Burkert 2030 Instructions De Service page 9

Tightening torques for plastic housings (PV) and VA tubular housings (VA)
DN
65
80
100
For applications in aggressive media, we recommend attaching all free pneumatic
NOTE
connections to a pneumatic hose whose other end lies in a neutral atmosphere.
Stainless Steel Insert (only for units without membrane and casing)
If you have ordered and received a unit without
membrane and casing, a stainless stell insert (Id.-Nr.
648 864) will have been included with it.
Use of an EPDM/FKM membrane:
When assembling a unit with an elastomer membrane
(EPDM/FKM), lay the stainless steel, insert into the
groove in the pressure component.
Use of a PTFE membrane:
When using a PTFE membrane, the insert is not
required.
Tightening torque [Nm]
(values for guidance)
Elastomer diapghragm
20
30
40
PTFE diaphragm
30
40
50
2030/2031K big - 7