1.Structure of Gate Valve Description：

A 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. For extremely thick fluids, a specialty valve often known as a knife valve is used to cut through the liquid. 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.When fully open, the typical gate valve has no obstruction in the flow path, resulting in very low friction loss.

2. Main Features of the Gate Valve：

• Valve body cavity using non-toxic epoxy resin,both inside and outside flashboard completely is coated with rubber

•  Free of water pollution

• High manufacturing accuracy

• High strength

• Environmental protection and energy saving

• Good visual effect

3. Images

4. Gate valve Specification

» Sizes Ranges from 1 1/2” thru 60”

» Pressure Ratings from Class 150 to Class 1500, PN16 to PN260

» Structured in Bolted Cover, Outside Screw and York, Optional Non-rising Stem

» Ends Connections in Flanged R.F or RTJ, Butt-welded and Grooved

» Body Materials available in Carbon Steel A216 WCB, WCC, Low Carbon Steel LCB, LCC, Alloy Steel A217 WC6, WC9,  Stainless Steel A351 CF3, CF8, CF3M, CF8M, Duplex & Super Duplex Steel A890 GR. 4A, GR. 5A, Special Materials in Monel, Alu. Bronze C95800, 95600 etc.

» Trim Materials available in 13%Cr, F11, F22, SS304, SS304L, SS316, SS316L and other specials

» Actuations can be equipped with Handwheel, Gear Devices, Electric / Pneumatic or Hydraulic Actuators

» Optional Bypass system, Live Loading Packing & O-ring Seal available upon request.

5.FAQ

1. What's are the characteristics of gate valve?

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. 

2. What is the work principle of gate valve ？

 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. 

3.  What is the structure?

Bonnets provide leakproof closure for the valve body. Gate valves may have a screw-in, union, or bolted bonnet. Screw-in bonnet is the simplest, offering a durable, pressure-tight seal. Union bonnet is suitable for applications requiring frequent inspection and cleaning. It also gives the body added strength. Bolted bonnet is used for larger valves and higher pressure applications.