Construction
The safety valve comprises:
•Housing
• Spring bonnet
• Valve cone
•Spring
Materials
• Brass housing
• Bonnet of brass (sizes
• Bonnet of cast iron (sizes 1
• Valve cone of brass
• Spring of stainless steel or spring steel
• Disc seal of Viton
1
/2" to 1")
1
/4" to 2"), powder coated
S245B
Safety Valve
High performance valve for compressed air
Product specification sheet
Application
Safety valves of this type are direct loaded high performance
safety valves with lifting device. They protect pressurized
compressed air vessels (cylinders, tanks) against excessive pressure.
Safety valves of this type are used for compressors and other
industrial purposes.
Special Features
• Sturdy metal construction
• Shakeproof lifting mechanism admitting no additional load
• Approved by VdTÜV for pressure range from 0.5 - 30.0 bar
• Approved by ASME (American Society of Mechanical Engineers) for pressure range 2.8 - 30.0 bar (41 - 435 PSI)
• Certified to Pressure Equipment Directive 97/23/EC, Reference No. CE 0035
• Set pressure adjustment at factory
• Set pressure settings possible between 0.5 and 30 bar in
steps of 0.1 bar
• Light weight
Range of Application
Compressed air.
Non-toxic, non-corrosive and non inflammable gases which may
be discharged to atmosphere.
Not suitable for oxygen and steam.
Technical Data
Max. operating
temperature
Approval No. TÜV · SV · ..* - 340 D
ASME approval reference 30.492
Discharge rate TÜV αw = 0.73
Connection size G
..* valid Approval No.
180 °C ASME
260 °C TÜV / CE
P = set pressure
D
= nozzle diameter
0
ASME Kd = 0.863
1
/2" - G 2"
D/G 0.73 · p
0
EN0H-1309GE23 R0807 • Subject to change
www.honeywell.com 35
S245B Safety Valve
Connection size R1/2"3/4"1"1 1/4"1 1/2"2"
Weight (kg) 0.4 0.6 0.9 1.7 3.0 8.0
40
32
25
20
15
D
SW
10
h
0
H
12
138
27
15
153
36
16
185
41
18
231
50
20
293
60
22
367
80
Dimensions (mm)
Method of Operation
Safety valves are direct-acting. The disc seal is pushed up by the
pressure from the system against a spring which is holding the
valve closed. If the opening force exceeds the force exerted by
the spring, the valve disc is lifted off the valve seat and the valve
discharges the medium. In accordance with the requirements of
the standard, the full discharge capacity of the valve will be
achieved when the system pressure climbs to no more than 10%
above the set pressure of the valve. Full shutoff must be achieved
if the system pressure falls to below 90% of the nominal set pressure value.
Options
S245B- ... ZA*...= Safety valve, set pressure 1.0 -12.0 bar
S245B- ... ZB*...=Safety valve,
set pressure < 1.0 or > 12.0 bar
Connection size
Set pressure
Ordering Example
S245B-3/4ZA* 5.8 = Safety valve (soft seat version), size
3
/4", set
pressure 5.8 bar
S245B-1ZB* 0.8 = Safety valve (soft seat version), size 1", set
pressure 0.8 bar
Corrective-Factor
36 www.honeywell.com
EN0H-1309GE23 R0807 • Subject to change
Installation Example
S245B Safety Valve
Installation Guidelines
• Safety valves for compressed air fit in a vertical upwards
pointing pipework or on top of a pressurized compressed air
vessel.
• Connections through all pipe, fittings and nonreclosing pressure relief devices (if installed) between a pressure vessel and
its safety valve shall have at least the area of the safety valve
inlet.
• The characteristics of the upstream system shall be such that
the pressure drop will not reduce the relieving capacity below
that required or adversely affect the proper operation of the
safety valve.
• The opening in the vessel wall shall be designed to provide
unobstructed flow between the vessel and its safety valve.
• There shall be no intervening stop valves between the vessel
and its safety valves.
Inspection
A set pressure function test should be carried out at least once
per year. The detailed test procedure is determined by the user.
