GATE VALVE

Gate Valves are characterised by a sliding disc or gate which
is moved by the actuator perpendicular to the direction of flow.
There are many variations in seat, stem and bonnet design in
gate valves. They are available in a wide assortment of sizes
and weights.

Gate valves are used primarily as stop valves, i.e., fully open
or fully closed. They are not normally considered for throttling
purpose. They are suited for high pressure and high temperature
use with a wide variety of fluids. They are not usually used for
slurries, viscous fluids etc.

Gate valves usually have a low pressure drop when fully open,
provide a tight seal when fully closed, and are relatively free of
contamination buildup.

Gate valves are prone to vibration when in a partially open
state and are also subject to seat and disc wear. Some large
size gate valves are not recommended for steam service. Gate
valves have slow response charateristics and require large
actuating forces.

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