The cause of the common faults and pneumatic valve solution 2

the possibility of pneumatic valve failure

the cause of the pneumatic valve failure

pneumatic valve fault elimination methods



packing pneumatic valve leakage. Packing gland without pressure. Packing for their use too long, or save the wrong failure
. Tighten nut evenly, packing pressure. Replacement of packing



seal face between the leakage. Sealing surface unclean clutter.
sealing surface damage. Retention of clear out clutter. Reprocessed repair or replace the


pneumatic valve body and bonnet joint leakage
. Uneven connection bolts. Flange sealing surface damage. Gasket fracture or failure
. To tighten evenly. Rebuild. Replace the new gasket


hand wheel rotation is not flexible or pneumatic valve cannot open/close
. Packing pressure too tight. Packing pressure plate, pressure device askew. Pneumatic valve stem nut is damaged. Pneumatic stem nut thread severe wear or fracture. Pneumatic valve rod bending
. Appropriate unscrew packing nut on the pressure plate. Correction of packing pressure plate. Open trim thread and remove debris. Replace the air valve stem nut. Correct the pneumatic valve stem