7.1 Testing Valves in Storage
Valves that are set and sealed by Kelso Technologies, have been left in their
original packaging, are undamaged, and are no more than six (6) months old,
may be installed without being retested. If the valve has exceeded six months
since its last documented test day, it must be returned for retesting and
recalibration.
7.2 Valve Repair
Repair work on pressure relief devices involving machining, grinding, welding or
other alterations and modifications can only be performed by the valve
manufacturer, or the car owner or user, with the valve manufacturer's permission.
The flat gasket face on the valve body mounting surface or the gasket tongue,
may be machined to remove nicks and burs. (AAR M1002 Appendix A,
Paragraph 3.11). Unless otherwise specified standard tolerances for decimal
dimensions are +/- 0.003 in.
The tolerances on the gasket tongue must not be exceeded.
8.0 Special Guidelines
Determining Applicable Pressure Values:
Refer to AAR publication “Regulations for Tank Cars”. Appendix A applies
specifically to valves. This section prescribes the start-to-discharge pressure
(STD), the vapor-tight pressure (VTP), and their tolerances.
Test Stand and Pressure Gauge Requirements:
It is recommended that the test stand mounting must be equivalent to the AAR
M1002 figures in Appendix E for the valve being tested. The pressure gauge must
meet the requirements of AAR M1002 Appendix D 4.5 “Test Gauge Standards”
and must be date-tagged accordingly.
9.0 Warranty
See the Warranty Terms and Conditions.
10.0 Appendix
1. The Kelso JS75/S, JS75H/HS, JS165H/HS, and JS75XH/XHS Pressure
Relief Valves can be fitted with a flue. The flue can direct the flow from the
valve upwards to vent through the top cover of the protection housing for the
top fittings. In addition, the flue is designed to make the valve tamper
resistant. The flue is attached to the valve flange with (4) bolts and a cap,
attached by set screws, covers the adjustable portion of the valve. Valves
that come fitted with a flue will not have a dome cover.
2. Kelso Pressure Relief Valves can be outfitted with a debris screen. The
debris screen aids in preventing foreign material and nesting insects from
entering the valve. Screens are secured around the valve body by a single
pin.
To Next Page
Loading...