4
3 R 74 en
1.4
Technical specifications
Face-to-face length:
RA: Neles length
RE, RE1: acc. to IEC/DIN 534-3-2
Body rating:
RA: ASME Class 300 or PN 40
RE, RE1: ASME Class 300 or
PN 50/PN 40
Max. pressure differential: see Figs. 5 and 6
Temperature range:
see Fig. 4
Flow direction:
indicated by an arrow on the body
Dimensions: see
Section
11
Weights:
see Section 11
Note that max. shut-off and max. throttling pressures
are based on mechanical maximum differential pres-
sures at ambient temperature. You must always
observe flowing temperature and flange rating when
concluding applicable pressure values. In practice you
must also check noise level, cavitation intensity, velocity,
actuator load factor, etc. using Nelprof.
1.5
Valve approvals
The valve meets the Fire-safe requirements of BS6755/
API 607 Edition 3.
1.6
CE marking
The valve meets the requirements of the European
Directive 97/23/EC relating to pressure equipment, and
has been marked according to the Directive.
Fig. 4
Maximum pressure differentials of standard
valve bodies
Fig.
5
Maximum pressure differentials in on-off
operation
Temperature (˚C)
ASME 300
Temperature (˚F)
Pressure (bar)
Pressure (psi)
CF8M
WCB
100
200
300
400
500
120
100
80
60
40
20
0
0
100
200
300
1600
1400
1200
1000
800
600
400
200
PN 40
PN 25
PN 16
PN 10
ASME 150
Temperature (°F)
100
200
300
400
500
0
100
200
300
Temperature (°C)
Pressure (bar)
Pressure (psi)
50
40
30
20
10
0
600
400
200
R_DN 200-250
R_DN 300-700
R_DN 100-150
R_DN 25-80
Fig.
6
Maximum pressure differentials in control
operation
Table 1
Differential pressure data
Valve size
Max. shut-off
Δ
p at ambient
temperature, bar
Max. throttling
Δ
p (R) at ambient
temperature, bar
Max. throttling
Δ
p (Q-R) at ambient
temperature, bar
1" / 025
1 1/2" / 040
2" / 050
3" / 080
4" / 100
6" / 150
8" / 200
10" / 250
12" / 300
14" / 350
16" / 400
20" / 500
24" / 600
28" / 700
50
50
50
50
40
40
35
35
30
30
30
30
30
30
35
35
35
35
25
25
25
20
10
10
10
10
10
10
35
35
35
35
18
18
15
10
8
8
8
8
8
8
Temperature (°C)
Temperature (°F)
100
200
300
400
500
600
400
200
50
40
30
20
10
0
0
100
200
300
Pressure (bar)
Pressure (psi)
Q-R_DN25-80, R_DN25-80
R_DN100-200
R_DN250
Q-R_DN100-150
Q-R_DN200
Q-R_DN250, R_DN300-700
Q-R_DN300-700
