CAUTION: Uneven Gasket Compression. Do not over-tighten the nuts on one
side of the valve as this may tilt the valve and result in uneven gasket compression.
2.3 Leak Inspection
2.3.1 Test all newly installed valves under pressure to confirm that no leaks are present.
WARNING: Valve Leakage. Improper valve-tongue seating in the flange groove,
loose nuts and damaged gaskets may result in leaks at the valve-mounting joint.
2.4 Valve Operation Notes and Precautions
NOTICE: Operation of the valve must conform with all applicable TC, AAR, DOT
specifications (Parts 173.31, 174.67, etc.), other governmental bodies, and the
operating instructions of your company.
The pressure relief valves are spring-loaded and are actuated by overpressure in
the railcar tank. There are no provisions for manual activation of the valve.
CAUTION: Incorrect Setting. Never adjust the spring compression of a valve while
it is mounted on the vessel cover plate or incorrect settings may result.
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