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Edition: 2021-04 Original document - Mi-205 EN
Warning!
Before carrying out maintenance or repair work on the valve with actuator as well as installation
and disassembly of the butterfly valve in the pipeline, always disconnect the compressed air
supply to the actuator.
Single action actuators may move to “open” or “closed” position without being connected to the
air system.
5.2.1 Important information for installation
•
The protective devices are to be removed directly before mounting the valve
•
Counterflanges must be in accordance to the European or ASME standards
•
Clean the whole pipeline system prior start up. Impurities damage the seat
and the butterfly edge and lead to leakage
•
Flush the pipeline system with fully opened valve
•
Use gaskets of an appropriate quality (no spiral-wound gasket)
•
Check if all flange surfaces are clean and undamaged
5.2.2 End of line installations
When the valve is installed “end of line”, it is important that the valve inlet (coverplate
side) is facing towards the piping. (
➔ Fig.5-3).
Fig.5-3 Installing end of line
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