Technical Data - Gemü R647 Original Einbau- Und Montageanleitung
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6
Technical data
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.
Working medium temperature
Valve body PVC-U
Valve body ABS
Valve body PP-H
Valve body PVDF
The permissible operating pressure depends on the working
medium temperature.
Ambient temperature
Valve body PVC-U
Valve body ABS
Valve body PP-H
Valve body PVDF
O-ring material for
valve bodies with union ends
Diaphragm material
NBR
EPDM
FPM
Other combinations on request
MG
20
25
40
All pressures are gauge pressures. Operating pressure values were determined with static operating pressure applied on one side of a closed
valve. Sealing at the valve seat and atmospheric sealing is ensured for the given values. Information on operating pressures applied on both
sides and for high purity media on request.
Kv values determined acc. to DIN EN 60534, inlet pressure 5 bar, ∆p 1 bar, PVC-U valve body and soft elastomer diaphragm.
The Kv values for other product configurations (e.g. other diaphragm or body materials) may differ. In general, all diaphragms are subject to
the influences of pressure, temperature, the process and their tightening torques. Therefore the Kv values may exceed the tolerance limits of
the standard.
MG = diaphragm size
Temperature in °C
(plastic body)
Valve body material
PVC-U
Code 1
ABS
Code 4
PP-H
Code 71
PVDF
Code 75
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.
10 to 60 °C
-10 to 60 °C
5 to 80 °C
-10 to 80 °C
10 to 50 °C
-10 to 50 °C
5 to 50 °C
-10 to 50 °C
O-ring material
EPDM
EPDM
FPM
DN
NPS
15
1/2"
20
3/4"
25
1"
32
1 1/4"
40
1 1/2"
50
2"
Pressure / temperature correlation for plastic
-10
±0
5
-
-
-
6.0
6.0
6.0
-
-
6.0
6.0
6.0
6.0
Control pressure characteristic
10
9
8
7
6
5
4
3
2
1
0
1
Operating pressure [bar]
Control medium
Inert gases
Max. perm. temperature of control medium
Filling volume:
Diaphragm size 20
Diaphragm size 25
Diaphragm size 40
Operating
pressure
[bar]
0 - 6
10
20
25
30
Permissible operating pressure in bar
6.0
6.0
6.0
6.0
6.0
6.0
6.0
6.0
6.0
6.0
6.0
6.0
6.0
6.0
6.0
6.0
21 / 36
DN 15 - 25
DN 32 - 50
2
3
4
5
Control-
Kv
pressure
value
[m³/h]
10
12
max. 10
20
42
46
40
50
60
70
6.0
3.5
1.5
-
6.0
4.0
2.0
-
6.0
5.5
4.0
2.7
6.0
6.0
6.0
5.4
R647
6
40 °C
0.27 dm³
0.69 dm³
1.42 dm³
6
80
-
-
1.5
4.7
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