Last update: 03/11/2011
4
PROBLEMS AND SOLUTIONS
PROBLEMS
PROBABLE CAUSES
SOLUTIONS
Valve cycles
- Air inside the system
- Worn out seals
- Clogged bypass or diameter too small
- Flush out
- Replace
- Clean or widen passages
The valve does not reach
working pressure
- Piston seals ruined
- Presence of impurities between seat and shutter
- Seat & shutter worn out
- Nozzle worn out
- Incorrect choice of nozzle
- Air shortage in pneumatic jack
- Air pressure too low
- Pneumatic jack seals worn out
- Replace
- Clean seat
- Replace
- Replace
- Fit nozzle with inferior flow factor
- Open air compressed feed
- Reset air pressure to circa 4 bar
- Replace
Pressure spikes
- Minus min.5% of total flow in discharge
- Clogged nozzle
- Re-adjust correctly
- Clean or replace
MAINTENANCE
STANDARD: every 400 working hours (circa 10,000 cycles), check and lubricate the seals with water resistant grease.
SPECIAL: every 800 working hours( circa 20,000 cycles), control the wear of the seals and internal parts and if
necessary, replace with original PA parts taking care during installation and to lubricate with water resistant grease.
Maintenance has to be carried out by Specialized Technicians.
The manufacturer is not to be considered responsible for damage as a result from incorrect fitting and
maintenance
REGULATIONS : see norm manual
The accessory hereby described bears the CE marking in accordance with the Norms and Directives applied on
the Declaration of conformity.
For a correct utilization, follow the directions described in this manual and re-print them on the Use and maintenance
manual of the machine.
Make sure that you are given the Original Conformity Declaration for the accessory chosen. The present manual is
valid for all unloader valves named VRPP 600.
Technical data, descriptions and illustrations are indicative and liable to modification without notice.
Instruction manual, maintenance, installation, spare parts
For a correct utilization, follow the directions of this manual
Re-print them on the Use and Maintenance booklet of the machine.
n. 12.9250.00
Summary of Contents for VRPP 600
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