Sec. 25.1433 - Vacuum systems.
There must be means, in addition to the
normal pressure relief, to automatically relieve the pressure in the
discharge lines from the vacuum air pump when the delivery temperature of
the air becomes unsafe.
[Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as
amended by Amdt. 25-72, 55 FR 29785, July 20, 1990]