Armatury S43.5 acc.to EN - Gate Valve

Gate Valve.Application Gate valves are isolating valves designed for full closing or opening of working media flow. If the gate valves are used for regulating or throttling purposes, the manufacturer does not guarantee tightness of the gate valves. For regulation we recommend to use special control gate valve type S33.C. Working medium water non-corrosive liquids steam air gases of group 1 and 2 petroleum and petroleum products The service fluids shall not contain rough impurities. Technical description The gate valve is an outside-screw-and-yoke, full bore with flexible wedge and rising stem. The body and the bonnet are made of castings and are connected by a  flanged joint. The seating surfaces of the seats and the wedge are made in compliance with API 600. The seat rings are welded into the body. The gate valves are equipped with a back seat. The gate valves are a bi-directional sealing valves. The body-bonnet joint and the packing chamber are sealed with asbestos-free gasket and packing which guarantee a long life service. The requirement for an automatic body cavity pressure relief shall be specified in the purchase order. Pressure relief can be achieved by: drilling a hole through one disc of the wedge, special valve incorporated into the wedge, external bypass, use of solid wedge. TA-Luft design on request.