Page 10 of 10
Copyright © AVK Holding A/S, original version, rev. 10, 30-June-2020
10. Troubleshooting
Symptom:
Valve sticks
Cause:
Piston is stuck in the cylinder
Cure:
Disassemble, clean and lubricate the piston assembly. Replace worn or
damaged parts
Symptom:
Valve sticks
Cause:
Worn bushings and pins
Cure:
Replace worn parts
Symptom:
Water level is unstable
Cause:
Worn bushings and pins
Cure:
Replace worn parts
Symptom:
Valve leaks from main seal
Cause:
Worn or damaged main seal
Cure:
Replace main seal
Make sure the liquid is not chemically aggressive to the valve parts and that
the pressure/flow combination does not cause cavitation
Symptom:
Valve leaks from main seal
Cause:
Impurities between valve seat and main seal
Cure:
Clean the piston assembly and replace the seal if damaged.
Install a filter before the valve
Symptom:
Water drips down the valve from its upper side
Cause:
Defective piston seal
Cure:
Replace piston seal
Symptom:
Valve does not close
Cause:
Float leaky and filled with water
Cure:
Replace float
Check if corrosion is the reason in which case another float material should be
considered.
11. Recommended spare parts
Only genuine AVK spare parts should be used.
AVK accepts no responsibility for damage caused by failing non-AVK parts.
Following spare parts are recommended to purchase with a ser. 854 valve:
•
Seals
•
Gaskets
•
Lubricants
•
Touch up paint
