25 / 44
600, 630
6 Technical data
Ambient temperature
Valve body PVC-U 10 to 50 °C
Valve body PP / PP-H 5 to 50 °C
Valve body ABS / PVDF -10 to 50 °C
Control medium
Inert gases
Min. required control pressure see table below
Max. permiss. control pressure 6 bar
Max. perm. temperature of control medium 40 °C
Filling volume:
Actuator size 1 0.02 dm³
Actuator size 2 0.25 dm³
Actuator size 3 0.50 dm³
Actuator size 4 0.80 dm³
Working medium temperature
Valve body PVC-U 10 to 60 °C
Valve body ABS
-20 to 60 °C
Valve body PP, PP-H 5 to 80 °C
Valve body PVDF -20 to 80 °C
The permissible operating pressure depends on the working
medium temperature.
Working medium
Corrosive, inert, gaseous and liquid media which have no
negative impact on the physical and chemical properties of
the body and diaphragm material.
Pressure / temperature correlation for PN 10 (valve bodies diaphragm size 25-50)
Temperature in °C
(plastic body)
-20 -10 ±0 5 10 20 25 30 40 50 60 70 80
Valve body material Permissible operating pressure in bar
PVC-U Code 1 - - - - 10.0 10.0 10.0 8.0 6.0 3.5 1.5 - -
ABS Code 4 10.0 10.0 10.0 10.0 10.0 10.0 10.0 8.0 6.0 4.0 2.0 - -
PP-H Code 71 - - - 10.0 10.0 10.0 10.0 8.5 7.0 5.5 4.0 2.7 1.5
PVDF Code 20 10.0 10.0 10.0 10.0 10.0 10.0 10.0 9.0 8.0 7.1 6.3 5.4 4.7
Data for extended temperature ranges on request.
Please note that the ambient temperature and medium temperature generate a combined temperature at the valve body which must not
exceed the above values.
O-ring material for valve bodies
with union ends
Diaphragm material O-ring material
NBR EPDM
FPM FPM
EPDM EPDM
PTFE FPM
Other combinations on request
Control function 1 [bar] Control function 2+3 [bar] Kv value
Type
Diaphragm
size
DN
Operating pressure
Control
pressure
Operating pressure
Control
pressure
[m³/h]
EPDM/FPM PTFE EPDM/FPM PTFE
GEMÜ
630
10
12
0 - 6 0 - 6 3.2 - 6.0 - - -
2.8
15 3.5
20 3.5
GEMÜ
600
25
15
0 - 10 0 - 6 4.0 - 6.0 0 - 10 0 - 6
max. 6.0
5.6
20 8.2
25 10.5
40
32
0 - 10 0 - 6 4.0 - 6.0 0 - 10 0 - 6
18.0
40 25.0
50 50 0 - 10 0 - 6 4.0 - 6.0 0 - 10 0 - 6 46.0
All pressures are gauge pressures.
Kv values determined acc. to IEC 534 standard, inlet pressure 6 bar, ∆p 1 bar, PVC-U valve body and soft elastomer diaphragm.
Pressure / temperature correlation for PN 6 (valve bodies diaphragm size 10)
Temperature in °C
(plastic body)
-20 -10 ±0 5 10 20 25 30 40 50 60 70 80
Valve body material Permissible operating pressure [bar]
PVC-U Code 1 - - - - 6.0 6.0 6.0 4.8 3.6 2.1 0.9 - -
PP Code 5 - - - 6.0 6.0 6.0 6.0 5.1 4.2 3.3 2.4 1.6 0.9
PP-H Code N5 - - - 6.0 6.0 6.0 6.0 5.1 4.2 3.3 2.4 1.6 0.9
PVDF Code 20 6.0 6.0 6.0 6.0 6.0 6.0 6.0 5.4 4.8 4.3 3.8 3.2 2.8