Valve

The center of rotation of the butterfly plate of the flange butterfly valve (ie the center of the valve stem) is located on the center line of the valve body and the sealing surface section of the butterfly plate. The valve seat is made of synthetic rubber. When closed, the outer circular sealing surface of the butterfly plate squeezes the synthetic rubber valve seat, which makes the valve seat elastically deformed and forms an elastic force as the sealing pressure to ensure the sealing of the butterfly valve. Well-known domestic manufacturers include Shanghai Quangong Valve Equipment Co., Ltd. and Hunan Xinxing Hydropower Equipment Co., Ltd. Its company is a designated management and production enterprise by the Ministry of Machinery Industry, the Ministry of Chemical Industry, and China National Chemical Equipment Corporation. Its products have certain price advantages and technical advantages in the industry.

The driving mode of the lug butterfly valve can be manual, worm gear, pneumatic, electric, hydraulic. The connection method can choose flange and wafer, the structure can choose single eccentric, center line, double eccentric, triple eccentric, and the sealing structure can choose soft seal or hard seal. The pressure range is PN0.1-10Mpa, the nominal diameter is DN40～2000mm, and the material can be cast steel or stainless steel. Due to the wide range of use of valves, the same valve has different combinations in different occasions and working conditions.

The butterfly valve plate of the wafer type butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical passage of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, and the rotation angle is between 0°-90°. When the rotation reaches 90°, the valve is fully opened. This valve is generally installed horizontally. The wafer butterfly valve is simple in structure, small in size and light in weight, and consists of only a few parts. Moreover, it can be opened and closed quickly by rotating 90°, and the operation is simple. At the same time, the valve has good fluid control characteristics.

This Wafer Type Dual Plate Check Valve is expertly engineered to efficiently prevent medium backflow in industrial pipeline systems. It features an advanced dual-plate and internal spring-loaded mechanism: the plates open automatically with forward fluid pressure and are instantly forced closed by the springs when flow stops or reverses. This rapid closure effectively minimizes water hammer and protects downstream pumps and equipment. Compared to traditional flanged check valves, its compact and lightweight wafer design significantly reduces installation footprint and allows for both horizontal and vertical mounting. Available in Cast Iron, Ductile Iron, Stainless Steel, and Bronze with NBR or EPDM seats, it is widely utilized in water supply, fire protection, shipbuilding, and water treatment applications to ensure safe network operation.

Our PTFE Lined Butterfly Valve is a quarter-turn rotary valve that achieves on-off and throttling control of fluid media by rotating the disc 90 degrees. The entire internal wetted surface of the valve—including the valve body, disc, and seat—is fully lined with high-quality PTFE (Polytetrafluoroethylene), a synthetic fluoropolymer renowned for its exceptional chemical inertness, low friction coefficient, and wide temperature adaptability. This full-lining design ensures that no metal components come into direct contact with the process medium, maximizing corrosion protection and preventing medium contamination, while the streamlined disc structure minimizes fluid resistance and improves flow capacity.