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Lug butterfly valves are usually made of metal such as ductile iron or steel. They are characterized by threaded threaded lugs located on the valve flange for bolting.

video fuking,Lug butterfly valves are suitable for terminal services, but blind flanges are always recommended. The manufacture of the lug butterfly valve is compatible with pneumatic or electric drive. The disc and seat material should be determined according to the application and flowing medium.

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Most wafer butterfly valves are designed with four holes, aligned with the connecting pipe. The valve is designed to be clamped between two flanges in a pipeline. Most wafer butterfly valves meet most flange standards. The rubber or EPDM valve seat forms a very strong seal between the valve and the flange connection.,ddf busty

Unlike the lug butterfly valve, the wafer butterfly valve cannot be used for pipe end or pipeline end service. If maintenance is required on either side of the valve, the entire line must be shut down. The wafer butterfly valve is manufactured to be compatible with pneumatic or electric drive. The disc and seat material should be determined according to the application and flowing medium.,ref tube

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