Warming Coil; Flow Control Valve - CAIRE COMPANION 1000 Technical Manual

Companion 1000/T Liquid Oxygen System Technical Manual
2.1.3
Gaseous Oxygen to FCV
pined
Tubing
EAT
Companion T
2.1.4
B-701964-00 Rev. C

Warming Coil

The warming coil (Figure 2-4) acts as a heat exchanger that transfers heat from the
surrounding atmosphere to the fluid inside the coil. This action vaporizes the liquid
oxygen and warms the resulting gaseous oxygen for breathing. The warming coil on the
Companion 1000 is a series of 3/16 in. wound-aluminum tubing that connects between
the flow control valve and the manifold. The warming coil on the Companion T
consists of two sections of 3/16-in. wound-aluminum tubing and a section of spined
aluminum tubing. The spined tubing enhances the heat transfer characteristics of the
system. This is essential to the operation of the Companion T due to the higher flow
capability (15 L/min) of the unit.
Liquid Oxygen
From Manifold
Warming Coils
EAT
Figure 2-4: Warming Coil

Flow Control Valve

The flow control valve (Figure 2-5) is a rotary, fixed-orifice device consisting of a
moveable rotor with 11 individually sized orifices. When you select a specific flow rate
on the flow control valve, the corresponding orifice aligns between the inlet and outlet
ports of the valve. The calibrated orifice delivers the selected flow when gaseous oxygen
at 22 psig (152 kPa) is present at the valve inlet port. The standard Companion 1000
flow control valve has a flow range of 0 to 6 L/min, and an optional valve is available
with a flow range of 0 to 4 L/min. The Companion T flow control valve has a flow
range of 0 to 15 L/min.
Gaseous Oxygen to FCV
EAT
Companion 1000
Outlet
Orifice
nlet
Figure 2-5: Flow Control Valve
Liquid Oxygen
From Manifold
EAT
Theory of Operation 2-3