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December 06, 2019

PVC butterfly valve type and performance

PVC Butterfly Valve have many different types . According to the structure, it can be divided into central line type and eccentric type. According to the connection mode, it has flange type, wafer type and lug type. According to the operation, there are manual, worm drive, electric and pneumatic operation.


Our PVC BUTTERFLY VALVE is wafer, central line type. Generally, size from dn50 to dn200 are hand lever type, and dn200 to dn500 is worm gear drive. Dn50-dn200 is newly developed style. The connection fit DIN PN10, ANSI cl150 and JIS 10K flange standards. The valve body and disc are made of PVC, the valve seat and sealing ring are made of high-quality EPDM rubber, and the valve stem is made of 304 stainless steel as general equipped. The installation platform of Butterfly Valve meet the standard ISO5211, which can directly install the electric and pneumatic actuators directly without bracket.


Our new PVC butterfly valve is industrial class used for industrial field. It is very different from the general PVC butterfly valve for water supply on the market. Our PVC butterfly valve body is thicker, stronger, good pressure bearing and not easy to deform. Our valve seat and seal adopt industrial grade EPDM, which has excellent corrosion resistance and more durable, and improves the service life of the valve seat. Generally, NBR or natural rubber seat and seal material are used in the water supply pvc butterfly valves, which can not be applied to the field of industrial corrosion protection. Our valve stems are all made of 304 or 316 materials, because the sealing performance of the valve seat of any PVC butterfly valve will decline after a certain period of service, resulting in the leakage of medium into the valve stem. If the valve stem is not made of stainless steel, the valve stem will be easy to rust, and the strength decline will cause the valve stem to break. So PVC butterfly valves have much difference between industrial use and water supply.
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