DN50–DN1000 Pneumatic Knife Gate Valve with Air Cylinder Actuator
DN50–DN1000 Pneumatic Knife Gate Valve with Air Cylinder Actuator
FLEYENDA DN50–DN1000 pneumatic knife gate valves are designed for reliable shut-off and flow control in slurry, wastewater, mining, pulp & paper, and chemical applications. Equipped with a fast-response air cylinder actuator, the valve provides stable pneumatic automation and efficient operation under demanding industrial conditions. Available in multiple body materials and sealing options, these pneumatic knife gate valves ensure long service life, corrosion resistance, and low maintenance costs for industrial pipeline systems.
Technical Specifications
DN50–DN1000 Pneumatic Knife Gate Valve with Air Cylinder Actuator
| Size Range | DN15 to DN1000 (1/2″ to 40″) |
| Body Material | Cast Iron, Carbon Steel(WCB), Stainless Steel(CF8, CF8M) |
| Disc Material | WCB、Cast Iron, Stainless Steel(CF8, CF8M) |
| Stem Material | Stainless Steel (CF8, CF8M) |
| Sealing Material | PTFE |
| Connection Type | Flanged Type, Lug Type, Wafer Type (GB/ANSI/JIS/DIN) |
| Pressure Rating | 300PSI |
| Temperature Of Medium | -30°C to 300°C (-86°F to 572°F) |
| Optional Accessories | Solenoid Valve, Positioner, Limit Switch, F.R.L., Manual Device |
| Applicable Medium | Mud, Material, Viscous, Granular Fluid |
| Applications | Wastewater Treatment, Mining, Pulp & Paper, Chemical Processing, etc |
| Series | AT | AW | Linear | Pneumatic Cylinder | Sanitary |
|---|---|---|---|---|---|
| Valve Body | Ball valve, butterfly valve, plug valve | Gate valve, Global valve | Knife gate valve | Sanitary butterfly valve | |
| Function | Double Acting, Single Acting (Failure Resetting FO or FC) | ||||
| Control Accessories | • Solenoid Valve, Filter Regulator Lubricator (F.R.L.), Positioner, Limit Switch, Handwheel • Solenoid Valve & Positioner are with Explosion-proof grade and Signal Feedback type for choice |
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| Operating Medium | Clean and dry or lubricated air or inert gas. Any non-corrosive gas that is compatible with the internal parts of the actuator and the lubricant. The dew point temperature of the operating medium is -20°C, and the size of impurity particles is no more than 30u. When selecting a positioner, the impurity particle size should be no more than 5u. |
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| Air Source Pressure | 3bar to 8bar | ||||
| Operating Environment Temperature | • Standard type: -20°C to +80°C • Low-temperature type: -40°C to +80°C • High-temperature type: -20°C to +160°C |
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| Lubrication | Under normal operating conditions, the standard type does not require additional lubricant. For low-temperature or high-temperature environments, special lubricants are required. |
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Product Benefits & Features
1. Reliable Performance for Slurry & Solid Media
Knife gate valve structure provides efficient shut-off for slurry, powder, and particle-containing media
Smooth flow channel reduces blockage and media accumulation
Stable sealing performance under frequent opening and closing conditions
Suitable for mining, wastewater, pulp & paper, and chemical industries
2. Pneumatic Air Cylinder for Fast Operation
Pneumatic air cylinder actuator enables quick and responsive valve operation
Suitable for high-frequency industrial automation systems
Stable pneumatic control improves operational efficiency and reliability
Optional accessories available for remote and intelligent control integration
3. Wide Size Range & Durable Material Options
Available in DN50–DN1000 size range for various industrial pipeline systems
Valve body options include cast iron, carbon steel, and stainless steel
PTFE / EPDM sealing materials ensure corrosion and wear resistance
Compatible with GB / ANSI / DIN / JIS standards
4. Compact Design & Easy Maintenance
Simple and compact structure reduces installation space requirements
Easy disassembly design improves maintenance efficiency
Low wear structure extends valve service life
Reduced maintenance frequency lowers operating costs and downtime
Why Choose Fleyenda Valve Manufacturing
Product Stability
We use reinforced structures and precision sealing to ensure consistent performance under pressure and temperature changes.
Conpany&Product Certification
We have CE, RoHS, ISO, SIL, TUV, and IP68 waterproof certifications covering safety, quality, and environmental standards.
Projects Experience
Cooperated over 40 countries, we have experience in oil & gas, energy, water, chemicals, food & beverage, and automation.
Customization Capability
With 20 years experience, we turn complex working conditions into precise valve solutions with high speed and accuracy.
Aftersales Support
•We have technical team provides real-time video support to help customers resolve on-site issues quickly.
Customer Cases
Trusted by Shell plc, Petronas, Chevron, TotalEnergies, and Dupont in projects across 40+ countries.
Our Product Actual Export Pictures
FAQs That 80% Users Interest
1. What media are pneumatic knife gate valves suitable for?
Pneumatic knife gate valves are ideal for slurry, wastewater, powder, pulp, mining tailings, and other media containing particles or high viscosity. They are widely used in mining, wastewater treatment, pulp & paper, chemical, and industrial processing systems.
2. What actuator options are available for the pneumatic knife gate valve?
The valve can be equipped with different pneumatic actuator configurations, including double-acting and single-acting air cylinder actuators. Optional accessories such as solenoid valves, limit switches, air filters, and positioners are also available for automated control systems.
3. What materials are available for the valve body and sealing?
Valve body materials commonly include cast iron, carbon steel (WCB), and stainless steel (CF8/CF8M). Sealing materials such as PTFE and EPDM are available to meet different temperature, corrosion, and media requirements.
4. What standards and connection types are supported?
The pneumatic knife gate valve supports GB, ANSI, DIN, and JIS standards. Wafer and flanged connection types are available to suit different industrial pipeline installation requirements.