GEM 687 Installation, Operating And Maintenance Instructions page 27

Pipe standard DIN
Connection
0
code
MG DN
10 -
12 -
10
15 3.3
20 -
15 4.1
25 20 6.3
25 13.9
32 25.3
40
40 29.3
50 46.5
50
65 -
65 -
80
80 -
100 100 -
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.
The Kv value curve (Kv value dependent on valve stroke) can vary depending on the diaphragm material and duration of use.
Temperatures
Medium temperature
FKM (code 4)
EPDM (code 13)
EPDM (code 29)
EPDM (code 17)
PTFE/EPDM (code 54)
PTFE/EPDM (code 5M)
Sterilisation temperature
FKM (code 4)
EPDM (code 13)
EPDM (code 29)
EPDM (code 17)
PTFE/EPDM (code 54)
PTFE/EPDM (code 5M)
¹ The sterilisation temperature is valid for steam (saturated steam) or superheated water.
² If the sterilisation temperatures listed above are applied to the EPDM diaphragms for longer periods of time,
the service life of the diaphragms will be reduced. In these cases, maintenance cycles must be adapted accordingly.
This also applies to PTFE diaphragms exposed to high temperature fluctuations.
PTFE diaphragms can also be used as moisture barriers; however, this will reduce their service life.
The maintenance cycles must be adapted accordingly.
GEMÜ 555 and 505 globe valves are particularly suitable for use in the area of steam generation and distribution.
The following valve arrangement for interfaces between steam pipes and process pipes has proven itself over time:
A globe valve for shutting off steam pipes and a diaphragm valve as an interface to the process pipes.
Ambient temperature
Kv values [m³/h]
EN 10357 EN 10357 DIN 11850
series B series A
(formerly (formerly
DIN 11850 DIN 11850
series 1) series 2) /
DIN 11866
series A
16 17
2.4 2.4
- -
3.8 3.8
- -
4.7 4.7
7.0 7.0
15.0 15.0
27.0 27.0
30.9 30.9
48.4 48.4
- -
- 77.0
- 111.0
- 194.0
(1)
SMS 3008 ASME
series 3 BPE /
DIN 11866
series C
18 37
2.4 -
- -
3.8 -
- -
4.7 -
7.0 -
15.0 12.6 12.2
27.0 26.2
30.9 30.2 29.5
48.4 51.7 50.6
- 62.2 61.8
- 68.5 68.5
- 80.0 87.0
- 173.0 188.0
27 / 48
ISO 1127 / DIN ISO
EN 10357 228
series C /
DIN 11866
series B
59 60 1
2.2 3.3 -
- - 3.2
2.2 4.0 3.4
3.8 - -
- 7.4 6.5
4.4 13.2 10.0
16.2 14.0
- 30.0 26.0
32.8 33.0
55.2 60.0
- -
96.0 -
111.0 -
214.0 -
max. 150 °C , max. 60 min per cycle
(2)
max. 150 °C , max. 180 min per cycle
(2)
max. 150 °C , no time limit per cycle
(2)
max. 150 °C , no time limit per cycle
(2)
Steam input
Steam distribution
NPT
31
-
-
-
-
6.5
10.0
14.0
26.0
33.0
60.0
-
-
-
-
-10 ... 90 °C
-10 ... 100 °C
-10 ... 90 °C
-10 ... 100 °C
-10 ... 100 °C
-10 ... 100 °C
not applicable
not applicable
Process pipe
Sterile process
0 ... 60 °C
687