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Figure 5: Recommended Installation with a Receiving Tank
4.0
Operation
4.1 Startup
The inlet and outlet connections to the Parker Balston Nitrogen Generator must be checked for
leaks prior to system start-up. After the system is properly installed and checked for leaks, the
inlet gate valve can be slowly opened to introduce compressed air to the system.
During start-up and adjustment of the system, the nitrogen produced by the system will vary in
purity. If the application for the nitrogen is critically dependent on purity, the nitrogen produced
during start-up or adjustment should be vented.
If the outlet nitrogen flow is closed, the system will still consume compressed air. The inlet air
is simply vented to atmosphere through the permeate ports of the membrane module.
4.2 System Adjustment for Desired Outlet Purity
The inlet air pressure must be constant in order for the system to supply nitrogen of consistent
purity to the application. The inlet pressure to the Parker Balston Nitrogen Generator should be
maximized (within process and generator parameters) to optimize the operation of the
membrane module. Nitrogen purities and flow rates for different operating pressures are
shown in tables 3 and 4. The inlet air consumption for different operating pressures at 68°F is
shown in table 5.
A 10 psig pressure difference between the compressed air supply at the inlet and the operating
pressure of the membrane module is normal. If the pressure differential is greater than 10
psig, check the components upstream of the generator. Improperly sized components
such as tubing and regulators will cause an increased pressure drop as will leaks in the
supply line. This pressure loss must be taken into account when determining the inlet pressure
which will deliver the desired purity and flow of nitrogen from the generator.
To adjust the pressure regulator on the front panel of the generator, pull the knob out, adjust
the pressure and push the knob back in to lock the setting.
An optional Parker Nitrogen Analyzer Kit is available to measure nitrogen levels, part number
B04-0605.
7
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