Butterfly valve refers to the closing piece (disc or butterfly plate) as a disc, revolving around the valve shaft to achieve a valve opened and closed, in the pipeline mainly cut off and throttling effect. Butterfly valve headstock is a disc-shaped butterfly plate, in the valve body around its own axis rotation, so as to achieve the purpose of headstock or adjustment. Butterfly valve fully open to the full clearance is usually less than 90 °, butterfly valve and the butterfly itself has no self-locking ability, in order to locate the butterfly plate, the valve stem to add worm gear reducer. The use of worm gear reducer, not only can make the butterfly board has self-locking ability, so that the butterfly plate stopped in any position, but also can improve the operation performance of the valve.Butterfly Valve
Industrial special Butterfly valve features high temperature, applicable pressure range is also higher, valve nominal size, valve body using carbon steel manufacturing, valve plate sealing ring using metal ring instead of rubber ring. The large-scale high temperature butterfly valve uses the steel plate to weld the manufacture, mainly uses in the high temperature medium smoke duct and the gas pipeline.Butterfly Valve
Butterfly valve structure features 1, butterfly valve with simple structure, small size, light weight, the material consumption of the province, installation size is small, switch quickly, 90° reciprocating rotation, driving torque is small and so on, used to truncate, connect, adjust the pipeline medium, with good fluid control characteristics and sealing performance. 2, the butterfly valve may carry the mud, accumulates the liquid at the pipeline mouth at least. Low pressure, can achieve good sealing. Good regulation performance. 3, butterfly plate streamline design, so that the loss of fluid resistance is a kind of energy-saving products. 4, stem for the rod structure, after the quality control, has good comprehensive mechanical properties and corrosion resistance, abrasion resistance. Butterfly valve opening and closing valve stem only for rotary movement, not for take-off and landing operation, valve stem filler is not easy to damage, sealed reliable. and the butterfly plate cone pin fixed, outside the extension end is the blowout-resistant design, lest the stem collapses when the valve stem and the Butterfly board connection place unexpectedly breaks. 5, the connection method has the flange connection, to the clamp connection, the butt-weld connection and the lug to the clamp connection.
Drive form has manual, worm gear Transmission, electric, pneumatic, hydraulic, electro-hydraulic linkage, such as actuator, can achieve long-distance control and automation operation.Butterfly Valve