Sources Of Compressed Air; Generator Performance; Recommended Configuration; Retrofitting Older Systems - Thermo Scientific Mercury Freedom 80i Manual

Optional Equipment
Nitrogen Generator
Sources of
Compressed Air

Generator Performance

Recommended
Configuration

Retrofitting Older Systems

6-10 Mercury System Manual
Dedicated compressor: A source that is designed to supply compressed air
only to the N system. This compressor system may or may not incorporate
2
a storage tank to smooth pressure and flow fluctuations. The air supply
volume and pressure produced MUST be matched to the demand of the
N system.
2
For a given product flow, the purity of the nitrogen product is higher at
higher operating pressures. For optimum energy efficiency, operation at a
membrane pressure of 90 psig (150 psig compressor) is recommended.
The operating range of the nitrogen membrane modules is 70 – 175 psig.
The Nitrogen Generator system must be supplied with 85 - 100 psig
compressed, dry air (CDA) at the inlet regulator. The Thermo Scientific
Air Handling System feeding the Nitrogen Generator will have a potential
pressure drop of <10 psig, meaning the Nitrogen Generator air input could
drop as low as 75 psi. This pressure would result in a nitrogen output
purity of approximately 97%. Although verified at the factory, the gauge
on the inlet regulator may lose accuracy over time. Verify plant air pressure
with a NIST-traceable pressure gauge to determine if it is adequate to
operate the Nitrogen Generator system.
A kit is available for retrofitting a fielded Mercury System with the
Nitrogen Generator. Contact Thermo Fisher Scientific for detailed
information.
Thermo Fisher Scientific