Burkert Type 2731 - Manual (Page 17)

The values in the following graphs apply to:
• Stainless steel body (VA) with
OD weld end connection
BS clamp connection
To protect the diaphragm during control function B, preferably
do not select the pilot pressure higher than is required to
switch the medium pressure.
control function B / elastomer diaphragm
0
1
2
3
4
5
6
7
8
9
10
0 1 2 3 4 5 6 7 8
pilot pressure [bar]
m
edium
pressure
[bar]
ø 80 epdm
DN20 DN25
Fig. 13: Pressure graph, actuator ø 80 mm, control function B,
elastomer diaphragm
0
1
2
3
4
5
6
7
8
9
10
0 1 2 3 4 5 6 7 8
pilot pressure [bar]
m
edium
pressure
[bar]
ш 100, ш 125 epdm
DN40 DN50
Fig. 14: Pressure graph, actuator ø 100 mm and ø 125 mm,
control function B, elastomer diaphragm
control function B / ptfe diaphragm
0
1
2
3
4
5
6
7
8
9
10
0 1 2 3 4 5 6 7 8
pilot pressure [bar]
m
edium
pressure
[bar]
ш 80, ш 100, ш 125 ptfe
DN40 DN50 DN20 DN25
Fig. 15: Pressure graph, actuator ø 80 mm, ø 100 mm und
ø 125 mm, control function B, PTFE diaphragm
17
Technicaldata
english
Type 2730 / 2731 / 2731K