ARI Armaturen DP34 Tridem EN - Manual (Page 14)

Page 14 0040504001 2010
Operating and installation instructions
Pneumatic actuators - DP34T / DP34Tri
6.0 Putting the valve into operation
Before putting a new plant into operation make sure that:
- Attention paid that the control pressure connection has been properly installed
(please see point 5.4).
- Check to make sure that all mobile, exterior parts can move freely.
- All applicable, current information given in the operating manuals for additional parts (for
ex. positioner, filter reduction station, interlocking relay, ...) have been observed.
- In case of improper functioning, all assembly and setting jobs must be checked over and
corrected, is necessary.
7.0 Disassembly of the actuator unit from the valve
To proceed with the disassembly of the actuator unit from the valve, the following
must be observed:
- Drive the actuator with control pressure into the middle position.
- Loosen cylinder screws.
Remove the lock washer, securing flange and thread bush from the actuator connection.
- Loosen the hexagon nuts and remove the actuator from the valve.
7.1 Disassembly of the actuator unit
8.0 Care and maintenance
Maintenance and maintenance intervals have to be defined by the operator according to
the service conditions.
- For each operating mode, the actuator unit, if need be, should be freed from exterior dirt.
- The actuator unit may not be cleaned with high-pressure equipment or with aggressive
cleaning products, that are a health hazard, or with flammable cleaning products or
solvents.
- After cleaning, for example, an inspection should be carried out checking the sealings of
the actuator unit.
- In order to ensure smooth running, the operation device for the control air should be
furnished with a maintenance unit (see point 6.1).
- The rolling diaphragm (pos. 10) and the stem guiding (pos. 3 and 30) with O-ring-sealing
are wearing parts and must be replaced when necessary.
- Actuators with manual emergency adjustment:
Lubricate with grease by using lubricating nipple (pos. 54).
ATTENTION !
Before putting a new plant into operation or restarting a plant after repairs or
modification, always make sure that:
- All works has been completed!
- The valve is in the correct position for its function.
- Safety devices have been attached.
ATTENTION !
- Due to safety reasons, the system must be driven down prior to disassembly of
the actuator unit (in a pressureless state!).
ATTENTION !
- Maintenance, repairs or alterations can only be carried out in the factory
or by authorized workshops having special tools and devices!