Fully lined butterfly valve is the valve plate and valve body lined. (inside is connected to the pipeline, the outside is WCB or SUS304, lined with glue on the inner wall, used for places with high corrosion.
Half-liner butterfly valves are only lined only for the valve plate, or only the valve body. (For places where corrosivity is not very high and there is no accumulation of impurities.
Rubber lined butterfly valve material selection:
1.Rubber seal butterfly valve sealing surface material code J, rubber X, fluorine plastic F.
2.The plastic rubber butterfly valve with rubber seat should be selected: nitrile rubber, ethylene propylene.