lever gate valve Description
Lever-Operated Knife Gate Valve is a knife-shaped gate valve driven by a lever mechanism, designed for the cut-off control of media containing particles, slurry or fibers.
Structural features
Lever drive mechanism
A mechanical lever arm is used to replace the traditional handwheel or gearbox, and the gate is directly driven up and down by manual pressure or counterweight assistance.
Advantages: No exposed screw to avoid thread rust and jam; emergency cut-off speed is more than 3 times faster than the rotary type.
Knife gate design
Bevel blade or V-shaped cut: Can cut fibers and solid particles (such as pulp, slag) to prevent medium jamming.
Sealing mechanism:
Single-sided sealing: Only the bottom of the gate is pressed and sealed with the wedge groove of the valve seat (applicable to one-way media).
Double-sided sealing: The gate has double sealing surfaces on the upper and lower sides, suitable for bidirectional flow or high pressure difference conditions.
Valve body and flow channel
Short structural length: The valve body is compact, 20%-30% shorter than the gate valve of the same diameter, reducing the pipeline load.
Straight-through flow channel: When fully open, the flow resistance is close to that of a straight pipe, preventing slurry deposition.
lever gate valve specification
| Parameter | Range | Applicable scenarios |
|---|---|---|
| Nominal diameter | DN50 – DN1200 | Common DN100-DN600 (sewage treatment main line) |
| Pressure level | PN10 – PN25 | Low-pressure slurry delivery (up to PN40 customized) |
| Temperature range | -20℃ ~ 1000℃ | Normal temperature type (-20~120℃) / High temperature customized type |
| Valve body material | Cast iron, stainless steel 2520 | For corrosive media, choose 316L; for high temperature, choose 2520 |
| Feature | illustrate |
|---|---|
| Strong anti-blocking ability | The blade can cut fibers/particles, suitable for high viscosity media such as pulp and sludge |
| Resistant to extreme conditions | High temperature type uses 2520 alloy, which can withstand 1000℃ (such as metallurgical slag pipelines) |
| Easy to operate | Lever labor-saving design, the opening and closing torque is 50% lower than the handwheel type |
| Low maintenance cost | Simple structure, no need to disassemble the valve body to replace the seal |
| Reliable sealing | Wedge-shaped compression groove + medium pressure double seal, leakage rate ≤ ANSI FCI 70-2 Class VI standard |
lever gate valve
Applications
- Mining and Metallurgy
Slurry Transportation: Cutting slurry containing ore particles (such as tailings pipeline);
High-temperature slag: blast furnace slag valve (1000℃ resistant lever-type high-temperature knife gate valve).
- Environmental Protection and Municipal Administration
Sewage Treatment: Cutting off sludge and sewage main pipes (mainly DN300-DN600);
Waste Incineration: Ash Control Valve (wear-resistant design).
- Papermaking and Chemical Industry
Pulp Pipeline: Cutting off fiber slurry to prevent winding and blockage;
Corrosive Media: Acid and Alkali Liquid Transportation (fluorine-lined or 316L material).
- Energy Industry
Power Plant Ash Removal System: Emergency Cutting Off of Fly Ash Pipeline;
Coal Mine Gas Pipeline: Explosion-proof Electric Lever Gate Valve (ATEX Certified).
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