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
SRV-I300H-CSSS-F1
515521

Replacement Parts

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Part Number
DESCRIPTION
Quantity
101214-01
Stud, 1/2-13 UNC-2A, Carbon Steel
2
101152-01
Cap, SST
1
101151-01
Stem
1
101148-01
Cap, Carbon Steel
1
026386-04
Spring, Carbon Steel
1
026049-01
Spring Follower, SST
1
026044-01
Spring, SST
1
026041-01
Guide Top, SST
1
024178-03
Hvy. Hex Nut, 5/8-11 UNC-2B, w/Holes
1
017387-46
ID Plate, SST Valve
1
017387-45
ID Plate, Carbon Steel Valve
1
See Repair Kit
O-Ring, 2-347
1

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

Line PART NO. (SMALL O-RING) PART 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
16 208-16055 208-16056 WHITE FOOD GRADE BUNA-N -BNWFG
17 208-9672 208-9673 BUTYL RUBBER -BU
18 208-16028 208-16029 VITON F -VF
19 208-16031 208-16032 CAROLINA SEAL 4273 -CS4273
20 208-16037 208-16038 CAROLINA SEAL EP787 -CSEP787
21 208-16039 208-16040 PAI 9703 -9703
22 208-16041 208-16042 CAROLINA SEAL 5350 -CS5350
23 108-20135 108-20136 SIMRIZ 7295 -SZ7295
24 108-20156 108-20157 WHITE FOOD GRADE EPDM -EPWFG
25 208-0776 208-0777 CAROLINA SEAL 4560 -CS4560
26 208-29422 208-29423 VSP0-10E40-VITON A (FDA) -VSPE40
27 208-29434 208-29435 VSPO-10E21-KALREZ 6375 -VSPE21
28 208-29436 208-29437 VSPO-10E41-CHEMRAZ 505 -VSPE41
29 208-29438 208-29439 VSPO-10E22-VITON GFS -VSPE22
30 208-29440 208-29441 VSPO-10E10-VITON B -VSPE10
31 208-29442 208-29443 VSPO-10E01-BUNA-N -VSPE01
32 208-29444 208-29445 VSPO-10E03-EPDMF PC -VSPE03
33 208-29446 208-29447 VSPO-10E11-NEOPRENE -VSPE11
34 208-29448 208-29449 VSPO-10E17-WHITE NITRILE -VSPE17
35 208-29450 208-29451 (VSPO-10E16-NEOPRENE, WHITE (FDA) -VSPE16
36 208-29452 208-29453 VSP0-10E25-VITON GFLT -VSPE25
37 208-29454 208-29455 VSPO-10E28-WHITE EPDM -VSPE28