Series BPV - SCHROEDAHL

Series BPV
Back Pressure Valve to assure
a defined back pressure
Application
Even the optimised and sophisticated pressure
reduction methods of SCHROEDAHL minmum flow
valves and SCHROEDAHL control valves are put
to their limits on the extreme conditions in some
plants.
It is in just such cases that SCHROEDAHL Back
Pressure Valves are put to work. They increase the
clearance of the media evaporation pressure by generating a defined pressure differential. Unwanted
evaporation and cavitation is prevented, ensuring
gentle and cushioned operation.
Carefully matching the operating parameters between the feedback recirculation valves along with
control and Back Pressure Valve guarantees ideal
plant operation.
2
Description
Function
Installation
The designed pressure difference of the Back
Pressure Valve pushes the bushing 204 against
the compressed spring 237 in the direction of flow.
That in turn releases the throttle opening on the bushing until the specified pressure difference is set.
The BPV is placed in the pipeline wherever a high
pressure level is required. We recommend installing
the BPV’s just before the evaporator or feed water
tank.
219 203
204.1
207
201
206
237
204
208
Fig. 1: BPV closed
Fig. 2: BPV open
Sizes and pressure stages
Materials
The BPV valves are supplied from DN 25 (1”) to DN
150 (6”) from PN 16 (150 lbs)to PN 400
(2500 lbs) (special sizes on request)
Standard housing materials:
W.-Nr. 1.0460 (C22.8) ASTM A105
W.-Nr. 1.4404 (X2CrNiMo17132) ASTM 316L
The standard internals of the valves are of stainless
steel with a minimum chrome content made of 13%.
Other forged materials for housing and internals are
available upon request. Selection of the seal material
is done according to medium and temperature conditions. The housing material is selected according to
medium pressure and temperature conditions.
Connection
They are available for installation between flanges
according to DIN and ASME. Other standards
available on request (e.g. BS, NF...).
Pos. Piece Designation
Material
201
Housing
Carbon / Chromium steel
1
203
1
O-Ring
EPDM/NBR/FFPM...*
204
1
Bushing
Chromium steel/corrosion-resistant
204.1
1
Perforated disk Chromium steel/corrosion-resistant
206
1
Bushing
Chromium steel/corrosion-resistant
207
1
Guide ring
High performance thermoplastic
208
1
Guide ring
High performance thermoplastic
219
2
Set screw
Chromium steel/corrosion-resistant
237
1
Coil springs
Chromium steel/corrosion-resistant
* Media-dependent
3
Standard types
L
Fitting sizes and weights
DIN
ASME
Q<30m³/h
Cat.-no.:
DN
Q<180m³/h
PN
DN
lbs
L [mm]
kg
L [mm]
kg
L [mm]
kg
BPV 055...
63
300
5
-
-
-
-
BPV 056...
100
600
5
-
-
-
-
5
-
-
-
-
5
-
-
-
-
BPV 057...
BPV 058...
25
160
250
1"
900
1500
120
BPV 059...
320
-
6
-
-
-
-
BPV 050...
400
2500
8
-
-
-
-
BPV 065...
63
300
6
-
-
-
-
BPV 066...
100
600
6
-
-
-
-
7
-
-
-
-
7
-
-
-
-
BPV 067...
BPV 068...
32
160
250
1¼"
900
1500
150
BPV 069...
320
-
10
-
-
-
-
BPV 060...
400
2500
10
-
-
-
-
BPV 075...
63
300
10
-
-
-
-
BPV 076...
100
600
10
-
-
-
-
10
-
-
-
-
11
-
-
-
-
BPV 077...
BPV 078...
40
160
250
1½"
900
1500
150
BPV 079...
320
-
13
-
-
-
-
BPV 070...
400
2500
17
-
-
-
-
BPV 085...
63
300
13
-
-
-
-
-
-
23
-
-
25
-
-
BPV 086...
BPV 087...
BPV 088...
4
Q<140m³/h
Fitting length/weight Fitting length/weight Fitting length/weight
50
100
160
250
2"
600
900
1500
160
14
14
15
260
DIN
ASME
Q<30m³/h
Cat.-no.:
DN
BPV 089...
BPV 080...
