Figure 8-5.--Type No-2 gaseous oxygen servicing trailer.
lower/outlet shutoff valves from the outlet side of the
necessity of removing the cylinders. When not in use,
regulators, a delivery pressure gauge, and a flexible
the valve adapter should be fitted with a dust cap.
hose that connects the lower manifold to the drier
SHUTOFF VALVES.--There are four shutoff
assembly.
valves, one on the inlet side of each pressure regulator
DRIER ASSEMBLY.--The drier assembly is a
and one on the outlet side of each regulator. These
reservoir containing a chemical drying agent through
shutoff valves control the flow of oxygen from the
which oxygen must pass before going through the
upper manifold to the lower manifold, via the regulator.
servicing hose. This chemical drier is provided to
When the shutoff valves on the inlet and outlet
remove any moisture in the oxygen supply. The oxygen
sides of the regulator are open, the pressure regulator is
flows into the bottom of the drier, passes up through the
ready for use. By turning the regulator control handle
drying agent, and out through the servicing hose.
clockwise, the pressure (as read on the gauge attached
to the regulator) will increase. Turning the control
SERVICING HOSE AND LINE VALVE.--The
handle counterclockwise decreases pressure.
servicing hose is a high-pressure, non-linking, metallic
flexible hose. The line-servicing valve is attached to the
LOWER MANIFOLD.--The lower manifold
servicing hose and is used to control the flow of oxygen
provides connections/mountings for the two
to the system being charged.
8-11
