Usage environment and operational factors
Overload or abnormal pressure
The system pressure exceeds the rated pressure of the valve (such as PN16 valve used for PN25 working condition), or is impacted by water hammer effect.
Solution: Install a pressure buffering device (such as an accumulator) and regularly verify the system pressure.
Temperature fluctuations and corrosion
Frequent thermal cycling (such as steam systems) leads to thermal fatigue cracks; Corrosion of the medium (such as acidic water) accelerates crack propagation.
Solution: Choose corrosion-resistant coatings (such as epoxy resin) or upgraded materials (such as stainless steel valve bodies).
Improper installation and maintenance
Insufficient pipeline support causes the valve body to bear additional bending moments; Uneven pre tightening force of bolts causes local deformation.
Solution: Install according to specifications (ISO 5208), regularly check bolt torque and pipeline alignment.