 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, Features :1) Exquisite angle design for easy installation. 2) Accurate adjusting pressure. 3) Wide capacity and operating ranges. Technical dataMax. working pressure: 2.5MPaMax. testing pressure: 3MPa Type and data Model Normal capacity (KW) Connection (in.) Adjusting range (MPa) Medium temperature (°C) Max. working pressure (MPa) Max. testing pressure (MPa) R134a R22/R407C R404A/R507 Inlet Outlet PTV8 7 11 7 3/8 SAE 1/2 SAE 0.03→0.6 -25~150 2.5 3 PTV8W 7 11 7 3/8 ODF 1/2 ODF PTV10W 14 22.5 16.2 1/2 ODF 5/8 ODF PTV12W 30 40 25 1/2 ODF 5/8 ODF Notes: 1) Nominal capacity is based on evaporating temperature +5°C, condensing temperature +38 °C. 2) After the model, ”W” indicates solder ODF,”E” indicates external equalization. 3) Factory setting opening pressure is 0.4MPa. Adjust regulation knob at clockwise rotation for one round, opening pressure increases 0.1 MPa, inversely, opening pressure decreases 0.1 MPa.
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