Schroeder - Pump Protection Brochure - Dimensions · PDF fileINFO INFO 1,QTXLU\...
Transcript of Schroeder - Pump Protection Brochure - Dimensions · PDF fileINFO INFO 1,QTXLU\...
1
Version 1.0
INFO
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1INFOINFO
The Compensating Bypass Check Valve is a pump
protection device. It automatically protects centrifu-
gal pumps from damage which might occur through
partial evaporation of the pump contents during low
load operation. Every Compensating Bypass Check
Valve is designed particularly for the necessary
pumps and plant data. Please transmit the following
data for a particular valve design to:
Schroeder Valves GmbH & Co. KG
Company: Project:
Name: Quantity:
Phone: Inquiry-No.:
Fax: Date:
1. Non return valve in the bypass branch * no yes
2. Installation * vertical horizontal
3. Variable Pump Speed * no yes
4. Medium *
5. Density * [kg/m3]
6. Operating Temperature * [°C] [°F]
7. Standards * DIN ANSI Other
8. Max. Capacity Qmax
[m3/h]
9. Design Capacity Q100%
* [m3/h]
10. Total Head at Q100%
* [m]
11. Bypass Flow QBy
* [m3/h]
12. Total Head at QBy
* [m]
13. Pump inlet pressure * [bar]
14. Back pressure on bypass branch [bar]
15. Valve pressure rating
16. Valve Flange size / rating inlet outlet bypass
17. Valve Flange sealing
18. Additional branch yes, function
19. Pump curve attached no yes
In case of pump protection the SR/SA-type is
highly associated with modern process control and
be precisely adjusted to customers resp. plant
requirements.
Please transmit the following data for a particular
valve design to:
Schroeder Valves GmbH & Co. KG
Company: Project:
Name: Quantity:
Phone: Inquiry-No.:
Fax: Date:
1. Type of power SR SA Preferred company and type:
1.1 electric
1.2 pneumatic
1.3 hydraulic
1.4 medium conrolled (only SA)
2. Accessories
3. Technical Data 4. Preferred type
Pressure rate pD
[bar] angle type
Temperature TD
[°C] z-type
Medium straight through
Density [kg/m3]
5. Process data
Loading condition I II III IV
Flow rate Q [m3/h]
Inlet pressure pi [bar]
Outlet pressure po [bar]
max [bar]
Inlet temperature Ti [°C]
6. Pipe connection
Flange DN Inlet
Welding end DN Outlet
Others Material
1INFOINFO
Our Special-Compensating Bypass Check Valves and
our Multiport Throttles are designed according to the
AD 2000 Standard (e.g. in calculation and choice of
material).
and particularly to EN 13445. As per Pressure Equip-
ment Directive 97/23 EG the products are provided
with the CE marking and the Declaration of Confor-
Equipment Directive 97/23 EG) all dangerous material
classes of category 1 to 4 are covered.
All pressure holding parts of our products are built from
For all products you can get acc. to standard
EN 10204
• a Test report 2.2 or
since 1995 and according to the new DIN EN ISO
9001:2000 since 2003.
water, 134 °C
density in operat. temp. 0.93 kg/dm3
100% 63 m3/h
head in Q100% 288 m
The Compensating Bypass Check Valves do not
only protect pumps from damages. Compared with a
plant. Example:
operating time p.a. 330 days per 24h
cost of energy
NPSHR
By12 m3/h 325 m 0.38 1.7 m
100%63 m3/h 288 m 0.73 2.4 m
QBy
+ Q100%
75 m3/h 288 m 0.76 3.1 m
QBy 26 kW 26 kW –
energy costs (p.a.)
By
10,300,- E 10,300,- E –
Q100% 72 kW 63 kW
energy costs (p.a.)
100%
28,500,- E 24,900,- E E
E
2
SSSSV 10-12
Special Compensating Bypass
Check Valve
2
SSV
10-12
The Compensating Bypass Check Valves of the
ranges from –250 °C up to +400 °C. The valves are
manufactured in the sizes DN 25 to DN 500 and the
range of nominal pressure is PN 10 up to PN 400
35%.
The valve operates without additional auxiliary
energy.
of above 2200 m we recommend the range SMA
63/64 (see prospect) with „ON-OFF-regulation“ of
the bypass.
controlled, that means the non-return cone (3) is kept
is designed in such a way, that the cone reaches its
The non-return cone activates the Rotary Slide Valve
(13) in the bypass by means of a lever (14). If the
cone is positioned on the cone seat, the Rotary Slide
Valve is completely open. It closes correspon-
ding to the rising of the cone by delivery in main
direction. The valve just allows such an amount of
Valves SSV should preferably be connected directly
to the pump discharge branch, and must be mounted
possibilities for horizontal installation exist, but
All bypass valve components are easily serviced.
To facilitate serving of the bypass valve, we
recommend installing a pressure relieve valve and a
stop valve. The stop valve must be of a type which
can be locked in the OPEN position.
scheme of our Compensating Bypass Check Valve.
The hand-operated bypass feature is optional.
In order to avoid vibrations in the valve and the
pipes we recommend continuing the connecting line
at the outlet (DN2) and Bypass branch (DN3) for
approx. 2-3 m in the chosen nominal size. A pipe
bend directly at the bypass branch is not admissible.
SSVSSV
The Compensating Bypass Check Valve type SSV
10-12 is a pump protection device. It automatically
protects centrifugal pumps – especially those
handling hot water – from damage which might
occur through partial evaporation of the water
content during low load operation.
As soon as the pump capacity drops below a prede-
-
valve to the boiler or process is completely shut off.
The pressure will be reduced by integrated throttle
stages within the bypass.
The type SSV 12 is supplied with a larger Bypass.
differential pressure. The choice is done in our works.
viscosity < 150 cSt without solids, e.g.:
• in boiler feed water and cooling water plants
• in Petrochemical and Chemical Industry and
refrigeration
• in potable water supply and backwater disposal
• Offshore
• in snow production
• in steel production
The utilization in nuclear power plants emphasizes
2
SSV
10-12
Lower body Part-No. 1
Upper body Part-No. 2
Cone Part-No. 3
Cone guide Part-No. 4
Cone guide Part-No. 5
Bypass branch Part-No. 10
Valve head casing Part-No. 12
Rotary slide valve Part-No. 13
Operating lever Part-No. 14
Throttle Part-No. 15
Hand-op. branch Part-No. 24
Multi-port throttle Part-No. 25
O-Ring Part-No. 78.1
O-Ring Part-No. 78.2
Socket screw Part-No. 91.1
Socket screw Part-No. 91.2
Dowel pin Part-No. 94.1
Dowel pin Part-No. 94.2
Coil spring Part-No. 95.1
(95.2)
Coil spring Part-No. 95.3
Bypass Valve Head, complete Part-No. 60, consisting of:
Casing Part-No. 12
Rotary slide valve Part-No. 13
Operating lever Part-No. 14
Dowel pin Part-No. 94.1
Dowel pin Part-No. 94.2
Throttle in the Bypass Branch, consisting of:
Throttle Part-No. 15
O-Ring Part-No. 78.2
Single Spare Parts
O-Ring Part-No. 78.1
Coil spring Part-No. 95.1
(95.2)
SSVSSV
AD 2000 and particularly to EN 13445. As per
Pressure Equipment Directive 97/23 EG the products
are provided with the CE marking and the Declara-
-
le H1 (Pressure Equipment Directive 97/23 EG) all
dangerous material classes of category 1 to 4 are
covered. Suitable nominal size and nominal pressure
are to be chosen according to the pump pressure
branch. However, it must be observed, that the
exceeded (guarantee). Compensating Bypass Check
Valves in larger sizes, for higher pressures and in
special designs, which are not listed here, can also
be supplied (on request).
result in vibrations within the plant, a hammering
Compensating Bypass Check Valve resp. a damage
-
tion“).