Discharge capacity for compressed air (TÜV) Type S245B
Typical Applications
Safety valves are fitted where there is a risk of excess or extreme
pressures which may injure people or damage equipment.
The following are some typical applications:
• Air supplies to a factory
• Portable compressor units
• Paint spray units
• Pressure tanks
EN0H-1309GE23 R0807 • Subject to change
www.honeywell.com 37
S245B Safety Valve
[Approval reference TÜV · SV · 05 · 340 · D0 · D/G · aw · p]
Opening pressure
bar psi
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5
7
7.5
8
8.5
9
9.5
10
10.5
11
11.5
12
12.5
13
13.5
14
14.5
15
Discharge capacity for compressed air (ASME) Type S245B [Approval reference ASME 30,492]
Opening pressure
bar psi
2.8
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.5
8.0
8.5
9.0
9.5
10.0
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
14.5
15.0
15.5
16.0
Automation and Control Solutions
Honeywell GmbH
Hardhofweg
D-74821 Mosbach
Phone: (49) 6261 810
Fax: (49) 6261 81309
http://europe.hbc.honeywell.com
www.honeywell.com
Amount of air in Nm3/h (0 °C, 1.013 bar)
7
15
22
29
36
44
51
58
65
73
80
87
94
102
109
116
123
131
138
145
152
160
167
174
181
189
196
203
210
218
1
104
126
147
169
190
212
233
255
276
298
319
341
362
384
405
427
448
470
492
513
535
556
578
599
621
642
664
685
/2"
61
83
3
/4"1"1 1/4"1 1/2"2
138
186
234
283
331
380
428
477
525
573
622
670
719
767
815
864
912
961
1009
1058
1106
1154
1203
1251
1300
1348
1396
1445
1493
1542
245
331
417
503
589
675
761
847
933
1019
1105
1191
1277
1364
1450
1536
1622
1708
1794
1880
1966
2052
2138
2224
2310
2396
2483
2569
2655
2741
382
517
651
786
920
1055
1189
1324
1458
1593
1727
1862
1996
2131
2265
2400
2534
2669
2803
2938
3072
3206
3341
3475
3610
3744
3879
4013
4148
4282
Discharge capacity in SCFM* (60 °F, 14.5 PSI)
41
44
51
58
65
73
80
87
94
102
109
116
123
131
138
145
152
160
167
174
181
189
196
203
210
218
225
232
1
115
121
136
152
167
182
198
213
229
244
260
275
291
306
321
337
352
368
383
399
414
429
445
460
476
491
507
522
/2"
3
/4"1"1 1/4"1 1/2"2
258
272
306
341
376
411
445
480
515
549
584
616
654
688
723
758
793
827
862
897
932
966
1001
1036
1071
1105
1140
1175
458
483
545
606
668
730
792
853
915
977
1039
1100
1162
1224
1286
1347
1409
1471
1533
1594
1656
1718
1780
1841
1903
1965
2027
2089
716
754
851
947
1044
1140
1237
1333
1430
1526
1623
1719
1816
1912
2009
2105
2202
2298
2395
2491
2588
2684
2781
2877
2974
3070
3167
3263
Manufactured for and on behalf of the
Environmental and Combustion Controls Division
of Honeywell Technologies Sàrl, Ecublens, Route
du Bois 37, Switzerland by its Authorised Representative Honeywell GmbH
EN0H-1309GE23 R0807
Subject to change without notice
© 2007 Honeywell GmbH
626
847
1067
1287
1508
1728
1948
2169
2389
2609
2830
3050
3270
3491
3711
3931
4152
4372
4592
4813
5033
5254
5474
5694
5915
6135
6355
6576
6796
7016
1173
1236
1394
1552
1710
1868
2027
2185
2343
2501
2659
2817
2975
3133
3291
3449
3608
3766
