Our Low Flow Safety Relief Valve

For the pressure relief of tank cars

AAR Approved

All of our Low Flow Safety Relief Valve products are AAR approved.

Categories

  • Pressure Car Tank Car Parts

  • Pressure Relief Devices

Pressure Setting

  • 75 PSIG

Flow Information

  • Flow Capacity

    • See Model Numbers Table

Materials

  • Carbon Steel

  • 316 Stainless Steel

Flange Connection

Flat faced or tongue connection

Bolt Circle/Holes

  • Bolt Hole 

    • 3/4”

    • 7/8”

  • Bolt Circle

    • 6 1/4”

    • 8”

Common Model Number Variations

Model Number
Part Number
SRV-I330I-SSSS-F3
515528
SRV-I330I-SSSS-F1
515328
SRV-I330I-CSSS-F4
515531
SRV-I330I-CSSS-F3
515529
SRV-I330I-CSSS-F1
514256
SRV-I300H-SSSS-F4
515524
SRV-I300H-SSSS-F3
515522
SRV-I300H-SSSS-F1
515520
SRV-I300H-CSSS-F4
515525
SRV-I300H-CSSS-F3
515523

Replacement Parts

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Part Number
DESCRIPTION
Quantity
See Repair Kit
O-Ring #2-012
1
See Repair Kit
O-Ring #2-215
1
See Repair Kit
O-Ring #2-323
1
503166-04
Flange S/A, 7/8 Holes, 6-1/4 B.C., Flat Face, Carbon Steel
1
503166-03
Flange S/A, 7/8 Holes, 6-1/4 B.C., Flat Face, SST
1
305-8425
Seal Wire & Disc
1
304-8745
Drive Screw
2
304-8639
Locknut, 5/8 ESNA
1
304-7091
Hvy. Hex Nut, 5/8-11 UNC-2B
1
015966-01
Spring Follower, Carbon Steel
1
304-7055
Hvy. Hex Nut, 1/2-13 UNC-2B, SST
2
304-7030
Hvy. Hex Nut, 1/2-13 UNC-2B, Carbon Steel
2

Model Numbers

Model Spring Location Set Pressure (PSIG) Flow Rate (SCFM) Body Material Spring Material & Coating/Plating* Mounting Flange O-Ring Elastomer Material
SRV I: Internal 075: 75 A: 1,202 CS: Carbon Steel CS: Carbon Steel, Uncoated F1: (4) 7/8 Holes on 6.25 BC w/ Flat Face See Elastomer Table
075: 75 B: 1,212 SS: 316 Stainless Steel SS: Stainless Steel, Uncoated F2: (4) 3/4 Holes on 6.25 BC w/ Flat Face (75 PSIG ONLY)
165: 165 D: 2,381 F3: (4) 7/8 Holes on 6.25 BC w/ 4.005 x 4.745 DIA Small Tongue
225: 225 E: 3,232 F4: (4) 15/16 Holes on 8.00 BC w/ 6.005 x 6.745 DIA Large Tongue
247: 247 F: 3,497
280.5: 280.5 G: 3,925
300: 300 H: 4,207
330: 330 I: 4,614

Elastomer Table

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Line
PART NO. (SMALL O-RING)
LinePART NO. (LARGE O-RING)
Material
Abb.
1
208-7321
208-7326
VITON A
VA
2
208-7322
208-7327
FOOD GRADE NEOPRENE
NEW
3
208-7324
208-7329
BUNA-N
-BN
4
208-7323
208-7328
EPDM - PEROXIDE CURED
-EP
5
308-7333
308-7334
NEOPRENE BLACK
-NE
6
208-19989
208-19990
VITON GFLT
VGFLT
7
208-16005
208-16009
CAROLINA SEAL 4273B
CS4273B
8
208-16006
208-16010
CAROLINA SEAL 5355<
CS5355
9
208-16007
208-16011
VITON GF-S
VGFS
10
208-16008
208-16012
VITON EXTREME ETP
VETP
11
208-19992
208-19993
VITON B
VB
12
308-9857
308-7318
CHEMRAZ 505
CZ505
13
208-7301
208-7302<
KALREZ 6375
-KZ6375
14
208-16051
208-16050
DUPONT CERTIFIED VITON B
-VB-C
15
208-16055
208-16056
WHITE FOOD GRADE BUNA-N
-BNWFG
16
208-9672
208-9673
BUTYL RUBBER
-BU
17
208-16028
VITON F208-16029
VITON F
VF
18
208-16031
208-16032
CAROLINA SEAL 4273
-CS4273<
19
208-16037
208-16038
CAROLINA SEAL EP787
CSEP787
20
208-16039
208-16040
PAI 9703
9703
21
208-16041
208-16042
CAROLINA SEAL 5350
-CS5350
22
108-20135
108-20136
SIMRIZ 7295
-SZ7295
23
108-20156
108-20157
WHITE FOOD GRADE EPDM
-EPWFG
24
208-0776
208-0777
CAROLINA SEAL 4560
-CS4560
25
208-29422
208-29423
VSP0-10E40-VITON A (FDA)
-VSPE40
26
208-29434
208-29435
VSPO-10E21-KALREZ 6375
VSPE21
27
208-29436
208-29437
VSPO-10E41-CHEMRAZ 505
-VSPE41
28
208-29438
208-29439
VSPO-10E22-VITON GFS
-VSPE22
29
208-29440
208-29441
VSPO-10E10-VITON B
-VSPE10
30
208-29442
208-29443
VSPO-10E01-BUNA-N
-VSPE01
31
208-29444
208-29445
VSPO-10E03-EPDMF PC
-VSPE03
32
208-29446
208-29447
VSPO-10E11-NEOPRENE
-VSPE11
33
208-29448
208-29449
VSPO-10E17-WHITE NITRILE
-VSPE17
34
208-29450
208-29451
VSPO-10E16-NEOPRENE, WHITE (FDA)
-VSPE16
35
208-29452
208-29453
VSP0-10E25-VITON GFLT
-VSPE25
36
208-29454
208-29455
VSPO-10E28-WHITE EPDM
-VSPE28