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Original document - Mi-205 EN Edition: 2021-04
5. Set butterfly valves double acting actuators in closed position.
6. Remove the compressed air supply to the actuator.
7. Control the temperature of both pipeline and butterfly valve. Let cool down the pipeline
and the butterfly valve to the ambient temperature if necessary.
8. Ensure the butterfly valve against falling (
➔ Fig.5-1/a).
9. If the butterfly valve is equipped with double acting or closing spring loaded actuators
dismantle the connection between valve and piping.
10. If the butterfly valve is equipped with an opening spring loaded actuator, remove
the compete butterfly valve with the spacers assembled on each side (
➔ Chap. 5.2).
Procedure FSV
1. Close shut-off valves before and after the valve in question.
2. Depressurise the pipeline section in which the valve is installed.
3. Drain the medium from the pipeline.
4. Flush the pipeline section clean if necessary.
5. The valves must be closed during removal.
6. Secure the valve package to prevent it falling (
➔ Fig. 5-1/b).
6.2 Maintenance
Regular maintenance is necessary to be able to operate the butterfly valve with maximum
efficiency and low operating costs. SOMAS products enable trouble-free operation and are very
low-maintenance.
Check the butterfly valve, the actuator/gear and accessory parts regularly to ensure safe, trouble-free
operation. The tightening torques of the boltings on the flanges must be checked in accordance with
the specifications of the gasket manufacturer and tightened if necessary. The stuffing box must be
checked regularly and re-tightened if necessary. The most important replacement parts
are contained in the SOMAS replacement part set. The gasket set contains all necessary seals and
sealing rings for basic repair of the valve.
Note
Note down the details of the type plate (➔ Fig.6-1) before contacting the contact partners given
in the order confirmation.
Only use original replacement and wear parts from SOMAS Instrument AB.
Fig.6-1 Type plate
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