S42N5D Gas Booster System

5 to 1 Boost Ratio, 0-16 scfm Flowrate

This dual gas booster system uses shop air to boost the pressure of an inert gas stream. The maximum discharge pressure is the sum of the gas inlet pressure and 4 times the shop air pressure. The table below shows the maximum flowrate capability with 80 psi shop air and a typical range of inlet and discharge gas pressures.

Booster Construction

The major components of the gas booster are anodized aluminum. The hardware components, check valves and piston rod are stainless steel. The air cylinder and gas cylinder are seperated by a distance piece which prevents cross contamination between the shop air and the gas. The boost cylinder has a cooling jacket which uses exhaust air from the drive cylinder as the cooling medium. The booster is non-lubricated, and uses filled Teflon® ; piston seals and rod seals. It requires no electricity, cooling water, or air-line lubricator and is explosion proof.

System Construction

This dual gas booster system utilizes two 5:1 boosters mounted on a 5.5 gallon powder coated carbon steel receiver tank. A framework of aluminum rails is mounted to the tank, creating a sturdy platform to which the twin boosters are mounted. Copper tubing, and brass compression fittings and valves are used to connect the boosters and components. The 5µm drive air inlet filter is constructed of aluminum with a transparent polycarbonate element cover. The drive air regulator is constructed of aluminum with a POM plastic knob and nitrile rubber diaphram. An aluminium and brass inline filter is used to filter the inlet gas. Two liquid filled gauges display gas inlet pressure and discharge pressure. A standard gauge displays drive air pressure.


Shop air is fed into the 4 inch diameter drive cylinders and the gas stream is fed into the 2 inch diameter boost cylinder inlet ports. Both the gas flowrate and the gas discharge pressure can be controlled by throttling the shop air flowrate and/or regulating the shop air pressure. The air pistons reciprocate automatically and drive the gas compressor pistons. When there is no demand for high pressure gas, the boosters stall when the maximum discharge pressure is reached. When there is a need for high pressure gas, the pressure in the discharge line drops which causes the boosters to restart automatically. No shop air is consumed when the boosters are stalled.

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  Maximum Gas Flowrate in scfm Driven with 80 psi Shop Air Pressure
Gas Discharge
Pressure (psi)
Gas Supply Pressure (psi)
60 70 80 90 100
200 19.5        
225 18.5 20.7      
250 17.6 19.5 21.8 24.4  
275 16.0 18.5 20.5 22.2  
300 14.6 17.6 19.4 20.5 23.4
325 12.1 15.0 17.8 18.9 21.8
350 9.8 12.5 14.8 17.6 20.5
375   5.9 7.4 8.8 14.4
400         8.6
5:1 Gas Booster System

5.5 Gallon Tank

Model S42N5D • $8900

  • 5:1 Gas Booster
  • 610 psi Maximum Pressure
  • 5.5 Gallon Receiver Tank
  • Drive Air Regulator
  • 29.3"(L) x21.3"(W) x26.7"(H) • 120 pounds

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