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9.1 Trouble-shooting
Minor problems can be solved without consulting a specialist.
The following Table contains a list of the most common problems, the possible causes and possible remedies.
For particularly difficult actions which are not mentioned in the Table, contact the Manufacturer's Customer
Service Department.
Danger - Warning
Before carrying out any operation "set the valve concerned in safety" (see "Glossary and termino-
logy"), operate according to the indications on the "Operation and Maintenance Manual" and in accor-
dance with and in compliance with the standards in force as regards health and safety.
Before any kind of operation, set the valve in safety condition.
Minor problems can be resolved without consulting a specialist. Here are a few examples of possibles causes
and solutions.
FAULT
1) Pressure in silo remains higher
than the overpressure value set,
after loading.
2) Pressure in silo remains lower than
the negative pressure value set,
after emptying
9.2 Check-list in case of fault
If you have been unable to solve the problem on the valve even after having carried out the operations sug-
gested in paragraph "Trouble-shooting" please contact the plant technician/installer/or the Manufacturer.
If technical assistance is required, in addition to the valve data, the plant technician/installer or Manufacturer
will also need information concerning the plant in which the valve is installed, its installation and its working, for
better identification of the problem that has occurred.
Obviously many of the checking operations which are requested have already been performed in the various
steps during installation, testing and start-up of the valve concerned.
Danger - Warning
Before carrying out any operation "set the valve concerned in safety" (see "Glossary and termino-
logy"), operate according to the indications on the "Operation and Maintenance Manual" and in accor-
dance with and in compliance with the standards in force as regards health and safety.
VCP
9.0 INFORMATION REGARDING FAULTS
POSSIBLE REASON
Membrane encrusted.
Membrane encrusted.
37
VAL.VCP.--.M.A5.1017.EN
SOLUTION
Take off cover and remove crust.
Take off cover and remove crust.
10.17
2
Issue: A5
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