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There are a few different designs:
Parallel disk gate valves use two disks with a spring in between them, sliding into the seats. At low pressure, the spring forces the disks outward against the seats, sealing off the valve. At high pressure, all the sealing is accomplished by the downstream disk.
Wedge gate valves use a tapered disk that slides into two seats set at a slight, converging angle. The wedging action provides the sealing force between the disk and the seat.
Single disk gate valves are used where the flow is always one way (like sluices on dams). There is some flexibility in the attachment of the disk to the stem, so the differential pressure on the disk pushes it against the seat, sealing it off.
Wiki User
∙ 14y ago
Wiki User
∙ 10y agoDifferent types of valves are used for different types of applications. For example you can use Ball valves for the on/off control without a pressure drop or Butterfly valves if you want to regulate the flow in large pipe diameter. Gate valves could be the best choice for the application where on/off control is needed with a low pressure drop and if your application maintains a variable flow rate through the valve then you oughta consider flow control valves. Read more about Industrial valves and their use at Highvac.com.
Wiki User
∙ 11y agoDifferent types of valves and their function.
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