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Straight Through Design
The function of a Check Valve is to allow fluid flow in one direction
Henry Technologies’ Check Valves
refrigerants and their associated oils, as well as other industrial fluids non-
corrosive to brass, steel, copper, Teflon and synthetic rubber.
A typical application is to install a Check Valve downstream of an Oil
Separator. This prevents condensed liquid refrigerant returning down the
Discharge Line and into the Separator.
The 119 and 120 series Check Valves are not suitable for discharge lines of
are suitable for use with HCFC and HFC
Flow direction arrow
Quiet and efficient operation
Minimal opening pressure
Copper extensions on 120 series
Maximum working pressure = 500 PSI (34.5 Bar)
Allowable operating temperature = -20°F to +200°F (
Using the standard spring, Henry Technologies’ Check Valves will start to
open at 0.5 PSI and be fully open at 5 PSI pressure differential. Contact
Technical Support at 1(800) 627-5148 for alternative spring options.
Series 119 and 120 Check Valves are USR and CNR recognized by
Underwriters Laboratories, Inc.
-29°C to +93°C)
Materials of Construction
The valve body and piston are made from brass. The spring is made from
stainless steel. The seat is made from neoprene. The extensions on the 120
series are made from copper.
Conn Size (inch)
1/4 SAE Flare
3/8 SAE Flare
1/2 SAE Flare
Installation - Notes
1. Valves must be installed in accordance with the flow direction arrow.
2. The valve bodies and valve internals of series 120 valves must be
protected against damage during brazing. Series 120 valves should not
be disassembled for brazing. Full instructions are given in the Product
Instruction Sheet, included with each valve.
3. Discharge Check Valves should be positioned as far from the compressor