SITRANS P measuring instruments for pressure
Fittings - Accessories
Compensation vessels
2/232
Siemens FI 01 · 2009
2
■
Overview
The compensation vessels prevent the level difference which oc-
curs with pressure changes in the pressure lines and which fal-
sifies the measurement.
According to DIN 19211, the temperature in the compensation
vessel must be assumed to be 50 K less than the steam temper-
ature in the pipe when calculating the wall thicknesses. This is
because the temperature in the compensation vessel during op-
eration can only rise up to the saturated steam temperature.
A material acceptance test certificate A to EN 10204-3.1 is avail-
able for the materials from which the compensation vessels are
made.
■
Characteristic curves
Permissible operating pressure as a function of the permissible operating
temperature
■
Dimensional drawings
Compensation vessel 7MF9015-1.., dimensions in mm
Compensation vessel 7MF9015-5.., dimensions in mm
0
1
00
2
00
300
4
00
bar
°C
0
1
00
2
00
300
4
00
5
00
5
00
6
00
E
D
C
B
A
O
p
era
t
i
n
g
p
re
ss
ure
O
p
era
t
i
n
g
t
em
p
era
t
ure
1
00
88
,
9
1
00
I
O
O Output (see Ordering data for dimensions)
I
Input (see Ordering data for dimensions)
65
3
5
1
)
58
1
)
I
O
a
pp
r
o
x
.
11
0
I
Input (see Ordering data for dimensions)
O Output (see Ordering data for dimensions)
1
) 30 mm longer with 7MF9015-5A.
Selection and Ordering data
Compensation vessel,
without certificate
Max.
working
pressure
Characteristic
1)
Material
Mat. No. Connections
Approx.
contents
cm³
Approx.
weight
kg
Order No.
Input
Output
7 M F 9 0 1 5 -
7 7
A
160 bar
A
16 Mo 3
1.5415
Threaded socket G½,
form R, DIN 19207
Threaded socket G½,
form V, DIN 19207
250
0.8
1 A
250 bar
B
16 Mo 3
1.5415
Welding sleeve
∅
21 mm × 6.3 mm
Welding sleeve
∅
21.3 mm × 6.3 mm
250
0.8
1 B
250 bar
B
16 Mo 3
1.5415
Welding sleeve
∅
24 mm × 7.1 mm
Welding sleeve
∅
24 mm × 7.1 mm
250
1
1 C
250 bar
C
11 CrMo 9 10
1.7383
Welding sleeve
∅
24 mm × 7.1 mm
Welding sleeve
∅
24 mm × 7.1 mm
250
1
1 D
250 bar
B
16 Mo 3
1.5415
Welding sleeve
∅
33.7 mm × 4.5 mm
Welding sleeve
∅
24 mm × 7.1 mm
250
0.7
1 E
160 bar
A
16 Mo 3
1.5415
Threaded socket G½,
form R, DIN 19207
Threaded socket G½,
form V, DIN 19207
20
1.6
5 A
500 bar
D
16 Mo 3
1.5415
Welding sleeve
∅
21 mm × 6.3 mm
Welding sleeve
∅
21.3 mm × 6.3 mm
20
1.6
5 B
500 bar
D
16 Mo 3
1.5415
Welding sleeve
∅
24 mm × 7.1 mm
Welding sleeve
∅
24 mm × 7.1 mm
20
1.6
5 C
500 bar
E
11 CrMo 9 10
1.7383
Welding sleeve
∅
24 mm × 7.1 mm
Welding sleeve
∅
24 mm × 7.1 mm
20
1.6
5 D
Accessories
Factory test certificate EN 10204–2.2
7MF9000-8AB
Material acceptance test certificate EN 10204-3.1
7MF9000-8AD
1)
See Figure "Permissible working pressure as a function of the permissible working temperature"
© Siemens AG 2008