The Valve SSV comprises a radial split body with
non-return cone (3), and a separate bypass device
in the bypass branch.
All sliding parts are machined from proven stainless
steels suitably matched to each other. Parts subjects
to wear such as the check valve seat are stellite-
faced. The coil springs are also made of stainless
steel. In the standard version the casing is of forged
steel P250GH (1.0460). In addition high-quality
steels of various qualities can be supplied.
-
matically by the Bypass valve head (12).
The pressure reduction from pump pressure to the
counter pressure in the bypass line takes place via
the Bypass Valve Head (12) and the throttle (15), for
higher pressure with multistage throttles.
The hand operating branch with multiport-throttle is
valve combination. We recommend the branch for
protection of the internal bypass parts at extreme
operating conditions, e.g. at high differential pres-
sures and frequent operation in the range of bypass
Start-Up-Trim (SUT) substitutes the Bypass valve
head during cleaning and start-up of plants and
therefore spares the sophisticated regulating parts
(optional, permanently open Bypass outlet). Also
usable instead of the Hand operating branch
Warm-up branch, pressure gauge branch, draining
branch etc. can be provided, if required.
Flange designs to DIN, ANSI, BS, ISO and all rela-
ted standards are possible.
• Compensating Bypass Check Valves with control
disc and bearing plate in the bypass for high
• Autonomous Minimum Flow System Type
SMA 63/64 from DN 65 up-wards at pump
pressures from PN 250 - 400 bar.
of high-pressure media from DN 15 upwards and
pressures from PN 10 to PN 640 bar.
2
SSV
10PN H S
80
10-40 7.38
80
254050
25
310 120220220240
120 220454649
3
63 7.38 4.59254050
350 130230230250
130 230596061
5
100 7.38 4.59 3.50254050
370 130240240260
130 240727377
5
160 5.57 4.04 3.23254050
370 130240240260
130 240727374
6
250 5.57 4.04 3.23254050
400 150250250270
150 250102103107
8
100
10-40 11.00
100
405065
380
380 145280280300
145 280757679
3
63 11.00 6.85405065
390 145280280300
145 2809697
1006
100 11.00 6.85 5.22405065
430 155300300320
155 300116117121
6
160 8.34 6.04 4.83405065
430 155300300320
155 300116117121
7
250 8.34 6.04 4.83405065
500 180320320340
180 320183185190
9
125
10-40 17.71
125
405065
40
440 165360360380
165 360192118123
4
63 17.71 12.01405065
460 165360360380
165 360158160165
7
100 17.71 12.01 9.36405065
500 170360360380
170 360192194200
9
160 12.68 10.02 8.32405065
500 170360360380
170 360192194200
10
250 12.68 10.02 8.32405065
570 190380380400
190 380264267274
12
150
10-40 22.78
150
506580
50
500 190380390410
190 380179181186
7
63 22.78 16.12506580
520 190400400420
190 400229231236
10
100 22.78 16.12 12.75506580
580 190400400420
190 400261264270
13
160 18.73 14.47 11.88506580
580 190400400420
190 400288291297
15
250 18.73 13.49 11.32506580
630 220420420440
220 420378381389
19
SSVSSV
PN H S
32
10-40 2.48
32
1525
25
240 93165165 93 165
1819 2
63 2.48 1.811525 3
100 2.48 1.81 1.441525 3
1601525 3.5
2501525 4.5
40
10-40 2.48
40
152532
25
220 78170170180
78 170192022
2
63 2.48 1.81152532
270 100190190200
100 190303133
3
100 2.48 1.81 1.44152532
270 100190190200
100 190303133
3
160 2.25 1.71 1.40152532
270 100190190200
100 190303133
3.5
250 2.25 1.71 1.40152532
300 115195195200
115 195414244
4.5
50
10-40 3.21
50
152532
25
250 90180180200
90 180272830
2
63 3.21 2.03152532
250 105200200
105 200363739
3
100 3.21 2.03 1.55152532
290 105200200
105 200434446
3
160 2.93 1.96 1.51152532
290 105200200
105 200434446
3.5
250 2.93 1.96 1.51152532
330 125205205
125 205505151
4.5
65
10-40 4.42
65
254050
25
280 105200200210
105 200414244
2
63 4.42 2.99254050
320 120220225235
120 220545557
3
100 4.42 2.99 2.33254050
340 125220225235
125 220666769
3
160 3.67 2.73 2.21254050
340 125220225235
125 220666769
3.5
250 3.67 2.73 2.21254050
370 140240240250
140 240818285
4.5
2
SSV
10PN H S
150 2.48 240 93165165 96 165
1819 2
300 2.48 1.81 280 103170170 103 170
2627 3
600 2.48 1.81 1.44 29 3
900 37 3.5
1500 40 4.5
150 2.48 220 78170170180
78 170191920
2
300 2.48 1.81 270 100170170180
100 170272728
3
600 2.48 1.81 1.44 270 100190190200
100 190282931
3
900 2.25 1.71 1.40 320 125200200210
125 200363739
3.5
1500 2.25 1.71 1.40 320 125200200210
125 200394042
4.5
150 3.21 250 90180180190
90 180272829
2
300 3.21 2.03 270 100180180190
100 180323334
3
600 3.21 2.03 1.55 290 105200200210
105 200394042
3
900 2.93 1.96 1.51 325 125210210220
125 210525355
3.5
1500 2.93 1.96 1.51 350 135210210220
135 210616264
4.5
150 4.42 280 105200200210
105 200434445
2
300 4.42 2.99 300 115200200210
115 200515253
3
600 4.42 2.99 2.33 340 125220225235
125 220626465
3
900 3.67 2.73 2.21 370 140230235245
140 230757779
3.5
1500 3.67 2.73 2.21 390 150240240250
150 240919396
4.5
SSV
1) Weight of hand-operating branch
Other pipe sizes, pressure ranges and special designs are deliverable on request.
With reservation to changes of dimensions and weights.
