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Inside the PMNG nitrogen generation unit, the first ite
the feed air comes in contact with is an inlet isolatio
valve, which is shipped loose for installation in the field.
For systems with the optional EconoMizer™, an ai
actuated ball valve. Next is the 6-Step filtration system,
which utilizes a combination of particulate, coalescing
and carbon adsorption technologies. Oil carryover fro
system is expected to be in the 2 parts per billion range,
with maximum solid particle size .1 micron. All filters
are fitted with automatic condensate drains. The
optional panel mounted differential pressure switch-
gauge (if fitted) measures the filter system pressure drop.
If the pressure exceeds the 10 PSID setting a warning
message is displayed. Most units are fitted with the ai
circulation heater and controls, and is installed in the ai
stream before the nitrogen membrane(s) but after the
final filter and pressure regulator. This heater maintains
a constant temperature of compressed air to the
membranes enhancing stability and performance.
Controls for the heater are installed on the instrumen
panel.
4.0 DESCRIPTION OF SYSTEM -
The PMNG Cabinet Series membrane nitrogen generator is a
modular system consisting of pre-filtration, separation, and distribution sections. Controls for the
system are included in the nitrogen separation unit.
Ambient air enters the feed air compressor, which is typically an oil injected rotary screw air
compressor via its inlet filter. Air is compressed and travels through an aftercooler and, in most
systems, a refrigerated air dryer.
OPTIONAL EQUIPMENT
MEMBRANE N
2
SYSTEM
MEMBRANE
MEMBRANE
BUNDLES
BUNDLES
HEATER
HEATER
AI R
AI R
INLET
INLET
MANUAL
MANUAL
PURITY
PURITY
CONT ROLLER
CONT ROLLER
OXYGEN
OXYGEN
ANALYZER
ANALYZER
NITROGEN
NITROGEN
VENT
VENT
COALSECING
COALSECING
FILTERS
FILTERS
CARBON
CARBON
BED
BED
PART ICLE
PART ICLE
FILTER
FILTER
P
S
ECONOMIZER
ECONOMIZER
PRESSURE
PRESSURE
SWITCH
SWITCH
AUTO
AUTO
PURITY
PURITY
CONT ROLLER
CONT ROLLER
ECONOMIZER
ECONOMIZER
VALVE
VALVE
DRAI N
DRAI N
6-Step Filtration
EconoMizer™
2-Way Valve
Heater
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