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Pneumatic diaphragm valve DIASTAR 025
3.7.4
Control volume
DIASTAR 025
FC
[dm³]
75DN65
2.2
90DN80
2.2
110DN100
3.8
160DN150
3.8
3.7.5
Pressure levels
Pressure
level
DN
[bar]
75DN65
10
90DN80
10
110DN100
6
160DN150
6
Medium
pressure
Single-sided
unidirectional
1)
At 0 bar medium pressure.
2)
At 10 bar medium pressure.
At 6 bar medium pressure.
3)
Note: For optimum service life of the fittings, it is recommended to set the PS control pressure based on the medium pressure
- see control pressure diagrams. The PS control pressure may vary depending on the nominal diameter DN, diaphragm material
and function of the actuator.
If different control pressures are used in the system, it is recommended to use a pressure regulating valve. For the specific
dimensioning, please contact your representative at Georg Fischer Piping Systems.
16
DIASTAR 025
DIASTAR 025
FO
DA
[dm³]
[dm³]
close
4.4
4.4
4.4
4.4
7.6
7.6
7.6
7.6
Max. control pressure
[bar]
FC
FC
EPDM
PTFE
1)
1)
3.8
5.8
5.6
5.3
5.3
5.3
4.8
4.8
open
2.2
2.2
3.8
3.8
FO/DA
3.0
2)
4.0
2)
4.0
3)
5.0
3)
Operating Instructions
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