Butterfly structure works for environmental analysis

1 Classification by structure
(1) Center sealing butterfly valve
Aluminum Pneumatic Butterfly
QGSY ordinary pneumatic valve (2) single eccentric sealing butterfly valve
Plastic pneumatic valve (3) double eccentric sealing butterfly valve (4) three eccentric sealing butterfly valve
2 Press the sealing surface material classification
(1) soft sealing butterfly valve. 1) Sealing of non-metallic materials, non-metallic soft soft material. 2) Sealing material by a non-metallic rigid metal soft material. (2) metal seal butterfly valve. Sealing hard materials from metal to metal hard material.
3 Press Seal type classification
(A) Mandatory sealing butterfly valve 1) elastic sealing butterfly valve. Sealing pressure when the valve is closed by the valve plate extrusion seats, seat or valve plate elasticity of 2) applied torque seal security butterfly valve. Sealing pressure applied to the valve shaft by the torque generation (2) pressurized sealing butterfly valve. Sealing pressure from the valve seat or valve plate cable sealing element pressurized bomb pieces produced (3) self-sealing valve. Sealing pressure than the pressure generated automatically by the media.
4 Press Working pressure classification
(A) vacuum valve. Working pressure is lower than standard atmospheric calendar butterfly. (2) low-pressure valve. Nominal pressure PN <1.6MPa butterfly. (3) the pressure valve. , PN 2.5 - 6.4MPa butterfly. (4) high-pressure valve. Nominal pressure PN is 10. 0 - 80.0MPa butterfly. (5) high pressure valve. Nominal pressure PN> 100MPa butterfly. Butterfly butterfly plate mounted on the pipe diameter direction. In the valve body, the cylindrical passage, the disc-shaped disc around the axis of rotation, the rotation angle is between 0 ° ~ 90 °, rotation to 90 ° when the valve is fully open cards. This type valve in the pipeline should generally be installed horizontally.