Non Rising Knife Gate Valve

Non Rising Knife Gate Valve

Key Specifications / Features

Non Rising Knife Gate Valve Supplier in China: Non Rising Knife Gate Valve, 2-48 Inch, DN50-DN1200, Class 150 LB, GGG40-A356, CF8-A351, CF8M-A351.
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Detail Information

Knife Gate Valve service industries include: energy, petrochemical, metallurgical, chemical, mining, paper making, environmental protection, biochemical, pharmaceutical, oil, electricity, printing and dyeing, light industry, food, tobacco, sugar, beverage and other fields.

Rate: Class 150 LB.
Size: NPS 2-48 Inch (DN50-DN1200).
Connection: Wafer type, Flange type, Lug type, Welded type.
Seal type: Soft or metal.
Material: GGG40-A356, CF8-A351, CF8M-A351.
Operated type: Handwheel, chainwheel, bevel gear, electric, pneumatic.

1. Valve adopts integral design, with small fluid resistance and flexible operation.
2. The screw drive of manual knife gate valve adopts the design of double plane bearing, which makes the transmission frictional force greatly reduced, so that the valve can be opened easily and easily.
3. Using movable type knife gate valve seal seat seal, and USES the o-ring preloaded with pre-tightening force make the seal seat close to the disc, leakage amount is greatly reduced, wear of sealing pair in the long-term use of automatic compensation function to improve the service life.
4. Fixed guide claw, no groove design, not easy to cause media accumulation or card resistance.
5. The seat can be according to the needs of medium and conditions, choose metal hard seal or soft seal: ram adopt surface chromium plated or ion nitriding treatment, make the ram is more wear-resisting, longer service life of sealing face;Soft seal optional PTFE seat or enhanced PTFE seat or tri-propylene, butyl rubber, good sealing, corrosion resistant.
6. Wide range of media adaptation: good sealing performance and economic practicability, operation can be manual, pneumatic, electric, practical range is very wide.

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FAQs

What is a Non-Rising Stem Gate Valve?

A valve where the stem does not move vertically but rotates internally to raise or lower the gate. This design is ideal for installations with limited vertical space.

How Does a Non-Rising Stem Gate Valve Work?

The handwheel turns the stem, which in turn moves the gate up or down inside the valve body without changing the external height of the stem.

How Does a Rising Stem Gate Valve Work?

The handwheel lifts the stem and gate together, providing a visual indication of whether the valve is open or closed.

Which Valve Should I Choose?

Use a rising stem valve for above-ground applications where visibility and ease of maintenance are important.

Use a non-rising stem valve for underground or space-limited installations.

Conclusion

The choice between rising stem and non-rising stem gate valves depends on your specific application needs. For clear valve status indication and easy maintenance, go with a rising stem valve. For compact installations, a non-rising stem valve is the better option.

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