Double flange center line butterfly valve
1. Technical Date:
Size: DN50-DN2600
Nominal Pressure: PN10/PN16
Operation Temperature: -10℃～150℃
Suitable Medium: Water, Sewage, Seawater, Gas, Food, Oils, etc.
2. Standard
Design Standard: GB/T 12238-2008
Structural Length: GB/T 12221-2005
Top Flange dimensions: ISO5211
Face to face dimensions: GB9112, DIN2501, BS4504, ISO2084, ANSI125
Type of connection: Flange Type
3 Feature:
This valve is mainly composed of body, butterfly plate, valve shaft, seat ,seal ring and transmission devices. 90 degrees of opening and closing, switch quickly, operating is small, light energy; Seat seal vulcanization coated in the body, make the body and medium complete isolation, can be applied to bad working environment and long service life. When the valve closing, two-way bearing zero leakage. Flow curve tending to straight line, excellent regulation performance.
4 Sealability:
The valve for soft seal, when closing the butterfly plate and the valve seat sealing performance is good, two-way sealed good performance and the torque is small, the valve can maintain 100% of zero leakage when it working, the friction is very small between butterfly plate and the seat seal(rubber lining). The valve shaft drive the butterfly plate, butterfly plate do 90 degrees rotation. Butterfly plate flexible for opening and closing, no card acerbity, beating phenomenon, small torque.