Table of Contents
Advertisement
150-819-100-03
Pressure-relief Valve and Air Stem
The pressure-relief valve keeps the internal pressure between 12 and 25 PSI. The air stem is a threaded Schraeder
valve (similar to a car tire valve) and cap. Use it to pressurize the enclosure from a local pressure source or to
measure the enclosure's internal pressure through a pressure gauge or to relieve the internal pressure prior to
opening and removing the cover by removing the air stem valve core (pin).
List 1 and List 2 units are filled with nitrogen and pressurized before shipment. The internal
pressure must be relieved every time the cover is removed from the units. Failure to do so may
cause personal injury or equipment damage. Before shipment, the List 2 stub is also
pressurized, separately from the enclosure, through an air stem valve located in the end of the
stub.
HRE-819 List 1 and 2
July 9, 1998
Overview
7
Advertisement
Table of Contents
