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NSU

This innovative design provides large amounts of Nitrogen gas from a liquid Nitrogen tank, for charging aircraft Nitrogen systems of all capacities. Designed to be very simple to operate, the self-pressurising “Nitrogen Servicing Unit” fills aircraft systems safely and quickly from one source of liquid.

The machine is filled with 300 Litres of Liquid Nitrogen which is stored in a 400 psi / 27 bar cryogenic tank. Some of the liquid is boiled off and used to pressurise the tank so as to provide a continuous supply of pressure. A patented internal pump provides high pressure Nitrogen upon demand. After the tank and pump, the liquid is vaporised into gas by aluminium heat exchangers, warmed to ambient temperature and delivered to the control panel for distribution to the aircraft through two hoses and control valves.

As all air forces of the world have requirements for both high and low pressure Nitrogen for filling tyres, struts and accumulators, it makes sense to develop an “all in one” Nitrogen Servicing Unit (NSU). With its internal pump that is always available for use, the NSU can also deliver large quantities of high pressure gaseous Nitrogen for cylinder charging, again both on and off the aircraft.  It can also be used for charging aircraft cylinder trolleys. 

The NSU is designed to handle and dispense both high and low pressure gaseous Nitrogen safely. The tank is designed to DOT 4–L standards and can be operated for life without the need for annual testing.

Features and Benefits

  • Simple to operate.
  • Fills aircraft systems quickly and safely.
  • HP and LP gas from one machine.
  • Continuous pressure, no pressure raising time delays.
  • Highly reliable unit with few moving parts.
  • Low maintenance requirements.
  • Based on robust military design.
  • Standard NATO fill connector.
  • Air transportable in operating condition.
  • Self contained, no electrical power or fuel required.

The NSU saves time, by charging the aircraft systems quicker and eliminating the requirement to handle cylinders.  There is no pressure raising time as the Nitrogen is always available. High and low pressure hoses can be operated simultaneously.

The NSU takes up much less space than the 20 cylinders it replaces and can be stored outside in all weather. It occupies 52 square feet or 4.8 sq metres only and can easily be moved manually or with a towing vehicle.

The cost of gas generated from liquid is less than cylinder gas. There are no costs associated with storing, transporting or changing heavy (80 Kg) gas cylinders and no empty cylinders have to be returned.

OSU

The “Oxygen Servicing Unit” has been designed to supply all Oxygen requirements, both liquid (LOX) and HP and LP gaseous (GOX).
This innovative design provides large amounts of Oxygen gas from a liquid Oxygen tank, for charging aircraft LOX pots and Oxygen cylinders of all capacities. Designed to be very simple to operate, the self-pressuring “Oxygen Servicing Unit” (or OSU) fills LOX pots and aircraft cylinders safely and quickly from one source of liquid.

The machine is filled with 300 Litres of Liquid Oxygen which is stored in a 400psi / 27 bar cryogenic tank. Some of the liquid is boiled off and used to pressurise the tank so as to provide a continuous supply of pressure. A patented internal pump provides high pressure Oxygen upon demand. After the tank and pump, the liquid is vaporised into gas by aluminium heat exchangers, warmed to ambient temperature and delivered to the control panel for distribution to the aircraft through hoses and control valves. The LOX is delivered to an aircraft LOX pot mounted on the side of the OSU. The hose is terminated with a “ground half coupling” for easy and safe transfer of the LOX.

As many air forces of the world have supplies of liquid Oxygen for pilot breathing, it makes sense to develop an “all in one” Oxygen Servicing Unit. This unit can fill LOX pots both on and off the aircraft. With its internal pump that is always available for use, the OSU can also deliver large quantities of high pressure gaseous Oxygen for cylinder charging, again both on and off the aircraft.

Features and Benefits

  • Simple to operate.
  • Fills cylinders and LOX pots quickly and safely.
  • HP and LP gas as well as LOX from one machine.
  • Continuous pressure, no pressure raising time delays.
  • Highly reliable unit with few moving parts.
  • Low maintenance requirements.
  • Based on robust military design.
  • Standard NATO fill connector.
  • Self contained, no electrical power or fuel required.

The OSU saves time, by charging aircraft systems quicker and eliminating the requirement to handle cylinders. The OSU takes up much less space than the 20 cylinders it replaces and can be stored outside in all weather. It occupies 52 square feet or 4.8 sq metres only and can easily be moved manually or with a towing vehicle.
The OSU is designed to handle and dispense both liquid and gaseous Oxygen safely. The tank is designed to DOT 4–L standards and can be operated for life without the nee

Oxygen liquid tank NATO 50 litres

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"Simple to operate. Highly reliable unit with few moving parts. Fills aircraft systems quickly and safely."