Pneumatic high performance double eccentric butterfly valve
DN: DN50-DN800 2’’-32’’
Connection type: Wafer, Flange
Operation: Handle, worm gear, pneumatic, electric
Medium: Water, gas, oil, Acid-base
Standard: GB/T12238-2008 API609
Face to face: GB/T12221 API609
Flange End: GB/T9113 ASME B16.5
Testing and inspection: GB/T13927 API598
1. The working temperature of this pneumatic butterfly valve is ≤250℃, it’s widely used in metallurgy, electric power, petrochemical industry, as well as water supply and drainage of municipal construction and other industrial pipelines. Spherical sealing, floating sealing and eccentric structure make it has long service life.
2. The eccentric design effectively prevents friction between the seat and disc, good sealing performance to achieve zero leakage.
3. The sealing of butterfly valve is surfacing with cobalt-base carbide, it’s corrosive resistant and long service life.
4. This valve has 2-way sealing function, it’s not limited by the medium flow direction and can be installed in any position.
The double eccentric butterfly valve is mainly used in the preheating system and dry dedusting system of blast furnace with larger nominal diameter, lower working pressure and opening / closing pressure difference, and higher temperature (200-350 ℃), It can be used as combustion supporting air shut-off valve, combustion supporting gas cut-off valve, gas inlet and outlet shut-off valve of heat exchanger system, flue gas inlet and outlet shut-off valve of heat exchanger system and gas shut-off valve of dry dedusting system. Double eccentric butterfly valve is gradually improved to adapt to different working conditions (working temperature and working pressure).