Burkert 2301 - Page 34

34
Maintenance, cleaning
WARNING!
Risk of injury due to improper operation.
Failuretoobservethetighteningtorquevalueisdangerousdue
totheriskofdamagetothedevice.
▶ Onlyperformthereplacementwithspecialassemblytools
(forordernumbersseechapter“12.2Assemblytools”).
▶ Observethetighteningtorque(see“Tab.12:Tightening
torquesvalvebody/nipple” and “Tab.13:Tighteningtorques
valveseatassembly”).
Procedure:
→ Replacethevalveseatasdescribedbelowwhentheactuator
isremoved.
Replacing valve seat
→ Usetheassemblytool(withsuitabletoolattachment)anda
wrenchtounscrewtheoldvalveseat.
→ Cleanthebodythreadandsealsurfacewithcompressedair.
→ Ifnecessary,replacethetoolattachmentintheassemblytool
(dependingontheDNofthenewvalveseat).
→ Attachanewvalveseattotheassemblytool.
Assemblytool
Tool insert
Valve seat
Fig.21: Replacing the valve seat
WARNING!
Risk due to incorrect lubricants.
Unsuitablelubricantmay contaminatethemedium. Thereis a
riskofexplosioninoxygenapplications.
▶ Forspecicapplications,e.g.oxygenoranalysisapplications,
use approved lubricants only.
Type2301
English