through the check valves CV1 and CV2. One or two nitrogen tanks may be used with the operation of the servicing cart.
The check valves prevent nitrogen gas from escaping if only one tank is connected.
Gauge, G1, monitors nitrogen supply pressure available from the tanks. Low pressure regulator, R1, allows the user to
adjust the available pressure to the desired pressure as measured by gauge, G2. This regulated nitrogen is available at
the 1/4 inch quick disconnect coupler, C4. This output is typically used for inflating tires. A maximum of 160 psi working
pressure is available at this output. This same pressure can be used to drive booster pump, P, via pump drive valve, V1.
The pump is a double acting, single stage, air or gas driven booster pump with a compression ratio of 30: 1. The
booster pump is capable of continuous operation at outlet temperatures of up to 300 degrees F and the booster system
can provide a 4000 psi maximum working pressure output at connector, C5, for charging aircraft struts and accumulators.
The pump drive pressure can be supplied either from the tank source or shop air.
Shop air is connected to the system via quick disconnect coupler, C3. This pressure is used for driving pump, P, and is
adjustable with the use of R3 located under the label designated "Shop Air Inlet". Check valve, CV2, prevents nitrogen
from escaping via quick disconnect coupler, C3.
An air pilot valve integral with pump, P, monitors the tank supply pressure and will shut off the pump drive pressure when
the nitrogen supply pressure is below 300 psi. The filter, Fl, separates water and particulate contaminants from the shop
air source and has an automatic mechanical drain to remove the contaminants from the filter bowl. The high pressure
filter, F2, prevents extremely fine particulate matter and contaminates from entering the booster system.
Gauge, G3, allows the user to monitor pump output pressure and high pressure regulator, R2, permits the user to adjust
the high pressure output at connector C5. The adjustable, regulated pressure output is measured by gauge, G4. Valve,
V3, is the shut off valve for the high pressure output. Valve, V4, is part of the high pressure charging hose and is used to
control the application of high pressure nitrogen.
High pressure vent, V2, exhausts excess nitrogen during the adjustment of high pressure regulator, R2 and is used to
bleed the entire booster pump system. Relief valves, SV1 and SV2, limit the low and high pressure in the system
respectively to safe levels in the case of misapplication of air sources or malfunction of the system. The low pressure
relief valve, SV1, is set to crack at 175 psi to limit pneumatic pressures applied to the system and to prevent tire blow
outs. SV2 is provided to limit the high pressures generated in the booster pump system and has a mechanical stop
limiting the maximum pressure to 4,200 psi.