Burkert Type 8650 - Manual (Page 104)

104
3. MAINTENANCE
DANGER!
Risk.of.injury.from.high.pressure.in.the.equipment!
• Before loosening the lines and valves, turn off the pressure and vent the lines.
3.1. Changing Valves During Operation
3.1.1. Installation instructions
Before replacing the valve, ensure that the relevant equipment is in an electrically safe state.
If the respective valve position does not feature a P-shutoff, first depressurize the system.
If the valves mounted on modules with P-shutoff are changed under pressure, only a maximum of four valves may
be removed at the same time.
When the valve is being removed, a relatively large amount of air is initially released, as the P-shutoff cannot close
until the required pressure difference is reached. However, as the automatic shut-off considerably reduces the
exhaust air, only a low residual leakage remains when the P-shutoff is closed.
3.1.2. Replacement
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Loosen the two screws on the valve and remove the valve.
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When installing the new valve, ensure that the seal has been inserted correctly.
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Tighten the valve to the tightening torques indicated in the operating instructions.
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When installing the valve, ensure that the service ports are also pressurized in the corresponding rest position
of the valve until it switches over. As a result, a connected actuator can perform a movement according to the
pressurization.
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Ensure that these actuator movements cannot cause any damage or unwanted operations in the equipment.
3.2. Changing Electronic Modules During Operation
Corresponding with the Siemens electric I/O modules, the electronic modules of the AirLINE EX system can be
changed during operation.
The interface module only permits the removal of one electronic module. If several electronic modules are
removed at the same time, the station signals a malfunction.
If changing the electronic modules during operation, proceed as follows:
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To replace an electronic module, first remove all valves connected to it (as described above). In the case of
unused valve positions, remove the cover flaps from the electric contacts if required.
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Remove electronic module. The procedure is described in the chapter “Installation / Removal of Individual
Segments”.
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The replaced module is installed in reverse sequence.
Type 8650
english
Maintenance and Repair