Possible Failures and Troubleshooting Methods In butterfly valves

When using the butterfly valve, if meet the operation problem, the sheet on the below can be a reference. If you have more question, please contact us, our team will help with.

Possible Failures	Causes of Failures	Troubleshooting Methods
Leakage at the Packing Area	Expired or Aged Packing Bolts on the bonnet not tightened	Replace the packingl Evenly tighten the bonnet bolts
Leakage at the Packing Area	Bolts not tightened Damaged O-ring	Tighten the bolts. Replace the O-ring
Leakage at the Packing Area	Valve installation direction is inconsistent with the medium flow direction Failure to close completely Accumulation of dirt on the sealing surface Damage to the sealing surface	Pay attention to installation inspection. Re-adjust the screws on the actuator and ensure proper closure. Clean the accumulated dirt. Re-grind and repair the sealing surface