FIELD: manufacture of fittings; shutting off the mains in oil, gas and chemical industries. SUBSTANCE: gate valve is provided with rings made from metal subjected to plastic metal working which are located in cast metal body of gate valve between seats and body on one side and between seats and flanges on other side. Outer surface of rings is welded to body and flanges. Seats are arranged inside rings. EFFECT: enhanced reliability. 2 dwg
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