PN H S
200
10-40 55.42
200
6580
100
65
630 240460470490
240 460360364370
10
63 55.45 30.476580
100650 240
480480500
240 480401403409
14
100 55.45 30.47 22.516580
100680 240
500500520
240 500443446454
17
160 31.78 23.96 19.476580
100720 240
520520540
240 520456459467
20
250 21.47 18.50 16.186580
100830 265
590590610
265 590700704714
27
250
10-40 67.44
250
80100125
80
730 265520520540
265 520658661667
17
63 67.44 45.0680
100125
760 265550550570
265 550696699705
22
100 67.44 45.06 34.8680
100125
840 280590590610
280 590784788796
23
160 39.82 33.27 28.4780
100125
880 280590590610
280 590810814822
29
250 37.65 31.93 27.6280
100125
1050 340700700720
340 700123412391249
59
300
10-40 100.27
300
100125150
100
860 320580580600
320 580823826832
20
63 100.27 68.81100125150
900 320640640660
320 640881884890
28
100 100.27 68.81 53.37100125150
1050 330650650670
330 650111311181126
29
160 50.79 44.56 39.57100125150
1050 330650650670
330 650111311181126
38
250 50.79 44.56 39.57100125150
1200 380740740760
380 740204320512062
75
SSV
10
SSV
2
SSV
10PN H S
150 55.42 630 240460470490
240 460360362368
10
300 55.42 30.47 650 240480480500
240 480390392398
14
600 55.42 30.47 22.51 680 240500500520
240 500442445453
17
900 31.78 23.96 19.47 750 250530530550
250 530592595603
20
1500 21.47 18.50 16.18 880 295590590610
295 590727730740
27
150 67.44 730 265520520540
265 520646648654
17
300 67.44 45.06 750 270530530550
270 530690692698
22
600 67.44 45.06 34.86 840 280590590610
280 590795800808
23
900 39.82 33.27 28.47 900 290590590610
290 590917922930
29
1500 37.65 31.93 27.62 1100 370700700720
370 700114914551465
59
150 100.27 860 320590590600
320 580816818842
20
300 100.27 68.81 880 320600600620
320 600879881887
28
600 100.27 68.81 53.37 1050 330650650670
330 350109611011110
29
900 50.79 44.56 39.57 1050 330650650670
330 650129412991308
38
1500 50.79 44.56 39.57 1250 410740740760
410 740199820052016
75
1) Weight of hand-operating branch
Other pipe sizes, pressure ranges and special designs are deliverable on request.
With reservation to changes of dimensions and weights.
SSV
PN H S
150 7.38 310 120220220240
120 220454649
3
300 7.38 4.59 330 125230230250
125 230596063
5
600 7.38 4.59 3.50 370 130240240260
130 240798084
5
900 5.57 4.04 3.23 390 140240240260
140 240848589
6
1500 5.57 4.04 3.23 430 160250255275
160 250116117121
8
150 11.00 380 145280280300
145 280777882
3
300 11.00 6.85 390 145280280300
145 280102103107
6
600 11.00 6.85 5.22 430 155300300320
155 300127128133
6
900 8.34 6.04 4.83 450 165300300320
165 300154155160
7
1500 8.34 6.04 4.83 520 190320320340
190 320194196202
9
150 17.71 450 165360360380
165 360119121126
4
300 17.71 12.01 460 165360360380
165 360158160165
7
600 17.71 12.01 9.36 500 170360360380
170 360221223229
9
900 12.68 10.02 8.32 530 185360370390
185 360258261268
10
1500 12.68 10.02 8.32 630 230390390410
230 390341344351
12
150 22.78 500 190380380400
190 380178179184
7
300 22.78 16.12 520 190400400420
190 400224227333
10
600 22.78 16.12 12.75 580 190400400420
190 400273
2728213
900 18.73 14.47 11.88 600 200410420430
200 410335337344
15
1500 16.73 13.49 11.32 700 260420420440
260 420410413421
19
SSV
2
SSV
12PN H S
100
10-40 17.71
100
405065
40
410 160350350370
160 350104105110
3
63 17.71 11.77405065
420 160350350370
160 350125126131
6
100 17.71 11.77405065
460 170350350370
170 350132134140
6
160 17.71 11.77405065
480 170350350370
170 350132134140
7
250405065
125
10-40 18.73
125
506580
50
470 180380390140
180 380120123129
4
63 18.73 14.24506580
100506580
160506580
250506580
150
10-40 48.16
150
6580
100
65
520 190420430450
190 420183186193
7
63 48.16 42.566580
100
100 48.16 42.566580
100620 210
460460480
210 480278281290
13
160 48.16 42.566580
100620 210
490490510
210 490320323331
15
2506580
100
200
10-40 39.82
200
80100125
80
650 240490490510
240 490366370376
1
63 39.82 32.8780
100125
680 270520520540
270 520409411418
14
10080
100125
16080
100125
25080
100125
SSV
PN H S
40
10-40 2.93
40
152540
25
220 78170170180
78 170191920
2
63 2.93 1.91152540
3
100152540
160152540
250152540
50
10-40 3.67
50
254050
25
260 95200200210
95 200333538
2
63 3.67 2.67254050
300 120220225235
120 220424447
3
100254050
160254050
250254050
65
10-40 5.57
65
254050
25
290 110220220240
110 220474851
2
63 5.57 3.96254050
330 125230230250
125 230606164
3
100254050
160254050
250254050
80
10-40 8.34 5.92
80
405065
40
330 130280280300
130 280505154
3
63 8.34 5.92405065
100 8.34 5.92405065
400 150300300320
150 300939498
5
160 8.34 5.92405065
400 150300300320
150 300939498
6
250405065
SSV
2
SSV
12PN H S
150 2.93 220 78170170180
78 170191920
2
300 2.93 1.91 270 100170170180
100 170272728
3
600
900
1500
150 3.67 250 90200200210
90 200293032
2
300 3.67 2.67 280 105200200210
105 200353638
3
600
900
1500
150 5.57 290 110220220230
110 220474850
2
300 5.57 3.96 310 120230230250
120 230555659
3
600
900
1500
150 8.34 5.92 330 130280280300
130 280505155
3
300 8.34 5.92 350 135280280300
135 280626367
600 8.34 5.92 390 140300300320
140 300858691
5
900 8.34 5.92 410 150300300320
150 300105106111
6
1500
SSV
SSV
12PN H S
250
10-40 53.25
250
100125150
100
750 270560560580
270 560662664672
17
63 53.25 32.82100125150
100100125150
160100125150
250100125150
300
10-40 172.02
300
125150200
125
860 320580580600
320 580830832842
20
63 172.02 80.39125150200
100125150200
160125150200
250125150200
1) Weight of hand-operating branch
Other pipe sizes, pressure ranges and special designs are deliverable on request.
With reservation to changes of dimensions and weights.
SSV
2
SSV
12
1) Weight of hand-operating branch
Other pipe sizes, pressure ranges and special designs are deliverable on request.
With reservation to changes of dimensions and weights.
PN H S
150 53.25 750 270560560580
270 560662664670
17
300 53.25 32.82 770 275580580600
275 580705707716
600
900
1500
150 172.02 860 320580580600
320 580830832842
20
300 172.02 80.39 880 320580580600
320 580896898908
600
900
1500
SSV
PN H S
150 17.71 410 160350350370
160 350104106111
3
300 17.71 11.77 420 160350350370
160 350108110115
6
600 17.71 11.77 460 170360360380
170 360132134140
6
900 17.71 11.77 7
1500
150 18.73 480 180370370390
180 370125127132
4
300 18.73 14.24 500 180390390410
180 390164166171
600
900
1500
150 48.16 520 190420430450
190 420183185191
7
300 48.16 42.56 540 190440440460
190 440229232238
600 48.16 42.56 620 210460460480
210 460287281289
13
900 48.16 42.56 640 220500500520
220 500340343351
15
1500
150 39.82 650 240490490510
240 490368370376
1
300 39.82 32.87 690 260500500520
260 500398400406
14
600
900
1500
SSV
3
S S
SSV 18-20
Special Compensating Bypass
Check Valve
3
SSV
18-20
SSV
The Compensating Bypass Check Valves of the
ranges from –250°C up to +400°C. The valves are
manufactured in the sizes DN 25 to DN 500 and the
range of nominal pressure is PN 10 up to PN 400
to 35%.
