Companion 1000/T Liquid Oxygen System Technical Manual
5-10
Service and Repair
B-701964-00 Rev. C
1. Temporarily reinstall the oxygen outlet barbed fitting
9
in the flow control valve.
Connect 50-75 psig (345-518 kPa) oxygen to the valve's outlet barbed fitting.
Temporarily install the valve knob
2
on the rotor shaft.
2. Slowly rotate the valve knob through all flow settings (Figure 5-11). Gas flow
should be audible at each flow position, indicating that the appropriate orifice is
open.
Figure 5-11: Back-flushing the Flow Control Valve
Figure 5-12: Flow Control Replacement Parts
5.6.3
Repair
Repair to the flow control is limited to replacement of the seal disc and backplate
(Figure 5-12). Do not disassemble the flow control further. Always verify flows are
within specifications at all settings before putting the unit into service.
5.6.4
Installation
Install the flow control valve by reversing the removal procedure (Section 5.6.1).
5.7
PRIMARY RELIEF VALVE
The primary relief valve is a poppet-type, pressure-regulating valve that controls the
Companion 1000/T system pressure. The primary relief valve is not field serviceable. If
it is not operating properly, replace it.
50 PSI
(345 kPa)
NOTE:
Beveled edge toward backplate
Backplate
O-Ring
Flow Control Body
Seal Disc
O-Rings
1
2
ITEM
P/N
DESCRIPTION
1
777509
Seal Disc
2
776387
Backplate, (12 position flow control) C1000
701324
Backplate, (12 position flow control) Companion T
•
Ensure that only one flow control valve inlet filter screen is in place before installing
the flow control valve. Use of more than one screen may restrict flow.
•
Do not overtighten the tube nut on the warming coil. Overtightening may result in a
cracked fitting. Only a slight increase in torque is required to seal a compression
fitting that has already been made up.
Summary of Contents for COMPANION 1000
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