Burkert 2301 Series, Operating Instructions Manual, Page: 35 / 48

35
Maintenance, cleaning
→
Grease the valve seat thread using a suitable lubricant (e.g.
Klüberpaste UH1 96-402 from Klüber).
→ Manually screw attached valve seat into the valve body
thread.
→
Tighten valve seat using torque wrench. Observe tightening
torque (see “Tab. 13”).
Tightening torques valve seat assembly
Valve seat size
Tightening torque [Nm]
Coated valve seat
4–15 20 ± 3
20 28 ± 3
25 40 ± 5
32 65 ± 5
40 85 ± 8
50 120 ± 8
65 150 + 10
80 180 + 10
100 220 + 10
Tab.13: Tighteningtorquesvalveseatassembly
Install actuator (with control unit) on the valve body
→ Replace the seal if necessary.
WARNING!
Risk due to incorrect lubricants.
Unsuitable lubricant may contaminate the medium. There is a
risk of explosion in oxygen applications.
▶
For specific applications, e.g. oxygen or analysis applica -
tions, use approved lubricants only.
→
Before re-installation, grease nipple thread of the actuator
(e.g. using Klüberpaste UH1 96-402 from Klüber).
NOTE!
Damage to the valve seat seal or seat contour.
▶
When installing the actuator, the valve must be in the open
position.
→ For
control function A
Without control unit: pressurise pilot air port 1 with com -
pressed air (5 bar). Valve opens.
With control unit: Open the valve in accordance with the
operating instructions of the control unit.
→
Screw actuator into the valve body. Observe tightening torque
(see “Tab. 1: Actuator sizes”).
Type 2301
English