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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,ball valves, 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 valves :
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 valves and hydraulic valve.
a passage that connects a topic to one that follows.：
What's a Butterfly Valve |
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发表于 2010-4-6 16:47