Non Rising Stem Gate Valve

Buy Non Rising Stem Gate Valve which Can be Customized From Our Factory in China
1.Introduction of Non Rising Stem Gate Valve

Gate valve is a kind of valve for medium connection and shut- off but not suitable for regulating. Compared with other valves, gate valves have a wider range of combined applications for pressure, service fluid, design pressure and temperature. According to the screw position of the stem, the gate valve can be divided into rising stem gate valves and Non Rising Stem Gate Valve .

Non Rising Stem Gate Valve means outside stem, also referred to as the rotary stem gate valve or blind stem wedge gate valve. In an NRS valve, the stem will turn to open and close the gate, but the stem does not move up or down as it turns. As the stem turns, it moves into or out of the valve, which also moves the gate to open or seal the valve.

2.The Advantages and Disadvantages of Non Rising Stem Gate Valve

Non Rising Stem Valves take up less space, ideal for gate valve with limited space. Generally, an open-close indicator should be installed to indicate the degree of open-close.
Failure to lubricate stem threads will result in medium erosion and easy damage.

3.What’s the difference between rising stem gate valve and Non Rising Stem Gate Valve?

1)Appearance: The rising stem gate valve can be seen from the appearance whether the valve is closed or open. The lead screw can be seen while the Non Rising Stem Gate Valve cannot.
2)The ascension screw of rising stem flanged gate valve is exposed outside, the nut cling to the handwheel is fixed (not rotating axial movement), the rotation of the screw and gate only relative motion without relative axial displacement of the disc and stem up and down together. The lifting screw of the non-rising stem flange gate valve only rotates and does not move up and down.

4.Application Of Stainless Steel Knife Gate Valves

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