(GB-IST-B925-0910) 8/35
The Company BARDIANI VALVOLE reserves the right to modify its products at any time without prior notice.
5. Operation
6. PRE-USE CHECK VALVE BEFORE OPERATION:
- Supply air to the valve.
- Supply electricity to the valve (with Giotto top
®
).
- Open and close the valve several times.
- Check that the valve functions operate correctly and smoothly.
6. Troubleshooting
2. REPLACING WORN VALVE PARTS:
- See page 12 for spare parts ordering.
1. TROUBLESHOOTING VALVE:
Always study operation and maintenance
instructions carefully before troubleshooting.
Risk of external
or
internal corrosion
Electrical Connections
Giotto - Top
®
Air
Air
Air
6. Troubleshooting
Risk of
seal
damage
External leakage
Internal leakage with closed valve,
caused by normal wear
External leakage
Internal leakage with closed valve
occuring earlier than normal wear
rate
Difficulty opening and closing
Worn out seal
Excesive pressure
Excesive temperature
Aggressive fluids
Too many controls active
Incorrect elastomer type of seal
Incorrectly positioning of the
actuator
Incorrect operation of actuator
Dirt in the actuator
Incorrect positioning of the valve
body
Replace with seals of a different
elostomer type
Modify operational conditions
Replace with seal of different
elastomer type
Fit the actuator correctly
Change from a normally open (NO)
to normally closed (NC) or
vice versa
Carry out actuator maintenance
Disassemble and reposition the
valve body
Replace seal
PROBLEM
POSSIBLE CAUSE
POSSIBLE REMEDY
