JS PRESSURE RELIEF VALVES
© 2017 Kelso Technologies (USA) Inc. All Kelso Valves are Patent Protected. Detailed designs are subject to change without notice.
Kelso Technologies Inc. 1526 Texas Ave, Bonham, TX. 75418, Phone: (903) 583-9200
Document No. - KTUD112
Revision 6 – 2/7/2022 (Original Release 12/7/2015)
Adjustment Screw Assembly
1/4 – 20 x 2” Hex Cap Screw
1/4 – 20 Nylon Insert Lock Nut
Hex Bolt 5/16 - 18 x 3/4” Zinc Grade 5
1/4 – 20 x 1/2” Hex Cap Screw
Nameplate Screw (Not Shown)
*The number of spring laminations can vary, replace with like assemblies.
7/16, 1/2, 9/16, 13/16, 15/16, 1 5/8, 1 7/8
400 Grit Alum. Oxide Emery Cloth
2.0 Valve Installation
Only companies and their personnel which are certified by the Association of
American Railroads shall perform maintenance and testing of Kelso pressure
relief valves, pursuant to either M1002 or M1003.
2.1 Preliminary Considerations
New valves are tested, adjusted, and sealed at Kelso. If a new valve has been
left in its original packaging, it is undamaged, and it is not more than six months
old, it may be installed on a tank car without retesting or recalibration. If the
valve has exceeded six months, it must be returned for retesting and
recalibration. Prior to installation, ensure that the valve remains clean and that
the gasket sealing surfaces are not damaged in any way, shape, or form.
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