Product Description    Term: Constant Pressure Expansion Valves (Hot gas bypass)    Introduction:   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 data
Max. working pressure: 2.5MPa
Max. 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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