The valve operates without additional auxiliary
energy.
of above 2200 m we recommend the range SMA
63/64 (see prospect) with „ON-OFF-regulation“ of
the bypass.
controlled, that means the non-return cone (3) is kept
is designed in such a way, that the cone reaches its
The non-return cone activates the Rotary Slide Valve
(13) in the bypass by means of a lever (14). If the
cone is positioned on the cone seat, the Rotary Slide
Valve is completely open. It closes corresponding to
the rising of the cone by delivery in main direction.
as it is necessary for supplement of the required
Valves SSV should preferably be connected directly
to the pump discharge branch, and must be mounted
possibilities for horizontal installation exist, but
All bypass valve components are easily serviced.
To facilitate serving of the bypass valve, we
recommend to install a pressure relieve valve and a
stop valve. The stop valve must be of a type which
can be locked in the OPEN position.
scheme of our Compensating Bypass Check Valve.
The hand-operated bypass feature is optional.
In order to avoid vibrations in the valve and the
pipes we recommend continuing the connecting line
at the outlet (DN2) and Bypass branch (DN3) for
approx. 2-3 m in the chosen nominal size. A pipe
bend directly at the bypass branch is not admissible.
SSV
Compared to the series SSV 10-12, the series SSV
18-20 uses an integrated non-return valve in the by-
pass. It automatically protects centrifugal pumps –
especially those handling hot water – from damage
which might occur through partial evaporation of the
water content during low load operation.
As soon as the pump capacity drops below a prede-
-
valve to the boiler or process is completely shut off.
The pressure will be reduced by integrated throttle
stages within the bypass.
The type SSV 20 is supplied with a larger bypass.
differential pressure. The choice is done in our
works.
-
cosity < 150 cSt without solids, e.g.:
• in boiler feed water and cooling water plants
• in Petrochemical and Chemical Industry and
refrigeration
• in potable water supply and backwater disposal
• Offshore
• in snow production
• in steel production
The utilization in nuclear power plants emphasizes
3
SSV
18-20
Lower body Part-No. 1
Upper body Part-No. 2
Cone Part-No. 3
Cone guide Part-No. 4
Cone guide Part-No. 5
Bypass branch Part-No. 10
Valve head casing Part-No. 12
Rotary slide valve Part-No. 13
Operating lever Part-No. 14
Throttle Part-No. 16
Non-Return Valve Part-No. 17
Hand-op. branch Part-No. 24
Multi-port throttle Part-No. 25
O-Ring Part-No. 78.1
O-Ring Part-No. 78.2
Socket screw Part-No. 91.1
Socket screw Part-No. 91.2
Coil spring Part-No. 95.1
(95.2)
Coil spring Part-No. 95.3
Bypass Valve Head, complete Part-No. 60 consisting of:
Casing Part-No. 12
Rotary slide valve Part-No. 13
Operating lever Part-No. 14
Dowel pin Part-No. 94.1
Dowel pin Part-No. 94.2
Non-Return Valve in the Bypass Branch, complete, consisting of:
Throttle Part-No. 16
Non-Return Valve Part-No. 17
O-Ring Part-No. 78.2
Coil spring Part-No. 95.3
Single Spare Parts
O-Ring Part-No. 78.1
O-Ring Part-No. 78.2
Coil spring Part-No. 95.1
(95.2)
Coil spring Part-No. 95.3
SSVSSV
AD 2000 and particularly to EN 13445. As per
Pressure Equipment Directive 97/23 EG the products
are provided with the CE marking and the Declaration
H1 (Pressure Equipment Directive 97/23 EG) all
dangerous material classes of category 1 to 4 are
covered. Suitable nominal size and nominal pressure
are to be chosen according to the pump pressure
branch. However, it must be observed, that the
exceeded (guarantee). Compensating Bypass Check
Valves in larger sizes, for higher pressures and in
special designs, which are not listed here, can also
be supplied (on request).
result in vibrations within the plant, a hammering
Compensating Bypass Check Valve resp. a damage
-
tion“).
The Valve SSV comprises a radial split body with
non-return cone (3), and a separate bypass device
in the bypass branch.
All sliding parts are machined from proven stainless
steels suitably matched to each other. Parts subjects
to wear such as the check valve seat are stellite-
faced. The coil springs are also made of stainless
steel. In the standard version the casing is of
forged steel P250GH (1.0460). In addition high-
quality steels of various qualities can be supplied.
-
tically by the Bypass valve head (12). The pressure
reduction from pump pressure to the counter pressure
in the bypass line takes place via the Bypass Valve
Head (12), the throttle (16) and the valve (17) for
type SSV 18/20.
The hand operating branch with multiport-throttle is
valve combination. We recommend the branch for
protection of the internal bypass parts at extreme
operating conditions, e.g. at high differential pres-
sures and frequent operation in the range of bypass
Start-Up-Trim (SUT) substitutes the Bypass valve
head during cleaning and start-up of plants and
therefore spares the sophisticated regulating parts
(optional, permanently open Bypass outlet). Also
usable instead of the Hand operating branch
Warm-up branch, pressure gauge branch, draining
branch etc. can be provided, if required.
Flange designs to DIN, ANSI, BS, ISO and all
related standards are possible.
• Compensating Bypass Check Valves with control
disc and bearing plate in the bypass for high
• Autonomous Minimum Flow System Type
SMA 63/64 from DN 65 up-wards at pump
pressures from PN 250 – 400 bar.
of high-pressure media from DN 15 upwards and
pressures from PN 10 to PN 640 bar.
