How to adjust the price of pneumatic telescopic butterfly valve? What are the types of pneumatic butterfly valves? The pneumatic butterfly valve adopts an integrated structure, and can be operated and operated with dual phase power supply 380VC or single-phase power supply AC220V and DC power supply 24VDC. Pneumatic butterfly valve has obvious advantages such as small size, light weight, reliable function, simple matching, and large circulation ability. Pneumatic butterfly valve is mainly applicable to the process occasions and fluid control system where the pipeline pressure difference is large and the sealing requirements are strict.
、 The second is the leakage between the valve stem and the packing. Generally, F4 is used as the packing of most valves. Because of its good self sliding performance, small friction coefficient of check valve (f=0.05~0.1 for steel) and unique chemical stability, it is widely used. However, F4 also has some shortcomings. First, the cold flow tendency is large; Second, the coefficient of linear expansion is large, which leads to leakage due to cold contraction at low temperature, causing a large amount of ice at the valve stem, so that the valve fails to open. For this reason, the cryogenic butterfly valve developed adopts a self shrinking sealing structure, that is, it can be sealed at normal temperature and low temperature through the reserved clearance by taking advantage of the large expansion coefficient of F4.
Previous: How to adjust the air pressure of pneumatic flange butterfly valve?
Next: Is there anything wrong with the sales telephone of pneumatic hard seal wafer butterfly valve?
