Operating Problems - INOXPA OVERFLOW VALVE Installation, Service And Maintenance Instructions

7. Operating problems

Valve does not close
Internal leak of product (valve closed)
External leak of product
Valve does not open/close
Dirt and/or foreign body between the shaft sleeve
•
and the valve body seat.
•
The springs are not applying pressure on the
shaft stop washer.
•
The shaft sleeve seal is worn or defective
• Normal wear of the seals
Premature
• wear of the
seals
• Back pressure
• Body seal defective
• Shaft seal defective
• Deformation of seat seal
• Spring in poor condition and/or jam for the dirt
The valve does not open when the pressure
•
increases
INOXPA S.A.U.
10.207.30.07EN · (0) 2023/11
PROBABLE CAUSES
Sealing gasket worn or affected by
the product
Excessive pressure in the line
Working temperature too high
Loss of tightness (vibrations)
SOLUTIONS
- Clean the body and the seat
- Increase the tightening torque of the springs
- Replace the seals
- Replace the seals
- Replace the seals with others of different mate-
rial and more adequate for the product
- Tighten the loosening pieces
- Clean frequently
- Change the spring with a stronger one
- Replace the seals with new ones
- Replace the seat seal with another of different
quality if it has deteriorated prematurely
- Replace or clean the spring and the shaft
- Calibrated the valve
Operating problems
13