3
SSV
18PN H S
65
10-40 3.87
65
254050
40
280 105205205215
105 205414244
2
63 3.87254050
320 120220225235
120 225535558
3
100 3.87254050
340 125220225235
125 225656770
3
160 3.34254050
340 125220225235
125 225656770
3.5
250 3.34254050
370 140240240250
140 240808286
4.5
80
10-40 6.45
80
254050
40
310 120245230250
120 230484650
3
63 6.45254050
350 130245230250
130 230626064
5
100 6.45254050
370 130250240260
130 240747378
5
160 5.14254050
370 130250240260
130 240747378
6
250 5.14254050
400 150255250270
150 250103103108
8
100
10-40 9.67
100
405065
50
380 145280280300
145 280757680
3
63 9.67405065
390 145280280300
145 2809697
1016
100 9.67405065
430 155300300320
155 300116117122
6
160 7.72405065
430 155300300320
155 300116117122
7
250 7.72405065
500 180320320340
180 320184185191
9
125
10-40 15.91
125
506580
50
440 165360360380
165 360116118122
4
63 15.91506580
460 165360360380
165 360158160165
7
100 15.91506580
500 170360360380
170 360192194200
9
160 11.96506580
500 170360360380
170 360195197203
10
250 11.96506580
570 190380380400
190 380265267274
12
SSV
PN H S
25
10-40 2.30
25
152
25
220 78180170 78 170
2020 2
63 2.301525 270 100
190190 100 190
3031 3
100 2.301525 270 100
190190 100 190
3031 3
160 2.121525 270 100
190190 100 190
3031 3.5
250 2.121525 300 115
195195 115 195
4142 4.5
32
10-40 2.30
32
1525
25
220 78180170 78 170
2020 2
63 2.301525 270 100
190190 100 190
3031 3
100 2.301525 270 100
190190 100 190
3031 3
160 2.121525 270 100
190190 100 190
3031 3.5
250 2.121525 300 115
195195 115 195
4141 4.5
40
10-40 2.30
40
152532
25
220 78180170180
78 170202022
2
63 2.30152532
270 100190190200
100 190303133
3
100 2.30152532
270 100190190200
100 190303133
3
160 2.12152532
270 100190190200
100 190303133
3.5
250 2.12152532
300 115195195205
115 195414244
4.5
50
10-40 2.86
50
152532
25
250 90190180190
90 180282830
2
63 2.86152532
280 105200200210
105 200363739
3
100 2.86152532
290 105200200210
105 200434446
3
160 2.65152532
290 105200200210
105 200434446
3.5
250 2.65152532
330 125205205215
125 205505153
4.5
SSV
3
SSV
18PN H S
150 2.30 220 78180170 78 170
1919 2
300 2.30 270 100180170 100 170
2727 3
600 2.30 270 100190190 100 190
2829 3
900 2.12 320 125200200 125 200
3637 3.5
1500 2.12 320 125200200 125 200
3940 4.5
150 2.30 220 78170170 78 170
1919 2
300 2.30 270 100180170 100 170
2727 3
600 2.30 270 100190190 100 190
2829 3
900 2.12 320 125200200 125 200
3637 3.5
1500 2.12 320 125200200 125 200
3940 4.5
150 2.30 220 78180170180
78 170191920
2
300 2.30 270 100180170180
100 170272728
3
600 2.30 270 100190190200
100 190282931
3
900 2.12 320 125200200210
125 200363739
3.5
1500 2.12 320 125200200210
125 200394042
4.5
150 2.86 250 90190180190
90 180282829
2
300 2.86 270 100190180190
100 180333334
3
600 2.86 290 105200200210
105 200394042
3
900 2.65 325 125210210220
125 210525355
3.5
1500 2.65 350 135210210220
135 210616264
4.5
SSV
SSV
18PN H S
150
10-40 23.13
150
6080
100
65
500 190390395415
190 390181184191
7
63 23.136080
100520 190
400405425
190 400231234241
10
100 23.136080
100580 190
420420440
190 420264266274
13
160 16.056080
100580 190
420420440
190 420291293301
15
250 16.056080
100630 220
420420440
220 420381383393
19
200
10-40 44.84
200
80100125
80
630 240480480500
240 480364366372
10
63 44.8480
100125
650 240485485505
240 485403405411
14
100 44.8480
100125
680 240510520540
240 510446451459
17
160 20.9680
100125
720 240520535555
240 520459464473
20
250 20.9680
100125
830 265590590610
265 590704707717
27
250
10-40 55.05
250
100125150
100
730 265560560580
265 560661664672
17
63 55.05100125150
760 265550550570
265 550699702710
22
100 55.05100125150
840 280590590610
280 590788791799
23
160 34.97100125150
880 280590590610
280 590814817826
29
250 34.97100125150
1050 340700700720
340 700123912431253
59
300
10-40 81.85
300
125150200
125
860 320640640660
320 640826829837
20
63 81.85125150200
900 320640640660
320 640884887895
28
100 81.85125150200
1050 330680680100
330 680111811231133
29
160 42.29125150200
1050 330680680700
330 680111811231133
38
250 42.29125150200
1200 380740740760
380 740205120562066
75
1) Weight of hand-operating branch
Other pipe sizes, pressure ranges and special designs are deliverable on request.
With reservation to changes of dimensions and weights.
SSV
3
SSV
18PN H S
150 23.13 500 190390395415
190 390179181187
7
300 23.13 520 190390395415
190 390227230236
10
600 23.13 580 190420420440
190 420275277284
13
900 16.05 600 200420420440
200 420337339346
15
1500 16.05 700 260420420440
260 420413416424
19
150 44.84 630 240480480500
240 480362364370
10
300 44.84 650 240480480500
240 480392394400
14
600 44.84 680 240510520540
240 510445450458
17
900 20.96 750 250520535555
250 520595601609
20
1500 20.96 880 295590590610
295 590730733741
27
150 55.05 730 265560560580
265 560648650656
17
300 55.05 750 270560560580
270 560692694700
22
600 55.05 840 280590590610
280 590800805813
23
900 34.67 900 290590590610
290 590922927935
29
1500 34.67 1100 370700700720
370 700145514611471
59
150 81.85 860 320635635655
320 635818820826
20
300 81.85 880 320640640660
320 640881883889
28
600 81.85 1050 330680680700
330 680110111061115
29
900 42.29 1050 330680680700
330 680129913041313
38
1500 42.29 1250 410740740760
410 740200520122024
75
1) Weight of hand-operating branch
Other pipe sizes, pressure ranges and special designs are deliverable on request.
With reservation to changes of dimensions and weights.
SSV
PN H S
150 3.87 280 105205205215
105 205434445
2
300 3.87 300 115205205215
115 205515253
3
600 3.87 340 125220225235
125 225626367
3
900 3.34 370 140230235245
140 235757780
3.5
1500 3.34 390 150240240250
150 240919397
4.5
150 6.45 310 120245230250
120 230484650
3
300 6.45 330 125245230250
125 230626064
5
600 6.45 370 130250240260
130 240818084
5
900 5.14 390 140250245265
140 245858589
6
1500 5.14 430 160255250270
160 250117117121
8
150 9.67 380 145280280300
145 280777882
3
300 9.67 390 145280280300
145 280102103107
6
600 9.67 430 155300300320
155 300126128133
6
900 7.72 450 165300310320
165 310152155159
7
1500 7.72 520 190320320340
190 320192196202
9
150 15.91 450 165360360380
165 360121123128
4
300 15.91 480 165370360380
165 370160161166
7
600 15.91 500 170360360380
170 360223225231
9
900 11.96 530 185370375395
185 370261264271
10
1500 11.96 630 230390390410
230 390344346353
12
SSV
3
SSV
20
SSV
SSV
20
SSV
PN H S
100
10-40 15.91
100
506580
50
410 160350350370
160 350108109113
5
63 15.91506580
420 160350350370
160 350129130134
6
100 15.91506580
460 170350350370
170 350136137141
6
160506580
460 170350350370
170 350136137141
6
250506580
125
10-40 23.13
125
6580
100
40
470 180380385405
180 380120122128
7
63 23.136580
100490 180
390395415
180 390197200207
8
1006580
100
1606580
100
2506580
100
150
10-40 46.79
150
80100125
80
520 190440440460
190 440187188195
7
63 46.7980
100125
550 200445445465
200 445240242249
10
100 46.7980
100125
620 210470480500
210 470276279287
13
160 46.7980
100125
620 210480495515
210 480338343352
15
25080
100125
200
10-40 33.33
200
100125150
100
650 240530530550
240 530390393402
10
63 33.33100125150
670 240520520540
240 520449451460
14
100100125150
720 260560560580
260 560517520532
20
160100125150
760 260560560580
260 560540543555
20
250100125150
PN H S
40
10-40 2.86
40
152532
25
220 78180170180
78 170202021
2
63 2.86152532
270 100190190200
100 190303132
3
100152535
160152535
250152535
50
10-40 3.87
50
254050
40
260 95205205215
95 205333538
2
63 3.87254050
300 120220225235
120 225434548
3
100 3.87254050
160254050
250254050
65
10-40 6.45
65
254050
40
290 110245230250
110 230514952
2
63 6.45254050
330 125245230250
125 230596164
3
100254050
160254050
250254050
80
10-40 9.67
80
405065
50
330 130280280300
130 280515256
5
63 9.67405065
100 9.67405065
400 150300300320
150 300939498
6
160 9.67405065
400 150300300320
150 300939498
6
250405065
3
SSV
20PN H S
150 2.86 220 78180170180
78 170191920
2
300 2.86 270 100180170180
100 170272728
3
600
900
1500
150 3.87 250 90205205215
90 250313234
2
300 3.87 280 105205205215
105 205383941
3
600 3.87 310 120220225235
120 225424447
3
900
1500
150 6.45 290 110245230250
110 230535154
2
300 6.45 310 120245230250
120 230585659
3
600
900
1500
150 9.67 330 130280280300
130 280505155
3
300 9.67 350 135280280300
135 280626367
5
600 9.67 390 140240240260
140 240858691
5
900 9.67 410 150300310320
150 310105106111
6
1500
SSV
SSV
20
SSV
PN H S
250
10-40 50.56
250
125150200
125
750 270620620640
270 620671673683
20
63 50.56125150200
750 270620620640
270 620712715726
23
100125150200
160125150200
250125150200
300
10-40
300
150200250
150
63150200250
100150200250
160150200250
250150200250
3
SSV
20
1) Weight of hand-operating branch
Other pipe sizes, pressure ranges and special designs are deliverable on request.
