Valve body: There are two common connection methods: wafer and flange, and common materials are cast iron, ductile iron, cast steel, and stainless steel. Butterfly valves made of stainless steel have the highest cost and are mostly used in industrial pipelines, which can be anti-corrosion, rust-proof, and resistant to high temperature and high pressure; cast iron and ductile iron butterfly valves are mostly used in wading pipelines, low pressure and normal temperature environments; cast steel butterfly valves are mostly used in ordinary industrial pipelines Although the corrosion resistance is not as good as the stainless steel butterfly valve, it can also withstand high temperature and high pressure.
Butterfly disc: The disc material of the centerline butterfly valve and the eccentric butterfly valve is also different. The disc material of the centerline butterfly valve is DI, CF8, CF8M, C954; the disc material of the eccentric butterfly valve is WCB, CF3, CF3M, CF8, CF8M.
Valve shaft: soft sealing butterfly valve shaft materials usually use 45# steel, 420 stainless steel, 304 stainless steel, 316 stainless steel; hard sealing butterfly valve shaft materials are mostly 2Cr13 series stainless steel, 304 stainless steel, 316 stainless steel.
Valve seat: The valve seat of the soft sealing butterfly valve is mainly made of EPDM, NBR nitrile rubber, and PTFE polytetrafluoroethylene; the valve seat of the hard sealing butterfly valve is made of Cr stainless steel, 304 stainless steel, and 316 stainless steel.
Actuator: Commonly used actuator devices for butterfly valves are: handle, worm gear, electric actuator, and pneumatic actuator. The common handles include stamping handles, large iron handles, and aluminum handles; the worm gear head is made of cast iron and stainless steel. Switch type and adjustment type; pneumatic actuators are divided into single-acting and double-acting.
The above is the introduction of Bundor Valve on the components of butterfly valves. Understanding the components of butterfly valves is very helpful for butterfly valve selection. If you have any questions, you can click on the website for online customer service consultation, or send us an email.
