The Diaphragm Valves are widely used in Pharmaceutical, Water treatment, Food and beverage, Chemical, Power plant and other industries. In this article, we will show you the 5 reasons which may cause the failure of the diaphragm valve.
1. Rupture Of Diaphragm
1.1 Rubber, fluoroplastics aging of the diaphragm. Prevention and removal methods: regular replacement.
1.2 Operating pressure is too much, crushing the diaphragm. Prevention and removal methods: operating force to be small, pay attention to close the mark
1.3 Foreign bodies embedded between the diaphragm and the valve seat, pressure or wear the diaphragm. Prevention and elimination methods: operation should not be forced to close, should be repeated up and down several times, washed away foreign bodies, formal close the valve; timely replacement of damaged diaphragm
1.4 Open the height is too large, pull broken diaphragm. Prevention and removal methods: operation should not open too high.
2. Failure Of Operation
2.1 Diaphragm and disc falling off. Prevention and elimination methods: do not open too high, falling off should be timely repair or replace the diaphragm
2.2 Valve stem and disc connection pin off or broken due to wear prevention and removal methods: open not allowed to exceed the dead point, falling off should be repaired
2.3 Movable stem nut and valve cover and stem joint wear and jam. Prevention and removal methods: regular cleaning, active parts coated with graphite, molybdenum disulfide dry powder for lubrication. Fluorine diaphragm structure can be added in the active part of a small amount of grease.
3. Handwheel Operation Is Not Flexible
3.1 Stem Bending. Prevention and elimination methods: replace stem
3.2 Thread Damage. Prevention and elimination methods: repair thread, and add lubricant.
4. Diaphragm Valve Can Not Automatically Open And Close
4.1 Low pressure of gas source. Prevention and elimination methods: increase the pressure of gas supply
4.2 Excessive spring jacking force. Prevention and elimination methods: reduce spring jacking force
4.3 Rubber diaphragm damage. Prevention and removal methods: replacement of the diaphragm.
5. Leakage Between Valve Body And Valve Cover
5.1 Loose connection bolt. Prevention and elimination methods: fastening connection bolt
5.2 Cracking of inner glue layer of valve body. Prevention and elimination method: replace valve body.
Post time: Nov-25-2021