The gate valve, also known as a sluice valve, is a valve that 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.
Just contact Taiwantrade.
http://www.taiwantrade.com.tw/MAIN/suppliers/gate-valves-manufacturers.html
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