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Flue butterfly valve

煙道蝶閥

Product Overview

The flue butterfly valve is used as a regulation on the high-temperature catalytic flue gas, the diameter can reach DN2900, and the high temperature reaches 900 °C.

Product design features

The four-rod type offset connecting rod design can prevent the radial size of the sealing surface of the butterfly plate from being heated and expanded due to the increase in temperature, resulting in the jamming phenomenon between the butterfly plate and the valve body, which effectively solves the problem of high-temperature thermal expansion bite of the butterfly valve;
The valve stem internals are made of high-temperature alloy steel, high-strength design, and the surface of the valve stem is surfacing cemented carbide, which is corrosion resistant, anti-scratch and anti-blowout;
The stem shaft sleeve is designed with a purge hole to prevent solid catalyst particles from entering the gap between the stem and the valve body;
Special design according to user requirements

Product range

Nominal diameter: 2"~116" (DN50~DN2900)
Pressure level: PN6~PN25
Connection form: clamp type, lug type, double flange type, butt welding type
Body material: stainless steel, alloy steel
Sealing material: stainless steel ring
Operation mode: gearbox, electric, pneumatic

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