Gate Valve

Alpha Ind. Tech.


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Gate Valve

A gate valve, also known as a sluice valve, is a valve which opens by lifting a round or rectangular gate/wedge out of the path of the fluid. The distinct feature of a gate valve is the sealing surfaces between the gate and seats are planar, so gate valves are often used when a straight-line flow of fluid and minimum restriction is desired. The gate faces can be parallel, but are most commonly wedge-shaped.

On opening the gate valve, the flow path is enlarged in a highly nonlinear manner with respect to percent of opening. This means that flow rate does not change evenly with stem travel. Most of the flow change occurs near shutoff with a relatively high fluid velocity causing gate and seat wear and eventual leakage if used to regulate flow. Also, a partially open gate tends to vibrate from the fluid flow. Thus, typical gate valves are designed to be fully opened or closed. When fully open, the typical gate valve has no obstruction in the flow path, resulting in very low friction loss.

Alpha's Gate valves include the following types:

1 Manual Knife gate valves    Product model:KZ73X-2.5/6/10/16

2 Pneumatic knife gate valve    Product model: KZ673X-2.5/6/10/16

3 Analog control knife gate valve    Product model: KZ673X-2.5/6/10/16   

4 Electric knife gate valve   Product model: KZ973X-2.5/6/10/16

5 Electric hydraulic knife gate valve   Product model: KZ273X-2.5/6/10/16