FD941W square and rectangular square and rectangular electric butterfly valve pneumatic FD641W FD341W-1 hand side of the rectangular valve structure characteristics and uses: FD941W-1 side of the rectangular electric butterfly valve is made of high quality alloy steel welding with small size, light weight, wear-resistant, long life, resistance a small section of a large circulation, hoist flexible. The valves are widely used in metallurgy, building materials, petrochemicals, light industry pipeline, the gas flow rate of the medium, semi-liquid, gas-containing dust carried off, the automatic adjustment or remote control. The main performance Nominal: 0.1MPa Power supply voltage: 220V or 380V · AV Applicable temperature: ≤ 300 ℃ Gas source: 0.5MPa leakage rate: Normal <3%; low leakage type <1% of the input signal :0-10 (4 - 20) mA · DC or switch signals Medium: copies coal, gas, air, gas and other gases