What is a Gate Valve?


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What is a Gate Valve ?

A gate valve is a linear motion valve used to start or stop fluid flow. The name gate is derived from the appearance of the disk in the flow stream.

The disk of a gate valve is completely removed from the flow stream when the valve is fully open.When the valve is fully closed, a disk-to-seal ring contact surface exists for 360 degree.With the proper mating of a disk to the seal ring, very little or no leakage occurs across the disk when the gate valve is closed.

A gate valve can be used for a wide variety of fluids and provides a tight seal when closed.

Major disadvantages of a gate valve

  • It is not suitable for throttling applications.
  • It is prone to vibration in the partially open state.
  • It is more subject to seat and disk wear than a globe valve.
  • Repairs, such as lapping and grinding, are generally more difficult to accomplish.