4 pneumatic connection, For diaphragms – Burkert Type 2731 User Manual
Page 22
Orifice dn
(diaphragm size)
tightening torques for diaphragms [nm]
epdm
ptfe
15
3.5
4
20
4
4.5
25
5
6
32
6
8
40
8
10
50
12
15
Tab. 11: Tightening torques for diaphragms
7.4
pneumatic connection
Danger!
danger – high pressure in the equipment!
▶ Before loosening the lines and valves, turn off the pressure and
vent the lines.
Warning!
risk of injury from unsuitable connection hoses!
Hoses which cannot withstand the pressure and temperature
range may result in hazardous situations.
▶ Use only hoses which are authorised for the indicated pressure
and temperature range.
▶ Observe the data sheet specifications from the hose manufacturers.
The operation of the diaphragm control valve Type 2730 / 2731
/ 2731K is possible only in combination with an control unit.
Possible control units are:
Positioner Type 8630, 8635, 8692, 8694, 8792
Process controller Type 8693, 8793
Observe the type label!
The pneumatic connection of the control unit is described in
the respective operating instructions for the control unit.
22
Installation
english
Type 2730 / 2731 / 2731K