Welker Engineering Pte. Ltd. Product Catalog 2002
Control ValvesGas ProductsInstrument Regulators/Filters and Filter dryersLight Liquid Samplers
CylindersCrude Oil SamplersInjection SystemsMiscellaneous
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Control Valves
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Welker JET® Capacity Equation

 
size
cg
Cv
C1
N
NF&TE
N
NF&TE
1"
699
38
35
18.3
20.44
2"
2044
107
96
19.1
21.23
4"
5708
318
286
17.94
19.94
6"
13170
658
592
20.0
22.24
8" X 10"
15633
868
781
18.0
20.01
8" X 12"
23744
1319
1187
18.0
20.00

WELKER JET Control Valves can be matched to a relief valve by using capacity restricting rear plates

 
SIZE
NS TYLE
NF STYLE "A" DIM
TE STYLE "A" DIM
A DIM
B DIM
150
ANSI
300
ANSI
600
ANSI
150
ANSI
300
ANSI
600
ANSI
1"
IN
4.56
1
7.25
7.75
8.25
7.25
7.75
8.25
MM
115.8
25.4
184.2
196.9
209.6
184.2
196.9
209.6
2"X10"
IN
-
-
10.5
10.5
11.25
10.5
10.5
11.25
MM
-
-
266.7
266.7
285.8
266.7
266.7
285.8
2"
IN
7.31
1.125
10
10.5
11.25
10
10.5
11.25
MM
185.7
28.6
254
266.7
285.8
254
266.7
285.8
4"
IN
10.75
1.125
13.875
14.5
15.5
13.875
14.5
15.5
MM
273.1
28.6
352.4
368.3
393.7
352.4
368.3
393.7
6"
IN
18.625
2.25
17.75
18.625
20
25
25
25
MM
473.1
57.2
450.9
473.1
508
635
635
635
8"
IN
-
-
21.38
23.38
24
32
32
32
MM
-
-
543.1
593.9
609.6
812.8
812.8
812.8
8"X10"
IN
24.5
2.5
-
-
-
-
-
-
MM
622.3
63.5
-
-
-
-
-
-
8"X12"
IN
24.5
2.5
-
-
-
-
-
-
MM
622.3
63.5
-
-
-
-
-
-

Copyright 2007 Welker Engineering Company Pte Ltd.