Classification of fluorine lined butterfly valves according to six different forms

1. Classified by structural form (1) Sealing butterfly valve (2) Single eccentric sealing coal valve (3) Double eccentric sealing butterfly valve (4) Three eccentric sealing stamp valve

2. Classification by sealing surface material (1) Soft sealed butterfly valves. (2) The sealing pair is composed of non-metallic soft materials to non-metallic soft materials. The sealing pair is composed of metal hard materials and non-metallic soft materials. (3) Metal hard sealed butterfly valve. The sealing pair is composed of metal hard materials against metal hard materials.

3. Fluorine lined butterfly valves are classified according to sealing forms (1) Elastic sealed butterfly valves. The sealing pressure ratio is generated by the compression of the valve seat by the valve plate when the valve is closed, and the elasticity of the valve seat or valve plate (2) applies an external torque to seal the butterfly valve. The sealing pressure is generated by the torque applied to the valve shaft (3), which is a pressure filled sealing butterfly valve. The sealing pressure is generated by the pressure filling of the spring sealing element on the valve seat or valve plate (4), which automatically seals the butterfly valve. The sealing pressure is automatically generated by the medium pressure.

4. Fluorine lined butterfly valves are classified according to working pressure (1) Vacuum butterfly valves. The working pressure of the butterfly valve is lower than that of the standard reactor atmospheric calendar. (2) Low pressure butterfly valve. Butterfly valves with nominal pressure PN ＜ 1.6MPa. (3) Medium pressure butterfly valve. Butterfly valves with a nominal pressure PN of 2.5-6.4MPa. (4) High pressure disc valve. The nominal pressure PN is 10. 0-80.0MPa butterfly valve. (5) Pressure butterfly valve. Butterfly valves with a nominal pressure PN greater than 100MPa.

5. Fluorine lined butterfly valves are classified according to working temperature (1) High temperature butterfly valves. Butterfly valves (2) with a temperature of t>450 C and medium temperature disc valves. Butterfly valves with a temperature of 120 ° C ＜ t ＜ 450 ° C (3). 40C ＜ t

6. Classification of fluorine lined butterfly valves by connection method (1) Wafer type butterfly valves (2) Flange butterfly valves (3) Lug type butterfly valves (4) Welding type butterfly valves