Operating Problems. Causes And Solutions - INOXPA NL Installation, Service And Maintenance Instructions

5. Operating problems. Causes and
PROBLEM CAUSE/EFFECT
The seal or bushing have worn out, deteriorated, or
become blocked up.
JERKING OF THE
VALVE PLUG
Insufficient air pressure
Normal wear of the seals
Premature
wearing of
INTERNAL LEAK OF
the seals
THE PRODUCT
(VALVE CLOSED)
Backpressure
Deformation of seals.
VALVE DOES NOT
Actuator bush in poor condition and/or jammed (dirtiness)
OPEN/CLOSE
Excessive pressure on plug
SURGE The flow direction is the same as closing-movement
direction.
12
solutions.
Watertight seal worn or affected by the
product.
Excessive pressure in the line.
Working temperature too high
Loss of watertightness (vibration).

Operating problems. Causes and solutions.

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SOLUTION
• Replace the seals.
• Replace the seals with others of
different material and more
appropriate to the product.
• Lubricate with soapy water or
lubricant compatible with the
material of the seal and with the
product.
• Replace the actuator with a larger
one.
• Increase the compressed air
pressure.
• Replace the seals.
• Replace the seals with others of
different material and more
appropriate to the product.
• Tighten any loose components.
• Clean frequently.
• Replace the actuator with a larger
one.
• Replace the seals with others of
different quality, if prematurely
deteriorated.
• Replace bush (clean)
• Reduce pressure.
• Flow direction must be contrary to
closing movement
• Use auxiliary air on the bush side.
ED. 2009/11