FIELD: manufacture of fittings. SUBSTANCE: check valve has body with inlet and outlet chambers, seat, and shut-off member pressed to seat by spring. Located on shut-off member is power cylinder whose working chamber is brought into communication with outlet chamber of body through throttling orifice in cylinder and constant volume chamber which is located between power cylinder and tube with ejector attachment. EFFECT: simplified construction; extended functional capabilities of valve. 3 cl, 2 dwg
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