Ball flush: the assembly should be correct, the operation should be smooth, not allowed to make the throttle valve; Ball punching should be promptly repaired, replace the seal seat for throttling, damaged sealing surface: not allowed to throttle the sealing surface is pressed Bad: tighten the bolt at the valve seat should be uniform, the force should be small, would rather be more tight several times, not too tight too tight one at a time, damaged sealing surface can be shaved repair sealing surface without preload pressure: seat sealing surface should Periodically check the preload pressure and found that the sealing surface is leaky or loose contact should be a little squeeze the seat sealing surface; preload spring failure to replace the wrench, valve stem and the ball at the junction of the gap, the wrench has been closed, While the ball rotation angle less than 90 ° and produce leakage: the limited position of the mechanism of the wrench, the valve stem and the ball at the junction of three loose and the gap should be repaired, fastened to prison; adjust the limit block to eliminate wrench advance angle, So that the ball is properly open and close the valve seat and the body contact surface is not clean, wear, 0-ring damage to the valve seat leakage: improve seat and body contact surface finish, reduce the number of seat disassembly, O-ring regular replacement of rubber Sealing ring aging, wear: rubber sealing surface regularly replace the sealing surface pressure ring loosening, damaged: the pressure ring loose should be re-tightened, damaged and corroded Serious should be replaced by the media flow is wrong: should be according to the media flow arrow butterfly valve stem and butterfly connection Loose the valve so that the valve is not strict: remove the butterfly valve, repair valve stem and butterfly junction drive and valve stem damage, so that the sealing surface is not strict: for repair, serious damage should be replaced
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