PZ673H Pneumatic Knife Gate Valve – High-Speed Isolation Valve for Automated Control
The PZ673H pneumatic knife gate valve is a sophisticated automated control instrument designed for rapid shut-off or opening applications. Composed of a pneumatic actuator and a knife gate valve body, it integrates various pneumatic control components to enable remote automated operation. This valve is widely used in pipelines handling granular media in industries such as mining, metallurgy, papermaking, and chemical processing.The main gate valves product names of China gate Valve Network include:API Pneumatic Lug&wafer Knife-shaped Gate Valve,API Cryogenic Gate Valve,API Flange Gate Valve,Bevel Gear Slurry ValveElectric Rising Stem Double Disc Parallel Gate Valve,Electric Non-rising Stem Single Disc Wedge Gate Valve,Electric Rising Stem Single Disc Wedge Gate Valve,Electric Wafer Knife-shaped Gate Valve,Electro-hydraulic Wafer Knife-shaped Gate Valve
Featuring a sharp-edged gate design, the valve offers excellent cutting capability, reliable sealing, and low flow resistance. The pneumatic actuator is available in two configurations:
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Double-acting pneumatic knife gate valve: Operates the valve open and close via air pressure, suitable for standard on-off control.
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Single-acting pneumatic knife gate valve (spring return): Automatically returns the valve to a preset position (open or close) upon electrical or pneumatic failure, ensuring system safety.
Key Features
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Compact structure, minimal installation space
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Sharp gate edge effectively cuts through granular media
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Wear-resistant sealing surfaces extend service life
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Fast pneumatic actuator response for frequent cycling
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Multiple accessory options for diverse control requirements
Technical Specifications
| Nominal Size DN | Height H (mm) | Nominal Size DN | Height H (mm) |
|---|---|---|---|
| 50 | 335 | 250 | 900 |
| 65 | 363 | 300 | 1125 |
| 80 | 395 | 350 | 1260 |
| 100 | 465 | 400 | 1450 |
| 125 | 530 | 450 | 1600 |
| 150 | 630 | 500 | 1900 |
| 200 | 750 | 600 | 2300 |
Note: Heights listed are standard; custom dimensions available upon request. Consult factory for other pressure ratings or end connections.
Optional Accessories
To meet varied automation needs, the PZ673H pneumatic knife gate valve can be equipped with:
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Solenoid Valve: Single or double coil, available in 24V DC, 220V AC, and explosion-proof versions.
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Proximity Switches: For remote position indication and status monitoring.
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Air Preparation Unit (FRL): Includes filter, regulator, and lubricator to ensure clean, stable air supply.
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Electro-Pneumatic Positioner: Enables proportional control via 4-20mA signal for modulating applications.
Typical Applications
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Mining tailings handling systems
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Pulp and paper stock lines
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Chemical processes with suspended solids
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Wastewater treatment sludge pipelines
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Power plant ash handling systems
Maintenance Guidelines
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Regularly inspect the FRL unit; drain condensate and replenish lubricant.
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Cycle the valve 1-2 times per month to prevent seat sticking.
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If internal leakage occurs, check sealing surfaces for wear or debris.
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For slow actuator response, verify air supply pressure and solenoid valve function.
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