Pneumatic flange gate valves are characterized by reliable performance, convenient operation and maintenance, and are widely used in the petroleum, chemical, and maritime industries for controlling various media. Equipped with both pneumatic and manual mechanisms, the gate valve actuator utilizes a double-cylinder structure, doubling the lifting force compared to single-cylinder pneumatic gate valves. This solves the problem of some valve plates wedging into the valve body and failing to open in single-cylinder pneumatic gate valves.
A buffer mechanism effectively reduces wear on the valve plate and valve body sealing surfaces caused by the piston's downward impact during valve closure, while also preventing gate jamming. Pneumatic flange gate valves can be equipped with electric or pneumatic feedback devices to transmit valve opening and closing status information, enabling remote, centralized, and automatic control.
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Pneumatic flange gate valve Technical parameters
Size Range: DN50–DN800
Pressure Range: PN16–PN40
End Connection: Flanged
Material: Carbon Steel, Stainless Steel, Alloy Steel
Seals: Metal-to-Metal or Soft Seal
Valves Design: Pneumatic Actuated Gate Valve with Rising Stem
Face to Face: API 600 / ISO 5752 Standards
End Connection: ASME B16.5 or EN 1092-1
Testing & Inspection: API 598, ISO 5208
Suitable Medium: Steam, Gas, Oil, Water, Chemical Fluids
Features of Pneumatic Flanged Gate Valves:
(1) High-quality materials are selected, conforming to relevant domestic and international standards.
(2) Meets the requirements of advanced domestic and international standards, ensuring reliable sealing, excellent performance, and aesthetically pleasing design.
(3) Advanced and reasonable sealing pairing: the sealing surfaces of the gate and valve seat are welded together using Stellite cobalt-based hard alloys of varying hardness, resulting in reliable sealing, high hardness, wear resistance, high temperature resistance, corrosion resistance, good scratch resistance, and long service life.
(4) The valve stem undergoes tempering and surface nitriding treatment, providing excellent corrosion resistance, scratch resistance, and wear resistance.
(5) Employs a wedge-type elastic gate structure, with thrust bearings for medium and large diameters, minimizing friction. It also features an impact manual control for easy and smooth opening and closing.
(6) Can adopt various piping flange standards and flange sealing surface forms to meet diverse engineering needs and user requirements.
Pneumatic flange gate valve Main component materials
| Part Name | Material |
|---|---|
| Valve Body, Valve Cover, Valve Plate | Cast Steel |
| Sealing Surface of Valve Body and Gate | Alloy Steel |
| Valve Stem | Stainless Steel |
| Double-ended Bolt | 35# Steel |
| Cylinder | 20# Seamless Steel Pipe |
| Piston | Cast Aluminum Alloy |
| Manual Nut | Bronze |
| Sealing Ring | Asbestos Rubber Sheet, Spiral Wound Metal Graphite Gasket |
| Piston Ring and Shaft Ring | Oil-resistant Rubber Type |
| Stuffing Box | Graphite Asbestos Rope |
Pneumatic flange gate valve Applications:
- Petrochemical Industry: Used to control the flow rate of media in oil and gas pipelines, ensuring the safety and stability of the production process.
- Chemical Production: Used to control the flow rate of various chemical raw materials and products, achieving precise batching and mixing.
- Power Industry: Used for valve control in hydroelectric power plants, achieving precise regulation of water flow; in thermal power plants, controlling boiler feedwater and drainage processes.
- Metallurgical Industry: Used to control the flow rate of media in equipment such as blast furnaces and converters, ensuring the smooth operation of the smelting process.
- Pharmaceutical and Food Industry: Used to control the flow rate of raw materials and products, ensuring the hygiene and safety of the production process.
- Paper Industry: Used to control the flow rate of media such as pulp and water, ensuring the stable operation of the production line.
Pneumatic flange gate valve factory
