Pneumatech PMNG Series, Installation, Operation & Maintenance Manual

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Inside the PMNG nitrogen generation unit, the first item
the feed air comes in contact with is an inlet isolation
valve, which is shipped loose for installation in the field.
For systems with the optional EconoMizer™, an air
actuated ball valve. Next is the 6-Step filtration system,
which utilizes a combination of particulate, coalescing
and carbon adsorption technologies. Oil carryover from
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 air
circulation heater and controls, and is installed in the air
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 instrument
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
AIR AIR
INLET INLET
MANUAL MANUAL
PURITY PURITY
CONTROLLER CONTROLLER
OXYGEN OXYGEN
ANALYZER ANALYZER
NITROGEN
NITROGEN
VENT
VENT
COALSECING COALSECING
FILTERS FILTERS
CARBON CARBON
BED BED
PARTICLE PARTICLE
FILTER FILTER
P
S
ECONOMIZER ECONOMIZER
PRESSURE PRESSURE
SWITCH SWITCH
AUTO
AUTO
PURITY PURITY
CONTROLLER CONTROLLER
ECONOMIZER
ECONOMIZER
VALVE VALVE
DRAIN
DRAIN
6-Step Filtration
EconoMizer™
2-Way Valve
Heater