3924
4082
4240
4398
4556
4714
4872
5030
5188
5347
978
1323
1667
2011
2356
2700
3044
3388
3733
4077
4421
4766
5110
5454
4799
6143
6487
6831
7176
7520
7864
8209
8553
8897
9241
9586
9930
10274
10619
10963
1832
1931
2178
2425
2672
2919
3166
3413
3661
3908
4155
4402
4649
4896
5143
5390
5637
5884
6131
6378
6625
6872
7119
7366
7613
7860
8107
8354
Opening pressure
bar psi
15.5
16
16.5
17
17.5
18
18.5
19
19.5
20
20.5
21
21.5
22
22.5
23
23.5
24
24.5
25
25.5
26
26.5
27
27.5
28
28.5
29
29.5
30
Opening pres-
Amount of air in Nm3/h (0 °C, 1.013 bar)
225
232
239
247
254
261
286
276
283
290
297
305
312
319
326
334
341
348
355
363
37
377
384
392
399
406
413
421
428
435
1
707
728
750
771
793
814
836
857
879
900
922
943
965
986
1008
1029
1051
1073
1094
1116
1137
1159
1180
1202
1223
1245
1266
1288
1309
1331
/2"
3
/4"1"1 1/4"1 1/2"2
1590
1638
1687
1735
1784
1832
1881
1929
1977
2026
2074
2123
2171
2219
2268
2316
2365
2413
2462
2510
2558
2607
2655
2704
2752
2800
2849
2897
2946
2994
Abzuf. Volumenstrom in SCFM* (60 °F, 14.5 PSI)
sure
bar psi
16.5
17.5
18.5
19.5
20.5
21.5
22.5
23.5
24.5
25.5
26.5
27.5
28.5
29.5
Certified coefficient of discharge (TÜV)αw = 0.73
Certified coefficient of discharge (ASME)Kd = 0.863 SCFM = standard cubic feet minute
17
18
19
20
21
22
23
24
25
26
27
28
29
30
239
247
254
261
268
276
283
290
297
305
312
319
326
334
341
348
355
363
370
377
384
392
399
406
413
421
428
435
1
538
553
568
584
599
615
630
646
661
677
692
707
723
738
754
769
785
800
815
831
846
862
877
893
908
924
939
954
/2"
3
/4"1"1 1/4"1 1/2"2
1210
1244
1279
1314
1348
1383
1418
1453
1487
1522
1557
1592
1626
1661
1696
1731
1765
1800
1835
1870
1904
1939
1974
2009
2043
2078
2113
2147
2827
2913
2999
3085
3171
3257
3343
3429
3515
3601
3688
3774
3860
3946
4032
4118
1204
4290
4376
4462
4548
4634
4720
4807
4893
4979
5065
5151
4237
5323
2150
2212
2274
2336
2397
2459
2521
2583
2644
2706
2768
2830
2891
2953
3015
3077
3138
3200
3262
3324
3385
3447
3509
3571
3632
3694
3756
3818
4417
4551
4686
4820
4955
5089
5224
5358
5493
5627
5762
5896
6031
6165
6300
6434
6569
6703
6838
6972
7107
7241
7376
7510
7645
7779
7914
8048
8183
8317
3360
3456
3553
3649
3746
3842
3939
4035
4132
4228
4325
4421
4518
4614
4711
4807
4904
5000
5097
5193
5290
5386
5483
5579
5676
5772
5869
5965
7237
7457
7677
7898
8118
8338
8559
8779
8999
9220
9440
9660
9881
10101
10322
10542
10762
10983
11203
11423
11644
11864
12084
12305
12525
12745
12966
13186
13406
13627
5505
5663
5821
5979
6137
6295
6453
6611
6769
6928
7086
7244
7402
7560
7718
7876
8034
8192
8350
8509
8667
8825
8983
9141
9299
9457
9615
9773
11307
11652
11996
12340
12684
13029
13373
13717
14062
14406
14750
15094
15439
15783
16127
16472
16816
17160
17505
17849
18193
18537
18882
19226
19570
19915
20259
20603
20947
21292
8601
8848
9095
9342
9589
9836
10083
10330
10577
10824
11071
11318
11565
11812
12059
12306
12554
12801
13048
13295
13542
13789
14036
14283
14530
14777
15024
15271
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