GAV 54F
Repair and maintenance work must only be performed by skilled, properly trained personnel.
It is imperative that the following safety instructions and the danger note on page 4 be
observed for all servicing and maintenance work to be performed.
Attention
Always use suitable tools and original spare parts – even if sudden emergencies arise –
to ensure proper functioning of the valve.
Valve dismantling
Before removing the complete valve from the pipeline or before repairing or servicing the
valve, i. e.
before undoing the flange bolting between valve and pipe
before undoing the bonnet bolting
before undoing the stuffing box screw at the stuffing box ring
if the bellows is defective or there is fluid leakage in this area
before removing any sealing, opening or vent plugs
valve pressure must be released and the valve must be allowd to cool down such that the
temperature is below the fluid's vaporization temperature in all areas in contact with the
fluid in order to effectively prevent any risk of scalding.
Danger
Danger to life: Never open a valve under pressure!
If toxic or easily inflammable fluids were handled, or fluids whose residues may cause
corrosion in conjunction with humidity, drain the valve and flush or vent it. If required, wear
safety clothing and a protecive mask!
Depending on the installation position, fluid residues may be left in the valve; these must
be collected and properly disposed of.
Prior to any transport, flush and drain the valve thoroughly.
All valve components have been designed to be largely maintenance-free.
The materials of the moving parts have been selected for minimum wear. To ensure
operating reliability and to reduce repair costs, all valves should however be checked
regularly, i. e. they should be actuated (opened/closed) at least once or twice a year, in
particular those valves which are rarely used or difficult to access.
The operator / user is responsible for fixing appropriate inspection and servicing inter-
vals as required by the service conditions of the valves. The service life of valves can be
prolonged by:
Lubricating the moving parts such as stem and stem nut using standardized lubricants
to DIN 585.
Maintenance