With reservation to changes of dimensions and weights.
SSV
PN H S
150 15.91 410 160350350370
160 350106107111
3
300 15.91 420 160360360380
160 360110111115
6
600 15.91 460 170360360380
170 360134135140
6
900
1500
150 23.13 480 180380385405
180 380127129134
4
300 23.13 500 180380385405
180 380166168173
7
600
900
1500
150 46.79 520 190440440460
190 440185186193
7
300 46.79 540 190440440460
190 440232233241
10
600 46.79 620 210470480500
210 470281284292
13
900 46.79 640 220490505525
220 490343348357
15
1500
150 33.33 650 240530530550
240 530387380389
10
300 33.33 690 280530530
260 530408410419
14
600
900
1500
SSV
PN H S
150 50.56 750 270620620640
270 620677680691
17
300 50.56 770 275620620
275 620726729740
22
600
900
1500
150
300
600
900
1500
4
SSSV 40-49
Special Compensating Bypass
Check Valve
SS
4
SSV
40-49
Lower body Part-No. 1
Upper body Part-No. 2
Cone complete Part-No. 3
Cone guide Part-No. 4
Cone guide Part-No. 5
Bypass-branch Part-No. 30
Adapter Part-No. 31
Lever Part-No. 32
Toothed segment Part-No. 33
Bearing pin Part-No. 34
Pin cover plate Part-No. 35
Carrier plate Part-No. 36
Control disc Part-No. 37
Bearing plate Part-No. 38
Throttle Part-No. 40
Stud bolt Part-No. 90.1
Eye bolt Part-No. 90.2
Socket screw Part-No. 91.1
Socket screw Part-No. 91.2
Cap nut Part-No. 92
Dowel pin Part-No. 94.1
Dowel pin Part-No. 94.2
Dowel pin Part-No. 94.3
Coil spring Part-No. 95.1
Control disc complete, consisting of:
Control disc Part-No. 37
Bearing plate Part-No. 38
Dowel pin Part-No. 94.3
Single Spare Parts
Coil spring Part-No. 95.1
SSV
The Compensating Bypass Check Valve type SSV
40 to 49 is a pump protection device. Based on the
SSV 10 to 20 series it was especially designed for
pressure load.
(with Type SSV 10 to 20 approx. 35% nominal pump
QBy can be gathered from table 1.
The SSV 40 to 49 valves normally are manufactured
in the sizes DN 50 to DN 600 (resp. NVS 2” to NVS
24”). Other sizes are deliverable on request. For de-
is limited to approx. 80 bar. Other operating limits
and application ranges are equal to the SSV 10 to
20 series.
The Compensating Bypass Check Valve with control
means the non-return cone (3) is kept in his operating
such a way, that the cone reaches its utmost upper
The non-return cone (3) activates the control disc (37)
in the bypass by means of the lever (32). If the cone
is positioned on the cone seat, the control disc (37) is
completely open. It closes corresponding to the rising
of the cone by delivery in main direction. The valve
necessary for supplement of the required minimum
other hand the bypass opens again, when the main
SSV
DIN ANSI
Typ DN DN
SSV 40 50-80 25-40 10.50 12.29
SSV 41 80-125 40-50 21.00 24.57
SSV 42 100-150 65-80 42.00 49.14
SSV 43 150-250 100-125 80.00 93.60
SSV 44 200-400 125-150 120.00 140.40
SSV 45 250-400 125-150 172.00 201.24
SSV 46 300-500 150-250 240.00 280.80
SSV 47 350-600 200-300 350.00 409.50
SSV 48 350-600 250-350 502.00 587.34
SSV 49 400-600 350-400 780.00 912.60
5
SSSV 70-79
Special Compensating Bypass
Check Valve
SS
5
SSV
70-79
Lower body Part-No. 1
Upper body Part-No. 2
Cone complete Part-No. 3
Cone guide Part-No. 4
Cone guide Part-No. 5
Bypass-branch Part-No. 30
Adapter Part-No. 31
Lever Part-No. 32
Toothed segment Part-No. 33
Bearing pin Part-No. 34
Pin cover plate Part-No. 35
Carrier plate Part-No. 36
Control disc Part-No. 37
Bearing plate Part-No. 38
Throttle Part-No. 40
Socket screw Part-No. 90.1
Eye bolt Part-No. 90.2
Socket screw Part-No. 91.1
Socket screw Part-No. 91.2
Cap nut Part-No. 92
Dowel pin Part-No. 94.1
Dowel pin Part-No. 94.2
Dowel pin Part-No. 94.3
Coil spring Part-No. 95.1
Control disc complete, consisting of:
Control disc Part-No. 37
Bearing plate Part-No. 38
Dowel pin Part-No. 94.3
Throttle Part-No. 16
Non-return valve Part-No. 17
Single Spare Parts
Coil spring Part-No. 95.1
Coil spring Part-No. 95.3
SSV
The Compensating Bypass Check Valve type SSV
70 to 79 is a pump protection device. In addition to
the SSV 40-49 series the SSV 70-79 series uses a
non-return valve in the bypass. Based on the SSV
10 to 20 series it was especially designed for centri-
can be delivered through the bypass as minimum
values QBy
can be gathered from table 1.
The SSV 70 to 79 valves normally are manufactured
in the sizes DN 50 to DN 600 (resp. NVS 2” to NVS
24”). Other sizes are deliverable on request. For
design reasons the pressure loss DpBy
at the
bypass is limited to approx. 80 bar. Other operating
limits and application ranges are equal to the SSV
10 to 20 series.
The Compensating Bypass Check Valve with control
means the non-return cone (3) is kept in his operating
such a way, that the cone reaches its utmost upper
The non-return cone (3) activates the control disc (37)
in the bypass by means of the lever (32). If the cone
is positioned on the cone seat, the control disc (37)
is completely open. It closes corresponding to the
rising of the cone by delivery in main direction. The
necessary for supplement of the required minimum
other hand the bypass opens again, when the main
SSV
DIN ANSI
Typ DN DN
SSV 70 50-80 25-40 8,00 9.36
SSV 71 80-125 40-50 17,40 20.36
SSV 72 100-150 65-80 32,30 37.67
SSV 73 150-250 100-125 60,60 70.90
SSV 74 200-400 125-150 90,00 105.30
SSV 75 250-400 125-150 129,00 150.93
SSV 76 300-500 150-250 180,00 210.60
SSV 77 350-600 200-300 262,50 307.13
SSV 78 350-600 250-350 376,50 440.51
SSV 79 400-600 350-400 585,00 684.45
6
SMVMultifunction Valve
6
device opens because of the dropping differential
pressure, so that developed gas, e.g. by after-heat
in the pump system, will be passed off immediately
the next start or automatic re-start.
