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美國(guó)ALSO艾索閘閥（Gate Valve）

Wedge Gate Valve -> Non-rising Stem Gate Valve
Non-rising stem gate valve is used where vertical space is limited or underground. The stem is threaded into the gate. As the handwheel on the stem is rotated, the gate travels up or down the stem on the threads while the stem remains vertically stationary. This type of valve has a pointer indicator threaded onto the upper end of the stem to indicate the position of the gate.
 
Features of Non-rising Stem Gate Valves:
Non-rising stem and inside stem screwl
Flexible wedge, fully guided
Metal seat and resilient seat available
Renewable seat ring and stem backseat
Manual operation standard, gear operator and actuation available
Flange end: raised face or ring type joint
 
Applicable standards of Non-rising Stem 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, EN 1092, JIS B2220
d) Test : API 600, API 6D, EN 12266

Sizes: 2" - 36" or DN 50 - DN 900
Pressure Rating: Class 150 - Class 900 or PN 16 - PN 150       
Valve Materials: WCB, LCB, WC6, WC9, CF8, CF8M, Cast iron, etc.
Operated by: Handwheel, Gear, Pneumatic, Hydraulic and Electric actuator

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