Pneumatic Flanged Gate Valve
Flanged gate valve.
Product overview
This pneumatic flanged gate valve covers large sizes DN25~DN500 and multiple pressure classes under Chinese, US and Japanese standards. Different body and seat materials are available. Fully open, the straight-through passage avoids throttling and offers low resistance and pressure loss. Widely used in industrial gas, heating, oil and water-treatment pipelines.
Available with double-acting and single-acting spring-return pneumatic actuators; the single-acting version returns automatically on air loss. It supports shutoff and precise flow regulation, with a standard handwheel for emergency manual operation. A robust body, excellent pressure containment and simple maintenance make it a mainstream choice for automated on/off control in large pipelines.
Core technology and operating parameters
| Model | Pneumatic flanged gate valve |
| Nominal size | DN25~500 mm |
| Pressure | 1.6, 2.5, 4.0 (MPa); 125LB, 150LB, 300LB; 10K |
| Dimensional standards | Chinese, US, Japanese standards |
| Body material | WCB, stainless steel (304, 316), other |
| Seat material | polytetrafluoroethylene (F), stainless steel (H), hard alloy (Y) |
| Action type | Double-acting, single-acting (spring-return) |
| Control mode | Two-position shutoff (on/off), modulating |
| Accessory options | Solenoid valve, valve positioner, limit switch, three-piece air preparation unit (FRL), manual override |
Core construction and design advantages
Sizes DN25~DN500 for large industrial pipelines
Multiple pressure ratings and flanges compatible with Chinese, US and Japanese standards
WCB carbon steel or 304/316 stainless steel body options
Three seat materials for corrosive, clean-water, high-temperature and abrasive service
Parallel double gates with strong bidirectional sealing
Straight-through passage minimizes pressure loss when fully open
Double-acting and single-acting spring-return pneumatic drives
Supports two-position shutoff and flow regulation
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