The Multifunction Valve SMV is a product innovation,
created with the purpose of eliminating problems,
known from day-to-day practice. This valve improves
plant security and availability through combining
vital functions at competitive prices. The combined
pump protection is achieved by assuring the
in the main delivery stream with the Automatic-
The main application area is in the process enginee-
-
perature engineering, fuel depot engineering, and
Valve can be used in all pump plants delivering
gaseous media and for pumps which are – because
of modern sealing systems or similar devices –
equipped with gas-injections.
Also, the Multifunction Valve SMV will protect split
cage motor pumps (non-seal pumps) and magnetic
pumps from dry operation.
The design is according to standard AD 2000 and
particulary to EN 13445. As required by Pressure
Equipment Directive (PED) 97/23/EG the products
are supplied with CE Marking and Declaration of
Conformity.
category 1 to 4 are covered. Otherwise installation,
mode of operation and construction are as for Type
SSV 10-20.
SMV
SMV
10-12
18/20
SMV
Observations and case studies from practical applica-
tions prove the need for the Schroeder Multifunction
Valve.
Operation breakdowns, damages and other pro-
blems, caused by dry pump operation have often
stations of fuel depots. These problems mostly
occured during times of start-up and re-starts of
pumps.
-
-
ture increase in the stopped pump. This gas volume
or totally with gas. This can be caused by the tem-
after-heat of the pump immediately after disconnec-
tion. Depending on the pump type it will become
impellers cannot build up delivery pressure when
the pump is re-started. Thus the pump operates
dry and seconds later considerable damages occur,
possibly leading to destruction of the pump and
environment.
Schroeder Multifunction Valve provides a continuous
The Schroeder Multifunction Valve SMV is installed
near the pressure connection. Due to the elevated
position a geodetical high reference point is formed
below the non-return cone on the pump pressure side
in main stream direction. During the dwell period of the
machine, the resulting gas is collected in the region of
of the Multifunction Valve is automatically kept in open
position, when the pump is not working. Thus a con-
the machinery is constantly kept in a cold state and
is prepared for a secure start or re-start. Immediately
after start-up the pump produces the required diffe
6
SMV
18/20
Lower body Part-No. 1
Upper body Part-No. 2
Cone Part-No. 3
Cone guide Part-No. 4
Cone guide Part-No. 5
Bypass branch Part-No. 10
Casing Part-No. 12
Rotary slide valve Part-No. 13
Operating lever Part-No. 14
Throttle Part-No. 16
Non-Return Valve Part-No. 17
Degassing branch Part-No. 26
Degassing valve Part-No. 27
Bypass Valve Head, complete Part-No. 60
O-Ring Part-No. 78.1
O-Ring Part-No. 78.2
O-Ring Part-No. 78.3
O-Ring Part-No. 78.4
O-Ring Part-No. 78.5
Socket screw Part-No. 91.1
Socket screw Part-No. 91.2
Dowel pin Part-No. 94.1
Dowel pin Part-No. 94.2
Coil spring Part-No. 95.1
Coil spring Part-No. 95.3
Coil spring Part-No. 95.4
Bypass Valve Head, complete Part-No. 60 consiting of:
Casing Part-No. 12
Rotary slide valve Part-No. 13
Operating lever Part-No. 14
Dowel pin Part-No. 94.1
Dowel pin Part-No. 94.2
Non-Return Valve in the Bypass Branch, complete, consisting of:
Throttle Part-No. 16
Non-Return Valve Part-No. 17
O-Ring Part-No. 78.2
O-Ring Part-No. 78.4
Coil spring Part-No. 95.3
Single Spare Parts
O-Ring Part-No. 78.1
O-Ring Part-No. 78.2
O-Ring Part-No. 78.3
O-Ring Part-No. 78.4
O-Ring Part-No. 78.5
Coil spring Part-No. 95.1
(95.2)
Coil spring Part-No. 95.3
Coil spring Part-No. 95.4
For main dimensions H, S and L see type SSV 18,
H1 and S
1 on request.
SMV
Lower body Part-No. 1
Upper body Part-No. 2
Cone Part-No. 3
Cone guide Part-No. 4
Cone guide Part-No. 5
Bypass branch Part-No. 10
Casing Part-No. 12
Rotary slide valve Part-No. 13
Operating lever Part-No. 14
Throttle Part-No. 15
Degassing branch Part-No. 26
Degassing valve Part-No. 27
Bypass Valve Head, complete Part-No. 60
O-Ring Part-No. 78.1
O-Ring Part-No. 78.2
O-Ring Part-No. 78.3
O-Ring Part-No. 78.4
O-Ring Part-No. 78.5
Socket screw Part-No. 91.1
Socket screw Part-No. 91.2
Dowel pin Part-No. 94.1
Dowel pin Part-No. 94.2
Coil spring Part-No. 95.1
Coil spring Part-No. 95.4
Bypass Valve Head, complete, Part-No. 60 consisting of:
Casing Part-No. 12
Rotary slide valve Part-No. 13
Operating lever Part-No. 14
Dowel pin Part-No. 94.1
Dowel pin Part-No. 94.2
Throttle in the Bypass Branch, consisting of:
Throttle Part-No. 15
O-Ring Part-No. 78.4
Single Spare Parts
O-Ring Part-No. 78.1
O-Ring Part-No. 78.2
O-Ring Part-No. 78.3
O-Ring Part-No. 78.4
O-Ring Part-No. 78.5
Coil spring Part-No. 95.1
(95.2)
Coil spring Part-No. 95.3
Coil spring Part-No. 95.4
For main dimensions H, S and L see type SSV 18,
H1 and S
1 on request.
SMV
7
SSMAAutomatic Minimum Flow System
7
SMA
63/64
upwards and stops at another predetermined position.
During this procedure the cone actuates both control
valves of the pilot unit via the lever (32) and the control
plunger (31).
After control valve 2 closes, control valve 1 opens. For
the medium the passage to the piston (15) in the
by-pass becomes free. The piston forces forward
closes. (Position „OFF“).
100%.
-
wards and switches the two control valves, as soon
bypass opens (Position „ON“) and the pump minimum
prevents a too fast closing of the bypass and con-
sequently a hammering valve piston (15).
Through the clear positions of the bypass („ON“ resp.
protection has been developed, which combines
a very low wear and tear with very high operational
security at highest pressure loads.
The Autonomous Minimum Flow Systems comprise a
split body with non-return cone, bypass and the pilot
unit.
In the standard option the casing for valve and bypass
are of forged steel 1.0460. Cone seat and actuator
control surfaces are stellite-faced. The other parts are
made of suitable stainless steels.
By is passed off via the Bypass.
A piston (15) takes over the closing and opening of
the bypass. Double sealing of the piston in the ring
seat (14) achieves extreme durability of the internal
bypass parts. The following pressure reduction of the
in the bypass.
The pilot unit utilizes the medium and the pump pres-
sure for actuation of the piston (15). Two control valves
control the pump pressure in front of resp. behind the
piston and consequently the position of the piston ON
resp. OFF is regulated. The control valves are actuated
-
(37) a cushioned move of the piston (15) is achieved.