Q<140m³/h
Q<180m³/h
Fitting length/weight Fitting length/weight Fitting length/weight
50
PN
320
400
DN
2"
lbs
2500
L [mm]
160
kg
18
22
L [mm]
260
kg
L [mm]
kg
29
-
-
36
-
-
BPV 095...
63
300
19
31
-
-
BPV 096...
100
600
20
33
-
-
33
-
-
38
-
-
BPV 097...
BPV 098...
65
160
250
2½"
900
1500
160
20
23
260
BPV 099...
320
-
29
46
-
-
BPV 090...
400
2500
36
59
-
-
BPV 105...
63
300
22
35
-
-
BPV 106...
100
600
23
38
-
-
38
-
-
46
-
-
BPV 107...
BPV 108...
80
160
250
3"
900
1500
160
23
29
260
BPV 109...
320
-
36
58
-
-
BPV 100...
400
2500
42
69
-
-
BPV 115...
63
300
32
50
-
-
BPV 116...
100
600
34
54
-
-
54
-
-
68
-
-
BPV 117...
BPV 118...
100
160
250
4"
900
1500
170
34
43
270
BPV 119...
320
-
55
87
-
-
BPV 110...
400
2500
69
109
-
-
BPV 125...
63
300
46
74
76
BPV 126...
100
600
49
78
81
BPV 127...
160
900
49
78
BPV 128...
125
250
5"
1500
170
61
270
98
280
81
101
BPV 129...
320
-
79
125
130
BPV 120...
400
2500
95
151
157
BPV 135...
63
300
83
121
121
BPV 136...
100
600
90
130
130
BPV 137...
BPV 138...
150
160
250
6"
900
1500
220
90
110
320
130
159
320
130
159
BPV 139...
320
-
131
191
191
BPV 130...
400
2500
164
239
239
Applies only to pipeline installation between flanges according to DIN / ASME
5
Code key
BPV
-
Nominal width
DN 25
DN 32
DN 40
DN 50
DN 65
DN 80
DN 100
DN 125
DN 150
1"
1¼"
1½"
2"
2½"
3"
4"
5"
05
06
07
08
09
10
11
12
6"
13
Nominal pressure
PN 16
PN 25
PN 40
PN 63
PN 100
PN 160
PN 250
PN 320
lbs 150
lbs 300
lbs 600
lbs 900
lbs 1500
PN 400
lbs 2500
2
3
4
5
6
7
8
9
0
Pipeline installation
*Install between flanges according to DIN
*Install between flanges according to ASME
Special model
F
U
S
Volumetric flow rate
< 30 m³/h
< 140 m³/h
< 180 m³/h
Other requirements
1
2
3
4
Materials
*Carbon steel DIN/ ASTM: 1.0460/ A105
Chromium steel DIN/ ASTM 1.4404/ 316L
Special material
* Standard version
Example: BPV118F2-CS (DN100, PN250, Install between flanges, volume flow <140m³/h, Material: DIN 1.0460)
6
CS
SS
SX
Back Pressure Valve
Technical Data
Customer:
Datasheet:
Enquiry no.:
Quantity:
Prior reference:
Ident-No.:
Order no.:
Project:
Back Pressure Valve type:
Valve inlet [in.]
DN
PN
Code:
Valve outlet [in.]
DN
PN
Paint:
Mat.-/test certificates:
Materials
Internals:
Housing:
Design data:
Seals:
Design temp.:
°C
Design pressure:
bar g
Load data:
Q=
t =
m³/h
°C
P1*=
bar g
P2 =
S.G.:
Medium:
bar g
kg/dm³
Notes:
Revision
Date
Description
Back
pressure
valve
Q
Pump
t
Name
Signature
Tank
P
P1
P2
* Will be defined / approved by SCHROEDAHL
7
XYQOM | www.xyqom.net
SCHROEDAHL-ARAPP
Spezialarmaturen GmbH & Co. KG
Schoenenbacher Str. 4
51580 Reichshof-Mittelagger
Germany
Phone +49 2265 9927-0
Fax +49 2265 9927-927
www.schroedahl.com
info@schroedahl.com
SCHROEDAHL International Corporation
2400 Augusta Dr. Suite 285
Houston, Texas 77057
United States of America
Phone +1 713 9758351
Fax +1 713 7800421
sic@schroedahl.com