Pneumatic Knife Gate Valve

Pneumatic Knife Gate Valve is designed for fast, automated isolation and reliable flow interruption in lines carrying heavy slurries, suspended solids, wastewater, and fibrous media. Powered by a linear pneumatic cylinder actuator, this valve utilizes plant air pressure to deliver rapid cycling and high cutting force, slicing cleanly through thick media to ensure tight shut-off.

Featuring a narrow, space-saving wafer, lug, or flanged body profile, the pneumatic knife gate valve eliminates media accumulation in the valve chest. Its automated air cylinder enables effortless local or remote control, making it a critical component for high-frequency cycling and emergency shut-off in modern automated plants. Widely used across mining, municipal wastewater treatment, pulp and paper, power generation, and bulk handling industries, it delivers continuous operation with low maintenance overhead.

Key Features

• Rapid Linear Air Actuation: High-performance pneumatic cylinder (double or single-acting) ensures quick response times and smooth quarter-inch to multi-inch stroke travel.

• Self-Cleaning Knife Blade: Precision-ground, beveled stainless steel gate cuts through scaling, sludge, and fibrous materials without jamming.

• Compact Footprint: Ultra-short face-to-face dimensions save valuable line space and allow easy installation in tight manifold configurations.

• Bi-Directional or Uni-Directional Sealing: Flexible seating options, including resilient soft seats for zero-leakage or metal seats for abrasive/high-temperature lines.

• Automation Ready: Factory-fitted with solenoid valves, limit switch boxes, and air filter regulators for plug-and-play integration into DCS/PLC networks.

Brands We Provide

• EMERSON

• SVR GLOBAL

• FLOWORK

• NEWAY

• GCC VALVES

Applications

• Municipal & Industrial Wastewater Lines

• Mining Tailings & Slurry Transport

• Pulp & Paper Processing (Stock Lines)

• Power Plant Fly Ash & Coal Handling

• Chemical Processing & Process Waste

• Dry Bulk Material & Powder Handling

Benefits

• Fast Emergency Response: Pneumatic power allows rapid open/close speeds compared to motorized alternatives.

• Reduced Line Clogging: Bottom-clearing gate geometry prevents media buildup and packing area contamination.

• Cost-Effective Automation: Utilizes existing plant compressed air infrastructure for lower initial equipment investment.

• Fail-Safe Operation: Can be easily outfitted with spring-return actuators or air receivers for automatic fail-open or fail-close positions on power loss.

Our Pneumatic Knife Gate Valves at AustraliaValves.com are manufactured to rigorous international standards, offering custom body materials, gate coatings, and pneumatic control packages tailored to Australia’s tough industrial sectors.

For engineering assistance, cylinder sizing, or to request a quote, please contact us.