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Diaphragm size
DN
15
25
20
25
32
40
40
50
50
65
65
80
80
100
100
125
125
150
150
200
200
250
250
300
300
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 IEC 534 standard, inlet pressure 6 bar, ∆p 1 bar, valve body material cast iron EN-GJL-250 and flanges
EN 1092 length EN 558-1 series 1 and soft elastomer diaphragm.
7
Order data
7.1
Order data GEMÜ 674
Body configuration
2/2-way
Connection
Threaded sockets DIN ISO 228
Valve body material
EN-GJL-250, GG 25 (cast iron)
Order example
Type
Nominal size
Body configuration (code)
Connection (code)
Valve body material (code)
Diaphragm material (code)
Control function (code)
Other valve body materials, linings and diaphragm materials upon request.
Operating pressure [bar]
EPDM
PTFE
10
6.0
10
6.0
10
6.0
10
6.0
10
6.0
10
6.0
10
6.0
8
5.0
5
3.0
4
2.5
4
2.5
Code
D
Code
1
Code
8
674
674
21 / 36
Kv value
[m
/h]
3
7
14
20
36
40
80
100
160
238
376
496
964
1790
2240
Diaphragm material
NBR, Perbunan
CR, Neoprene
EPDM
Control function
Manually operated
15
D
15
D
Weight [kg]
Connection
Connection
code 1
code 8
1.65
3.15
1.70
3.70
1.85
4.12
3.50
7.00
3.75
7.90
5.25
10.40
-
16.20
-
23.40
-
33.80
-
50.00
-
62.00
-
155.00
-
285.00
-
335.00
Code
Code
1
8
24
1
8
24
674, 675
2
8
24
0
0
0
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