Information about Gate Valves

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About Gate Valves

Gate valves (also known as knife valves or slide valves) are linear motion valves in which a flat closure element slides into the flow stream to provide shut-off. Gate valves and knife valves are designed to minimize pressure drop across the valve in the fully opened position and stop the flow of fluid completely. The direction of fluid flow does not change, and the diameter through which the process fluid passes is essentially equal to that of the pipe. Hence, they tend to have minimal pressure drop when opened fully.

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Butterfly Valves

Butterfly valves control flow through a circular disc or vane by turning the valve's pivot axis at right angles to the direction of flow in the pipe. They are normally used as throttling valves to control flow.

Check Valves

Check valves are self-activating safety valves that permit gases and liquids to flow in only one direction, preventing process flow from reversing. They are classified as one-way directional valves.

Globe Valves

Globe valves are linear motion valves with rounded bodies, from which their name is derived. They are widely used in industry to regulate fluid flow in both on/off and throttling service.

Needle Valves

Needle valves are small valves used for flow control in liquid or gas services. The fine threading of the stem and the large seat area allow for precise resistance to flow.

Pinch Valves

Pinch valves include any valve with a flexible elastomer body that can be pinched closed, cutting off flow, using a mechanism or fluid pressure.

Solenoid Valves

Solenoid valves are devices that use a solenoid to control valve activation.

Solids Valves

Solids valves are used to control or regulate the flow of powder, granular and other bulk solid materials along a process line, or to and from process units, storage bins, conveyors and product packaging.

Engineering Web: Gate Valves - Machine Design

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Fluid Transfer Valves \| Machine Design Gate valves include wedge and double-disc valves.
Cryogenic Solenoid Valves \| Machine Design SV91 valves use a shear-seal design ? a gate-type configuration for optimal flow rate with minimum turbulence.
Mechanical Monthly To make sure all the torque goes into turning valves, the stem on the MT operator is shouldered in the drive sleeve.

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