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Vent Butterfly Valve
Technical Requirement:
- Design & Manufacture: Manufacturer standard
- Face-to-Face: Manufacturer standard
- End Flanges: GB/T 9119 (PN2.5) or per duct drawing
- Inspection & Test: GB/T 13927
Description
The Vent Butterfly Valve is a ventilation (air) butterfly valve for low-pressure air, gas and dust-laden ducts. Its welded or cast body with flanged ends, simple disc and worm gear handwheel allow on/off and regulation of airflow in ventilation and dust-removal systems. The design prioritizes light weight, low cost and easy maintenance for large-volume, low-pressure service.
Technical Specifications:
- Pressure Class: PN0.5 – PN2.5 (0.05 – 0.25 MPa)
- Size Range: DN100 – DN2000
- Applicable Medium: Air, flue gas, dust-laden gas, coal gas
- Operating Temperature: ≤ 200°C (higher with special seal)
Main Parts and Materials:
| Parts Name | Materials |
| Body | Carbon Steel Q235 / Cast Iron |
| Disc | Carbon Steel Q235 |
| Shaft | 45# Steel / 2Cr13 |
| Seal | Non-sealed / Silicone rubber (optional) |
| Packing | Asbestos-free graphite |
Key Product Features:
- Low-Pressure Air Design: Optimized for ventilation and dust systems, not liquid shut-off.
- Airflow Regulation: Disc angle can be set for flow balancing.
- Lightweight Construction: Steel plate body for easy handling in large sizes.
- Worm Gear Handwheel: Smooth, self-locking manual operation; electric actuator available.
- Heat Resistant: Suitable for hot air and flue gas up to 200°C.
Applications:
Ideal for Ventilation Systems, Dust Removal, Cement & Mining Plants, and Power Plant Air Ducts. Specifically suited for controlling large volumes of low-pressure air or gas.
Additional information
| Standard | GB |
|---|
