Burkert Type 2002 - Manual (Page 14)

14
TechnicalData
7.5.3. Minimum control pressures
incoming flow below seat
(medium flow against the closing direction of the valve)
The required minimum control pressure P
min
for control function A is:
actuator size
[mm]
40 50 63 80 100 125
p
min
[bar] 4.0 3.9 4.5 5.0 4.4 3.2
The following graphs illustrate the required minimum control pressure
depending on the medium pressure for control functions B and I
(incoming flow below seat).
Control
pressure [bar]
Medium
pressure
[bar]
CFB / CFI, ø 40 mm
DN
15
DN
20
Fig. 8: Pressure graph, actuator ø 40 mm, control function B and I
Control
pressure [bar]
Medium
pressure
[bar]
CFB / CFI, ø 50 mm
DN
15
DN
20
DN
25
Fig. 9: Pressure graph, actuator ø 50 mm, control function B and I
Control
pressure [bar]
Medium
pressure
[bar]
CFB / CFI, ø 63 mm
DN
20
DN
32
DN
40
DN
50
DN
25
Fig. 10: Pressure graph, actuator ø 63 mm, control function B and I
english
Type 2000/2002