Burkert Type 2712 - Manual (Page 14)

12 - 2712 big
M
AINTENANCE AND
S
ERVICING
english
Replacement of valve seat
To replace the valve seat, the actuator must be disassembled from the housing. For disassembly and
assembly, see "Replacing the control cone".
Tightening torques for seat assembly
Unscrew the old housing seat using the assembly tool and a
spanner.
Clean thread and sealing surface in the housing with compressed
air.
Select a tool insert and screw it into the assembly tool.
Push the new seat onto the assembly tool, grease the thread with
stainless steel lubricant, e.g. Klüberpaste UH1 96-402 from
Messrs. Klüber.
Place the attached seat by hand into the housing thread and
screw it in.
Tighten the seat with a torque wrench to the torque specified.
DN Torque
[Nm]
65 150 +10
80 180 +10
100 220 +10
Seat assembly tools
Housing DN Order no.
15 652 604
20 652 605
25 652 606
32 652 607
40 652 608
50 652 609
assembly tool
tool insert
(to match the nominal
diameter of seat)
valve seat
ATTENTION!
For special applications such as for oxygen and
analysis, use only the approved lubricants.
NOTE On installing a valve seat with a different nominal
diameter, the order number for the valve changes!