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Maintenance, cleaning
10 MAINTENANCE, CLEANING
10.1 Safety instructions
DANGER!
Danger – high pressure in the equipment!
▶ Beforelooseningthelinesandvalves,turnothepressure
andventthelines.
Risk of injury due to electrical shock!
▶ Beforereachingintothesystem,switchothepowersupply
andsecuretopreventreactivation!
▶ Observeapplicableaccidentpreventionandsafetyregula-
tionsforelectricalequipment!
WARNING!
Risk of injury from improper maintenance!
▶ Maintenancemaybeperformedbyauthorisedtechnicians
only!
▶ Toscrewonorunscrewvalvebodyoractuator,useanopen-
endwrench,neverapipewrench,andobservetightening
torques.
Risk of injury from unintentional activation of the system and
an uncontrolled restart!
▶ Securesystemfromunintentionalactivation.
▶ Followingmaintenance,ensureacontrolledrestart.
WARNING!
For control function I – Danger if pilot pressure fails!
ForcontrolfunctionIcontrolandresettingoccurpneumati-
cally.
Ifthepressurefails,nodenedpositionisreached.
▶ Toensureacontrolledrestart,rstpressurizethedevicewith
pilotpressure,thenswitchonthemedium.
Risk of injury from moving parts in the device!
▶ Donotreachintoopenings.
10.2 Maintenance work
Actuator:
Theactuatoroftheangle-seatcontrolvalveismaintenance-free
provideditisusedaccordingtotheseoperatinginstructions.
Wearing parts of the angle-seat control valve:
Partswhicharesubjecttonaturalwear:
• Valveseat
• Controlcone
• Seals
→ Ifleaksoccur,replacetheparticularwearingpartwithan
appropriatesparepart.
(Forspare-partsetsseechapterentitled“12Replacement
parts”).