A. Lower receiving or upper discharge valve broken or stuck open.
71. Q. If a receiving valve breaks or sticks open, how may it be
located?
A. The air will flow back to the atmosphere as the piston moves toward
the defective valve and may be detected by holding the hand over the
strainer.
72. Q. If a receiving valve in a cross-compound compressor breaks, what
may be done?
A. Remove the broken valve, blocking the opening made by its removal,
and as there are two upper and two lower receiving valves the compressor
will now take air through the other valve.
73. Q. If an intermediate discharge valve breaks or sticks open, how may
it be located?
A. No air will be taken in to that end of the compressor as the piston
moves from the defective valve, and may be located by holding the hand
over the strainer.