Rising-stem Wedge Gate Valve
Rising-stem gate valves are used when it is important to know by immediate inspection whether the valve is open or closed and when the threads (stem and gate) exposed to the fluid could become damaged by fluid contaminants. In this design, the stem rises out of the gate valve when the valve is opened.
The wedge gate of the ZC gate valve provides tight sealing even at low differential pressure. Grooved wedge guided and fitted by body, assures proper and consistent seal regardless of valve position, and also minimizes seat wear and damage, since seating surfaces of the wedge and seat are in contact during less than 5% of the total wedge travel.
Features of Rising-stem Wedge Gate Valves:
Outside screw and yoke
Rising stem and non-rising handwheel
Flexible wedge, fully guided
Renewable seat ring and stem backseat
Manual operation standard, gear operator and actuation available
Butt weld end
Flange end: raised face or ring type joint
Applicable standards of Rising-stem Wedge Gate Valves:
a) Design & Manufacture: API 600, API 6D, BS 1414
b) Face to Face: API 6D, ASME B16.10, EN 558, DIN 3202, BS 2080
c) Connection End: ASME B16.5, ASME B16.25, EN 1092, EN 12627, JIS B2220
d) Test : API 600, API 6D, EN 12266, ISO 5208
Sizes: 2" - 48" or DN50 - DN1200
Pressure Rating: Class 150 - Class 2500 or PN 16 - PN 420
Valve Materials: WCB, LCB, WC6, WC9, C12, C5, CF8, CF8M, Duplex Stainless Steels, etc.
Operated by: Handwheel, Gear, Pneumatic, Hydraulic and Electric actuator
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