Manual Non Rising Stem Gate Valves
CHFIRE NRS Water Gate Valve is also called rotating stem gate valve (also called dark stem wedge gate valve). The valve stem nut is set on the gate. The rotation of the handwheel drives the rotation of the valve stem to lift the gate. Usually there is a trapezoidal thread at the bottom end of the valve stem. The thread on the bottom end of the valve and the guide groove on the disc will rotate the gate. It becomes linear motion, that is, the operating torque is changed to operating thrust.
CHFIRE Manual NRS Gate Valve is installed in the pipeline for closing and opening.
Specification
1) Material
Body: Ductile Iron,QT450
Seal: Ductile Iron,QT450 Cover by NBR
Stem: 2CR13 Stainless Steel
Support: Ductile Iron,QT450
2) Working Pressure: 16 bar
3) End Connections: Flange x Flange
4) Flange: BS4504 / ANSI150LB
5) Size: DN65 thru DN500
6) Valve Type: NRS Gate Valve
7) Media: Water
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