Control Volume; Da-Mode / Double Acting - GF DIASTAR Six FC Manual Instrucciones Original

Control medium
Information
• 5 bar max. for the FO­mode. For DN50 and from a line pressure of 10 bar the control
pressure is 6 bar max.
• When pressure exeeds 10 bar the controll pressure must be throttled by exhaust air
(adjust actuating time to approx. 3 s)
• Compressed air class (ISO 8573­1) 2 or 3 for –10 °C and 3 or 4 for T ›0 °C
• Temperature of control medium, max. 40 °C
• Depending on the working pressure PN, lower control pressure may be selected
• Please consider control pressure diagrams in the chapter "6.6 Control pressure dia-
grams" or in the Georg Fischer Planning Fundamentals.

Control Volume

Nominal diameter
20DN15
25DN20
32DN25
40DN32
50DN40
63DN50

5.4 DA-mode / Double acting

The valve has no defined basic position. The valve is opened and closed by applying con-
trol pressure to the corresponding connection (top connection for closing, bottom con-
nection for opening).
Pressure ranges and types
Information
• Please consider the pressure­temperature diagrams in the Planning Fundamentals
• Shown pressure ranges depend on the valve body material
Type
Valve body material
Diaphragm
20DN15...50DN40
63DN50
Working pressure
Ten / Sixteen (FO)
[dm³]
0.07
0.20
0.23
0.44
0.86
1.52
Ten FO/DA
PVC-U, PVC-C, ABS, PP-H, PP-n,
PVDF, PVDF-HP
Control pres-
EPDM PTFE
sure max.
10 bar 10 bar 5 bar
10 bar 10 bar 5 bar
→← →←
Sixteen FO/DA
PVC-C, ABS, PP-H, PP-n
Control pres-
EPDM PTFE
sure max.
10 bar 10 bar 5 bar
10 bar 10 bar 5 bar
→← →←
PVC-U, PVDF, PVDF-HP
Control pres-
EPDM PTFE
sure max.
16 bar 16 bar 5 bar
16 bar 16 bar 5 / 6 bar
→ →
33