China Gate Valve

What is Gate valves

Gate valves are widely used for all types of applications and are suitable for both above-ground and underground installation. Not least for underground installations it is paramount to choose the right type of valve to avoid high replacement costs.

Gate valves are used to shut off the flow of liquids rather than for flow regulation. When fully open, the typical gate valve has no obstruction in the flow path, resulting in very low flow resistance. The size of the open flow path generally varies in a nonlinear manner as the gate is moved. This means that the flow rate does not change evenly with stem travel. Depending on the construction, a partially open gate can vibrate from the fluid flow

Gate valves are mostly used with larger pipe diameters (from 2" to the largest pipelines) since they are less complex to construct than other types of valves in large sizes.

Gate Valve Parts

Main gate valve parts of a gate valve are: body, seat, gate, stem, bonnet and actuator. The main operation mechanism is very simple. When the handwheel is turned, it rotates the stem, which is translated into the vertical movement of a gate via threads.

Types of Gate Valves

There are three ways to classify the gate valve.

Types of Disk

Solid taper wedge

Flexible wedge

Split wedge or Parallel disks Valve

Types of Body Bonnet Joint

Screwed Bonnet

Bolted-Bonnet

Welded-Bonnet

Pressure-Seal Bonnet

Types of Stem movement

Rising Stem or OS & Y Type (Outside Stem and Screw Type)

Non-rising Stem type

Gate Valve Applications

Gate valvesare used in almost all fluid services such as air, fuel gas, feedwater, steam, lube oil, hydrocarbon, and all most any services.

Some special gate valve is used in slurry and powder product also such as knife gate valve

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