Filling aircraft on-board O2 cylinders for commercial, military and private fleets. Transferring O2
into various high-pressure receivers for deep ocean
diving support, commercial or military. There are just
two examples of the uses for Model 26968 oxygen
boosters that have provided cost savings and
increased safety for many years.
This model will pump from high- or medium-pressure
sources and will also function effectively to collect
and transfer the gas from partially depleted
supply cylinders to “top off” other cylinders to
maximum pressure. Conventional industrial,
shipboard or contractor-type compressed air
sources are normally used for power. All motive
power and controls are completely pneumatic with
no electrical connections required.
The basic booster is two-stage, rated for continuous-duty compression ratios of over 15:1, intermittent to
A pneumatic control package continually monitors
both inlet cylinder pressure and outlet receiver
pressure, stopping the booster automatically when
desired outlet or minimum inlet pressure is reached,
permitting unattended operation.
Drive is a low-friction, slow-speed-cycling air
cylinder, designed for continuous duty without
airline lubrication. Vented distance pieces insure
hydrocarbon-free gas section operation. High-
pressure oxygen seals are wear-compensating,
immune to sudden failure and operate
completely non-lube, oil free.
Very cold air (as low as -20° F) is a natural by-
product from the air-powered drive exhaust. This
frigid exhaust air is channeled through a system
of cooling jackets and an interstage cooler, resulting
in high-pressure cylinder temperatures well
below the limits needed for the long life of critical parts.
Inlet gas supply pressure acts directly through
the opposed-piston construction to assist the air
drive during the compression stroke, conserving
power required by the drive directly in proportion
to the gas supply pressure.
Models & Specifications
Booster: Air-driven, balanced-opposed piston-type, two stage
High-pressure oxygen chambers: Non-lube
hydrocarbon-free, triple sealed and vented from
the drive air chest
High-pressure tubing & fittings: Stainless
steel, 5,000 psi maximum oxygen working
Air drive section: No oil required; corrosion
resistant, factory lubed at assembly; 150 psi max.
Particle filters: Inlet and outlet gas: 5 microns.
All stainless steel
Gauges: Stainless steel tube, solid front 4-1⁄2”
Port sizes: Inlet and outlet gas: “_ NPT female; Air Drive; _NPT female”
Control range adjustment:
Inlet minimum: 150 to 850 psi cutout
Outlet maximum: 800 to 5,000 psi cutout
Safety relief (outlet): 800 to 5,000 psi
Cooling: With air exhaust to both stages and
Noise: 80 dB range pulses, depending on
working pressure (measured at 30 inches from
Maintenance: Simple seal kit replacement
Installation: No special foundation, no tie-down
required and no electrical connections
Outlet stall (maximum gas outlet pressure is: air drive psi x 30 plus 2 x gas inlet psi)
Interstage stall (maximum gas inlet pressure is: air drive psi x 15 if outlet pressure exceeds air drive psi x 30. If it does not, maximum gas inlet pressure is air drive psi x 30)
If less air flow is available, outlet gas rates will decrease approximately in proportion