Disc is the close part to the butterfly
valve. butterfly valve consists of body ,stem ,disc and seal
ring, belong to 90 degree switch cut-off valve.It get help from
handle or device drivers put some torque to the dis at the top
of stem, make the disc and body centerline coincidence or vertical
channels,to achieve fully open or close.
The main features of the valve:
1,Compact structure is reasonab.
2,Operating torque small.
3,open-close quick flexible.
4,The small resistance by fluid.
5,Flow coefficient large.
6,These valves maintain simple, easy to operate.
The classification of butterfly
valve:
Butterfly have three common classification,
We usually according to structures can be divided into the midline
butterfly valve and eccentric butterfly valve.And eccentric butterfly
valve can be divided into single eccentric butterfly valve, double
eccentric butterfly valve and connecting rod eccentric butterfly.
According to sealing structure can be divided into the metal sealing
butterfly valve and lining rubber or fluorine plastic soft sealing
butterfly valve .metal seal can use multi-layer seal structure
or elastomeric seal structure.
According to connection can be divided into wafter connection
and double flanged connection.According to the valve operation
mode acan be divided into manual butterfly valves,electric butterfly
valves, pneumatic butterfly valve and hydraulic valve.
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