3.696.5275.210
46
Electric Pneumatic Positioner - Inspection and Replacement
(Fig. 30)
The SP500 is installed on the primary steam inlet side (Valve/Actuator assembly). The
documentation included with the unit gives specifics for operation and maintenance of the
Actuator. The drawing included with the unit will give the exact location, as well as the
relation with other components. This information should be reviewed before removal /
replacement of the positioner.
∆
Steam, or high temperature water present situations that can be very
dangerous because of the high temperatures and pressures and follow all accepted
and recommended procedures when performing installation, operation, and
maintenance procedures to avoid possible injury or death.
∆
The combination of electricity, steam, and water can pose a very dangerous
situation. Turn off / disconnect all electric power before attempting any maintenance
procedures.
Maintenance
(document ref.: IM-P343-16)
In normal working conditions bleed the air filter regulator on the supply air line daily, by
holding the tap located on the bottom of the catch basin open until any water, oil or other
impurities, which are the main cause of irregular operation, have completely drained away.
No special maintenance is required.
If the output signal is too low or even non existent,it is necessary to clean the calibrated
orifice located above the pneumatic amplifier. Loosen the screws and remove the identifying
plate.
All detailed references can be found in the product IMI.
Loosen screw (E.7) and turn the lock plate (F.7). Extract the calibrated orifice (G.7), which
is a push-fit, with the special extractor-cleaner (I.6), being careful not to loose the ‘O’ rings:
clean the 0.35 mm calibrated hole using the suitable cleaner filament.
Reassemble checking the exact position of the ‘O’ rings (H.7).
For any other details please refer to the detailed product IMI.
Fig. 30
Positioner
Summary of Contents for CSM-C
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