With a pressure indicator on the bypass the function of
the Minimum Flow System can be supervised.
SMASMA
The Automatic Minimum Flow System SMA 63/64
is a protection device for pump protection. It auto-
matically protects centrifugal pumps from damages,
which might occur during operation under low load
conditions because of partial evaporation of the
a predetermined value, the valve opens its bypass,
DIN ANSI
Q Q
803240
180 50 45 13
1004050
280 78 70 19
1255065
440 12270
12019
133
1506580
630 175120180
3350
20080
1001120 311
180280
5078
250100125
1750 486280440
78122
Through actuation of the bypass via a valve control
plunger (15) the bypass can be opened resp. closed
completely. This On-Off-Regulation of the Bypass
makes it possible to increase the load limit from
200 bar to 400 bar. The prefered duty is in the ran-
ge of nominal pressure 250 to 400 bar resp. ANSI
2500 lbs.
power.
7Notes
SMA
63/64
As a special design SMA 64 the system can also be
utilized for speed controlled pumps.
Special attention has been paid to easy main-
tenance. So it is not necessary to dismantle the
of the wearing parts like piston and ring seat.
The hand-operating branch with multi-port throttle
a manually actuated valve combination. We recom-
mend the branch for sparing of the internal bypass
parts at frequent operation in the range of minimum
Two positions are possible:
• D1 in the lower part of the casing with junction
below the cone;
· the bypass remains open
• D2 in the upper part of the casing with junction
above the cone (larger valve length);
-
ge branch etc. can be provided, if so desired. Flange
design acc. to DIN, ANSI, BS, ISO and related stan-
dards are possible.
We recommend installation directly on the pump
installation is from bottom to top, when installed ver-
tically.
In order to avoid vibrations in the valve and the pipe
lines we recommend to continue the connecting
line at the outlet (DN2) and the bypass branch
(DN3) for approx. 2-3 m in the chosen nominal bore.
A pipe bend directly to the bypass branch should be
avoided.
AD 2000 and particularly to EN 13445. As per Pres-
sure Equipment Directive 97/23 EG the products are
provided with the CE marking and the Declaration
H1 (Pressure Equipment Directive 97/23 EG) all
dangerous material classes of category 1 to 4 are
covered.
SMA
7SMA
SMA
63
7SMA
SMA
64
8
SR/SAHigh Pressure Control
Valve
8
SR/SAASME or welding ends in a standard range of DN
25 - DN 150 / NPS 1“ – NPS 6“. Other nominal sizes
are possible on request.
The following valve characteristics are available:
linear, square, equal percentage and on/off.
Valves can be equipped with all common types of
actuators (electrically, pneumatically, hydraulically
actuated). Valves with on-/off-regulation can also be
delivered self actuated, i.e. without external power
Depending on the medium, the valve body is made
of ferritic, austenitic or austenitic-ferritic (duplex)
steel.
particularly to EN 13445. As per Pressure Equipment
Directive 97/23 EG the valves are provided with
the CE marking and the Declaration of Conformity.
Equipment Directive 97/23 EG) all dangerous
material classes of category 1 to 4 are covered.
Max. Design: 600 bar/400 °C
Pressure drop:
Nominal sizes:DN 25 - DN 150(> other sizes on request)
Connection end:
Characteristics: on/off, linear, square, equal-%
Actuators:electric, pneumatic, hydraulic self operated
Body style: Angle- or Z-type
Body materials:
carbon steelDIN EN 10222-2stainless steelDIN EN 10222-5duplex steelDIN EN 10222-5
Inner Parts: chrome steel
Gaskets:· Body· Inner gaskets
metal to metal ceiling
PTFE-pressure sleeveT > 160 ° Graphit
SR/SASR/SA
The SR/SA-type is a High-Pressure control valve for
liquids. It is designed for simple on-/off-regulation
(SR-type). Mainly it‘s utilised for the following
applications:
• feed water control
• injection systems
• process control
In case of pump protection the SR/SA-type is highly
associated with modern process control and monito-
adjusted to customers resp. plant requirements.
With the check back signal of the positioner (or other
available sensors) the valve can be usefully integrated
in every process control/monitoring system. In that
way the SR/SA-valve enlarges the Schroeder portfolio
to control valves and allows pump users to lower their
energy and maintenance costs.
Referring to the increasing pressure/temperature
neering the valves are designed for pressures up
to pA = 600 bar / 8700 psi and temperatures of
TA = 400 °C / 750 °F. With up to 10 controlled throt-
8700 psi can be handled troublefree.
9
SSDMulti-Port Throttle
9
SSD
SSD
The Multi-Port Throttles are used to reduce the
Multi-Port Throttles are available for sizes from DN
20 up to DN 500 and pressure ratings up to PN 640
and ANSI 2500 and for medium temperature up to
300 °C.
The standard material for casing is 1.0460 (P250GH
similar to ASTM A105) and for the throttles 1.4581.
On request casings can be supplied of different
high-grade steel qualities. The design is according
to standard AD 2000 and particularly to EN 13445.
As required by Pressure Equipment Directive
(PED) 97/23/EG the products are supplied with CE
module H1 all dangerous classes of category 1 to 4
are covered.
The pictures above show the available versions of
our Multi-Port Throttles. If you have any questions
do not hesitate to contact us – it is our pleasure to
help you solving your technical problem.
Notes
10
SDVBack Pressure Device
bar
SDVBack Pressure Device
SDV
Range of application
The SDV is a back pressure device, which keeps
the static pressure within the pipeline above a
minimum value without reference to
rate. That means, the pressure will not fall below the
given minimum value over the whole operating range.
Normally back pressure devices are used to avoid
cavitation and partial evaporation in the pipeline.
Due to the increased pressure level in the protected
plant section they prevent a lower deviation from the
local vapor pressure. The SDV has an integrated
non return-valve function, i.e. the piping is also
w.
Mode of operation
The function of the SDV is based on a spring loaded
cone. Cone and spring are adjusted in a way,
that the force of the static pressure lifts the cone
of the seat and does not allow a rate before
reaching the minimum pressure value. Compared
with other pressure devices the Schroeder SDV has a
ehtfoaeragnilttorhtehttahtos,mirtgnitaluger
cone seat is attuned to the current w. With this
design feature the tendency of spring loaded shut-off
cones to hammer at low rate is minimized. So
the SDV is suitable for plants with large range
and frequent part load condition, too.
Technical data
The Schroeder pressure device is manufactured in
the nominal sizes DN 25 – DN 200 / NPS 1“ – NPS 8“,
for pressure ratings up to PN 400 / ANSI 2500 and
a max. operating temperature of 400 °C / 750 °F.
Higher pressure ratings are possible on request. The
body is normally made of 1.0460 / ASTM
SA105. Referring to medium, several alloyed steels
are also deliverable. The regulating trim is made of
Cr-steel or aluminium-bronze.
Design
The design is according to AD 2000 and
particularly to EN 13445. As per Pressure Equipment
Directive 97/23 EG the SDV is provided with the CE
marking and the Declaration of Conformity.
according to the Module H1 (Pressure Equipment
Directive 97/23 EG) all dangerous material
classes of category 1 to 4 are covered.
SDV – Schroeder Back Pressure Device
look at info
overview
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E-mail : [email protected]
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Fax : 031-579 2562
E-mail : [email protected]
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R