Product Model: D641W 

Nominal Diameter: DN100～300mm 

Nominal Pressure: PN0.05～0.6MPa 

Applicable Temperature: ≤425℃ 

Main Material: Carbon steel, Stainless steel

Product Overview
The ventilation butterfly valve opens and closes by rotating the disc using a manual lever mechanism or an electric actuator, thereby reducing the air supply to the blast furnace and discharging excess gas into the atmosphere without stopping the fan. It features short structural dimensions, light weight, and easy installation. The valve has low driving torque, flexible opening and closing, and convenient operation. A sealing retaining ring is provided on the valve body. There is no visible gap between the sealing pairs, resulting in a low leakage rate. The expansion clearance between the disc and the valve body is large, which can effectively prevent jamming caused by thermal expansion and contraction. This valve can be equipped with various driving devices, such as manual devices, worm gear drives, pneumatic actuators, and electric actuators.

Product Features

1. This valve is manufactured by steel plate welding, featuring short structural dimensions, small volume, light weight, and easy installation.

2. The valve has low driving torque, flexible opening and closing, and convenient and reliable operation.

3. A sealing retaining ring is set on the valve body, with no visible gap in the seal and a low leakage rate.

4. The expansion clearance between the disc and the valve body is large, which effectively prevents jamming caused by thermal expansion and contraction.

5. The valve can be equipped with various driving devices, such as manual, electric, pneumatic, and push rod devices.

6. The valve core can be made in double-door or louver types to meet different user needs.

Product Applications
The ventilation butterfly valve is a non-airtight butterfly valve, widely used in building materials, petroleum, metallurgy, mining, power, and other production industries. It is suitable for pipelines with a medium temperature ≤ 425°C and a nominal pressure of 0.1 MPa, for ventilation and medium flow regulation.