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Original document - Mi-205 EN Edition: 2021-04
Warning!
Before assembling or disassembling the pneumatic actuator of a butterfly valve installed in the
pipeline depressurise the relevant valve in the pipeline system, isolate the valve and remove the
medium before working on the valve.
The pressurised medium may lead to injuries to personnel.
Warning!
Inform yourself of the properties of the medium. Protect yourself and your environment from
hazardous or poisonous substances.
Observe the safety instructions in the safety data sheets of the manufacturers. Ensure that no
medium can enter the pipeline during maintenance work.
Warning!
Before replacing the stuffing box of a butterfly valve installed in the pipeline depressurise the
relevant valve in the pipeline system, isolate the valve and remove the medium before working
on the valve.
The pressurised medium may lead to injuries to personnel.
Danger!
Risk of injury!
Observe movements of the valve disc.
Keep hands, tools and other objects away from the area where the valve disc moves. The valve
with valve disc mounted may work as a cutting tool. Do not leave any foreign objects in the
valve body. The valve disc of the butterfly valve always works as a separate device. There is no
difference whether an actuator is installed or not. The position of the disc may change during
transport or handling of the butterfly valve.
Warning!
Protect yourself against noise - use the relevant safety equipment.
The butterfly valve may cause noise in the pipeline. The noise level depends on the type of
application and can be determined with the SOMAS software SomSize.
Additional noise sources in the vicinity of the butterfly valve may increase the noise level.
Warning!
Beware of very cold or hot surfaces!
The body of the butterfly valve may become very cold or very hot during operation. Protect
yourself against frostbite and burns.
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