Gate Valves Standard:API,DIN,JIS,GB,API600,API602,ANSI. Material: Stainless Steel, Carbon Steel, Brass, Bronze, Alloy Steel, Titanium, 904l, Ductile Iron,CastIron,ForgedSteel,CastSteel. Size:1/2"~48",DN15~DN1400. Pressure:150LB~2500LB,PN10~PN420. Type: Knife, Slab, Threaded, Bellow Sealed, Pressure Dsealed, Resilient Seated, Flanged, Steam Jacketed, Cryogenic, Low Temperature, Motorized, Pneumatic. Gate valves are utilized whenever a straight-line flow of fluid and minimum restriction is preferred. Gate valves are extremely named since the part that either stops or enables flow with the valve functions somewhat such as the opening or closing of the gate and it is known as, appropriately, the gate. The gate is generally wedge formed. Once the valve is available, the gate is fully attracted up in to the valve, departing a dent for flow with the valve exactly the same size because the pipe where the valve is installed. Therefore, there's little pressure drop or flow restriction with the valve. Gate valves aren't appropriate for throttling purposes because the charge of flow could be difficult because of valve design because the flow of fluid slapping against a partly open gate may cause extensive harm to the valve. Except as particularly approved, gate valves shouldn't be employed for throttling. Gate Valve Gate valves are called either RISING STEM or NONRISING STEM valves. Around the nonrising-stem gate valve, the stem is threaded around the lower finish in to the gate. Because the handwheel around the stem is rotated, the gate travels up or lower the stem around the threads, as the stem remains vertically stationary. This kind of valve more often than not includes a pointer-type indicator threaded to the upper finish from the stem to point valve position.