30
Part No. 6-847703-00 Rev. C00
Operation
Manifold System Components
Refer to Figures 19 through 23.
Master Valve Multi-turn high-pressure valves
allow flow from liquid containers or high-pressure
cylinders to be shut off. Master valves use
metallic seating surfaces. Both master valves
should always be turned to fully open, maximum
counterclockwise position.
Bank Regulator A dome loaded, single stage,
diaphragm type regulator. Used to reduce
incoming pressure to a lower intermediate
pressure. Bank regulator (one for each bank) has
an internal adjusting spring used to set a "base"
pressure of approximately 70 PSI (210 PSI on
some models). The "dome" (i.e. bonnet or bell) of
regulator is a pressure tight chamber. When
pressure is applied to dome, amount of force
applied is added to force of adjusting spring. For
example, when 55 PSI of pressure is applied to
the dome, 70 PSI base pressure setting is raised
to approximately 125 PSI.
Secondary Supply Pressure Switch An
adjustable, single pole, normally open pressure
switch. A pressure switch is connected to high
pressure port of each bank regulator in order to
monitor pressure in each bank of liquid containers.
When adequate pressure is applied, switch
contacts are held closed. When cylinder pressure
drops to switch setting of 100 PSI (250 PSI for
some models), switch contacts will open.
Check Valve Soft-seal check valves are
provided downstream of each bank regulator and
on high-pressure reserve header inlet to allow
service of upstream components while the
manifold is in use.
Intermediate Relief Valve Protects components
between bank regulators and line regulators in
event of an overpressure condition caused by
bank regulator or high-pressure reserve header
regulator failure. Outlet of relief valve is piped to a
common relief valve port on top of manifold.
Reserve In Use Pressure Switch An adjustable,
single pole, normally open pressure switch.
Monitors intermediate pressure. When adequate
pressure is applied, the switch contacts are held
closed. When intermediate pressure drops to the
switch setting of 80 PSI (210 PSI for some
models), switch contacts will open. Activation of
switch indicates both manifold banks have been
depleted and flow is being provided by high-
pressure reserve header assembly.
Line Regulator Isolation Valve Quarter-turn ball
valves are provided upstream and downstream of
each line regulator. These valves allow for
removal and servicing of one line regulator while
other is in use. All four isolation valves are
normally in open position.
Line Regulator A single stage, diaphragm type
regulator used to reduce manifold's intermediate
pressure to normal hospital line pressure. Two
line regulators are provided per NFPA 99
requirements to allow for isolation and service of
one while other is in use.
Line Relief Valve A relief valve to prevent over-
pressurization of hospital piping system by failure
of a line regulator. Outlet of relief valve is piped to
a common relief valve port on top of manifold.
Dome Regulator A single stage, diaphragm type,
relieving regulator used to limit amount of
pressure provided to domes of bank regulators.
Dome regulator is not used on oxygen manifolds
with 55 PSI delivery pressures.
Solenoid Valve A 24 VDC, solenoid assembly,
used to direct dome bias pressure to one of bank
regulators. As dome bias pressure is directed to
one of bank regulator, dome of other bank
regulator is vented through solenoid valve.
