Cast Steel Gate Valve

详情

The gate valve, also known as a sluice valve, is a valve that opens by lifting a round or rectangular gate/wedge out of the path of the fluid. The distinct feature of a gate valve is the sealing surfaces between the gate and seats are planar, so gate valves are often used when a straight-line flow of fluid and minimum restric­tion is desired. The gate faces can form a wedge shape or they can be parallel. Gate valves are primarily used to permit or prevent the flow of liquids, but typical gate valves shouldn't be used for regulating flow, unless they are specifically designed for that purpose. Because of their ability to cut through liquids, gate valves are often used in the petroleum industry. On opening the gate valve, the flow path is enlarged in a highly nonlinear manner with respect to percent of opening. This means that flow rate does not change evenly with stem travel. Also, a partially open gate disk tends to vibrate from the fluid flow. Most of the flow change occurs near shutoff with a relatively high fluid velocity causing disk and seat wear and eventual leakage if used to regulate flow. Typical gate valves are designed to be fully opened or closed.[1] When fully open, the typical gate valve has no obstruction in the flow path, resulting in very low friction loss

Design & Manufacture: ANSI B*6.5, B*6.*4, API **0, DIN Std 
OS&Y, Bolted Bonnet 
Solid, Flexible or Split Wedge Design 
Back-seating, Renewable Seat Ring 
Full Port Or Reduced Bore 
Optional Upset forged T-head Stem Design 
Size Range: 2" to *8"N. B. 
Pressure Ratings: ANSI **0 to ***0 
End Connections: Flanged, Buttweld, Socket Weld, Hub Connectors, 
Compact Flange or other proprietary connections. 

Materials Available in: WCB, LCB, CF8, CF8M, CF3, CF3M, WC6, WC9, C5, C*2 or Equivalent, Available also in low temperature steels, low alloy steels, stainless steels, duplex type stainless steels and other exotic materials; Various trim materials available to suit service conditions 
Various trim materials are available to suit different service conditions 

Actuations: Manual, Electric, Hydrau-Pneumatic Actuator 

To MR ***5 and MR **3 on request