PVC butterfly valve is a kind of valve that opens, closes, or regulates the flow of medium by means of reciprocal rotation of disc type opening and closing member about 90°.
Butterfly valve structure single, small volume, easy to install, suitable for large diameter valves. Minimum opening and closing torque, small fluid resistance, flexible and labor-saving operation. Good sealing performance at low pressure, good regulating ability, when fully open, the effective flow area of the valve seat channel is larger and the fluid resistance is smaller. The sealing surface material is generally rubber and plastic, so the low pressure sealing performance is good.
1、Smaller working pressure and temperature range.
2、The sealing performance is poor.
3、Installation needs to be installed on the pipe together with the flange.
Butterfly valve can be divided into offset plate type, vertical plate type, inclined plate type, and lever type according to the structure form.
According to the sealing, the form can be soft seal type and hard seal type two. Soft seal type generally uses rubber ring seal, hard seal type usually uses metal ring seal.
According to the connection type, it can be divided into flange connection and buttress connection; according to the transmission mode, it can be divided into manual, gear transmission, pneumatic, hydraulic, and electric.