The comparative advantages and disadvantages of the butterfly valve

Butterfly valve disc opening and closing parts back and forth about 90 ° rotation to open, close and adjust the flow passage a valve.
Advantages:
① simple structure, small size, light weight, Province of supplies, not for large diameter valves;pilot valves
(2) open and close rapidly, small flow resistance;
③ can be used for a medium with suspended solid particles, based on the strength of the sealing surface is also available in powder and granular media. Applicable to two-way opening and closing of the ventilation and dust removal pipeline and regulation, are widely used in metallurgy, light industry, electric power, petrochemical, gas pipelines and waterways.
Disadvantages:
① flow adjustment range, open up to 30%, the flow rate reached nearly 95%.
(2) due to the structure of the butterfly valve and sealing material constraints, should not be used in high temperature, high pressure piping systems. General operating temperature below 300 ℃, PN40.
(3) sealing performance relative to the ball valve, globe valve is poor, it is used for sealing requirements are not very high.solenoid valve actuator