Self-check and maintenance of pressure controller

1. Air leaks between the upper and lower shells. Bubbles are generated after smearing with detergent powder. The upper and lower shell castings are defective; the seal ring between the upper and lower shells is damaged or the fastening bolts are loose; the tympanic membrane of the valve is aged and the air leaks from the adjustment screw. Clean the surface of the housing and repair the defect with metal repair agent; replace the sealing ring or tighten the bolt; replace the valve tympanic membrane.

2, the pressure is less than 0.65Mpa, and continues to decrease, but the gas is always discharged from the pressure controller vent hole D. The valve tympanic membrane, tympanic membrane spring, or deflated valve is damaged and the seal fails; the bleed hole C is blocked; the deflation check valve leaks; the deflation check valve spring loses and fails; the cuff is aged and leaks. Check the sealing of valve tympanic membrane, tympanic membrane spring or deflated valve. If it is damaged, replace it with a new one to clear the bleed hole C; replace the deflation check valve; replace the deflation check valve spring; replace the cup.

3, deflation when the pressure is less than 0.65Mpa adjustment screw is too loose, the valve tympanic membrane deflation pressure is low, deflated valve aging and leak. Screw the adjusting screw a little; replace the bleed valve.

4. The air pressure is normal, but air constantly leaks from the pressure controller vent D or D. The tympanic membrane of the valve is in close contact with the deflation valve and is not tightly attached, forming a gap and leaking; the tympanic membrane spring is damaged and fails, and the tympanic membrane of the valve cannot be compressed. Check valve tympanic and deflated valve seals and replace if damaged; replace tympanic membrane spring.

5. After the air compressor stops pumping, the bleed holes D or C do not deflate, but the air pressure drops quickly. The inlet check valve is worn out, damaged, and leaks airtightly; the intake check valve spring is damaged and fails. Check the inlet check valve and its sealing condition. If it is damaged, replace it with a new one; replace the inlet check valve spring.

6, when the air pressure is higher than 0.70Mpa adjustment screw is too tight, the tympanic membrane spring compression is over, the tympanic membrane deflation pressure is too high. Loosen the adjustment screw a little to reduce the amount of compression of the tympanic membrane spring.

7, the pressure is higher than 0.70Mpa, and continues to rise, but the air does not release the tympanic membrane spring from the bleed hole D or C; the air hole in the deflation valve is blocked; the deflation check valve spring is stuck; The rod was stuck. Replace the tympanic membrane spring; clear the air hole on the air release valve; replace the deflation check valve spring; trim or replace the stem. When maintaining the pressure controller, it is necessary to keep the various seals, joints, and air inlet and outlet of the pressure controller clean, to prevent the entry of dirt and impurities, causing the pipeline to be clogged or the seal not tight. Its internal rubber valve and rubber material are replaced to prevent premature aging of rubber parts and affect safety. After the maintenance, the working performance of the pressure controller shall be checked and calibrated with an accurate pressure gauge. The adjustment may be used only after the adjustment.

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