Bardiani Valvole BBZO, Instruction, Use And Maintenance Manual, Page: 17 / 65

7 Troubleshooting
17 EN-IST-BBZO-0420
7 Troubleshooting
PROBLEM POSSIBLE CAUSE POSSIBLE SOLUTION
External leak
Worn gasket Replace the seal
Leaks inside the closed valve
caused by normal wear
External leak
Excessive pressure
Replace with a gasket of a
different type of elastomer
Excessive temperature
Premature leaks inside the
closed valve
Aggressive fluids
Modify the operating conditions
Too many commands active
Difficulty opening and closing
Incorrect type of elastomer used
for the gaskets Replace with a gasket of a
different type of elastomer
Incorrect positioning of the
actuator
Install the actuator correctly
Incorrect operation of the
actuator
Change from normally open
(NO) to normally closed (NC) or
vice versa
Impurities in the actuator
Actuator inspection and
maintenance
Incorrect valve body positioning
Disassemble and correctly
reposition the valve body