As one of the leading handle wafer butterfly valve,Website: , resilient seat lug butterfly valve, ductile iron wafer butterfly valve, lugged wafer butterfly valve, wafer universal butterfly valve, cast iron wafer butterfly valve manufacturers and suppliers in China and equipped with a productive factory, Shanghai Hugo Valve Co.,Ltd is always at your service. Handle wafer butterfly valve Description 1, Wafer / lug butterfly valve is easy to operate, have good flow control characteristics, only need to rotate to 90℃ can the valve be open or closed.  2, wafer / lug butterfly valve should be horizontal installed on the pipeline. 3, wafer/ lug butterfly valve’s seat material use rubber such as NBR,EPDM,PTFE,VITON etc to reach sealing, because of this structure feature, rubber seat wafer butterfly valve is not suitable for high pressure, high temperature, anti-corrosion and abrasion resistance industry. 4, disc types : With-pin, One stem no-pin, Double stem no-pin Valve materials of construction Body Materials: Cast Iron, Ductile Iron Seat Materials: NBR, EPDM, VITON, PTFE Disc Materials: Ductile Iron, CF8,CF8M, Al-bronze C95800 Stem Materials: SS416, SS304, SS316 Handle material : Iron or steel Applicable standard  Size Range: 2~8"(DN50~DN200） Pressure: PN10, PN16, Class125, Class 150 Standard : ANSI,DIN,JIS  End Connection: Wafer,lug Operate: Manual, but Worm gear, Pneumatic and Electric actuator operation is available