Burkert 2301 - Page 33

33
Maintenance, cleaning
→ Screwactuatorintothevalvebody.Observetighteningtorque
(see“Tab.1:Actuatorsizes”).
1
2
Pilot air port
Pilot air port
Fig.20: Ports
Tightening torques valve body/nipple
DN Tightening torque [Nm]
10/15 45±3
20
50±3
25 60±3
32,40 65±3
50 70±3
65 100±3
80 120±5
100 150±5
Tab.12: Tighteningtorquesvalvebody/nipple
If the position of the pilot air ports is unfavourable for
installingthehoses,thesecanbeseamlesslyalignedby
rotatingtheactuatorby360°.
Theprocedureisdescribedinchapter“8.3.4 Turning
actuator”.
10.3.2 Replacing the valve seat set
Theactuatormustbeuninstalledwhenreplacingthe
valve seat.
Thenecessarystepsaredescribedinchapter“10.3.1
Replacingthecontrolconeset”.
WheninstallingavalveseatwithanotherDN,theidenti-
cationnumberoftheglobecontrolvalvechanges.
Thevalveseatsetconsistsof
• Valve seat
•
Graphiteseal
• O-ring(dependingon
variant)
• Lubricant
DANGER!
Risk of injury from discharge of pressure and escaping medium.
Dismantlingadevicewhichisunderpressureishazardousdue
toasuddendischargeofpressureorescapingmedium.
▶ Beforedisassembly,shutothepressureandventalllines.
Type2301
English