Pneumatic Parallel-Slide Gate Valve
Parallel sealing gates provide excellent sealing.
Product overview
This pneumatic parallel-slide gate valve covers the full DN25~DN500 large-size range and multiple pressure classes under Chinese, US and Japanese standards. Multiple body and seat materials are available. Parallel double gates provide excellent bidirectional sealing, while the fully open straight-through passage avoids throttling and gives very low pressure drop. Widely used in large gas, oil, heating 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 on/off and flow regulation, with a built-in handwheel for emergency manual operation. A rigid body, stable pressure containment and durable wear resistance make it a preferred automated shutoff valve for large industrial pipelines.
Core technology and operating parameters
| Model | Pneumatic parallel-slide 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
Pneumatic parallel-slide gate valve, sizes DN25~DN500, for large pipelines
Multiple pressure ratings and flanges compatible with Chinese, US and Japanese standards
WCB and 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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