Gemü 695 Original Einbau- Und Montageanleitung Seite 23

Diaphragm
DN
size
25 15, 20, 25
40 32, 40
50 50, 65
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.
Control functions 2 + 3
6
5
4
3
2
1
0
1 2 3 4
Operating pressure [bar]
Pipe standard DIN
Connection
0
code
MG DN
15 4.1
25 20 6.3
25 13.9
32 25.3
40
40 29.3
50 46.5
50
65 -
MG = diaphragm size
Kv values determined acc. to DIN EN 60534, inlet pressure 5 bar, ∆p 1 bar, stainless steel valve body (forged 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.
Operating pressure [bar]
EPDM / FPM
0 - 10
0 - 10
0 - 10
5 6 7 8 9 10
Kv values [m³/h]
EN 10357 EN 10357
series B series A
(formerly (formerly
DIN 11850 DIN 11850
series 1) series 2) /
DIN 11866
series A
16 17
4.7 4.7
7.0 7.0
15.0 15.0
27.0 27.0
30.9 30.9
48.4 48.4
- -
Control pressure [bar]
Control
PTFE
function 1
0 - 6 5.5 - 7.0
0 - 6 5.5 - 7.0
0 - 6 5.5 - 7.0
The values shown relate to control function 2 (with opening
spring).
For control function 3 (without opening spring) control pressure is
approx. 1 bar lower.
The control pressure depending on the prevailing operating pres-
sure, as shown in the diagram, is intended as a guide for
operating the system with low wear on the diaphragm.
DIN 11850 SMS 3008
Series 3
18
4.7
7.0
15.0 12.6
27.0 26.2
30.9 30.2
48.4 51.7
- 62.2
23 / 40
Control
function 2 function 3
max. 5.5
max. 5.5
max. 5.0
ASME BPE /
DIN 11866
series C
37 59
- -
- 4.4
12.2
-
29.5
50.6
61.8
Control
max. 5.5
max. 5.5
max. 5.0
ISO 1127 /
EN 10357
series C /
DIN 11866
series B
60
7.4
13.2
16.2
30.0
32.8
55.2
-
695