Manufactured by pople industries which are available in the different types; single check valve (sc)- valved coupler and plain adaptor; double check valve (dc)- valved coupler and valved adaptor; and straight through (st)- plain coupler and adaptor. It can be for compressed air, gases, oil, chemicals, fluids, etc. Material of construction: body- ss, brass, carbon steel; ball- ss; sealing- viton, ptfe; spring- ss; temperature- 20 to 180 c ; working pressure- up to 6000 psig; size range- 1/8" to 4"; and end connections- screwed female/male, hose and tube ends.
