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SYSTEM and PRODUCT INFORMATION
Dry Pipe Nitrogen Inerting (DPNI)
Dry Pipe Nitrogen Inerting technology was developed by Engineered Corrosion Solutions (ECS) and is used
to control oxygen corrosion in dry pipe and/or preaction fire sprinkler systems. DPNI is executed by
employing a “fill and purge” differential pressure cycle (breathing) within the sprinkler pipe network. The
“fill and purge” pressure cycle consists of venting the system pressure by 3-5 psi (.2-.3 bar), followed by
replacing the vented pressure back into the system. This breathing process uses a nitrogen rich gas stream,
typically 98% or greater, for a specific length of time (typically 14-days or less), until a nitrogen-rich, or
inert, atmosphere exists within the sprinkler pipe network. By changing the atmosphere inside the pipe
network to 98% or higher nitrogen content, the available oxygen content is reduced to a level that will
not allow appreciable corrosion of the fire sprinkler pipe. With the level of oxygen corrosion reduced to
near zero the effective life of the fire sprinkler system is greatly extended. Systems that implement a DPNI
corrosion control strategy should never develop leaks when maintained properly.
Dry Pipe Nitrogen Inerting Equipment
Nitrogen Generator
The AdvancedIQ Nitrogen Generator is a wall mounted, “plug and play” nitrogen generation system is
designed to facilitate the Dry Pipe Nitrogen Inerting (DPNI) for controlling oxygen corrosion in dry pipe
and preaction fire sprinkler systems. The nitrogen generator can be used in cold storage/freezer to
provide added benefit of ice plug mitigation. The human machine interface (HMI) display screen allows
for easy operation and complete control of the nitrogen generator as well as the ability to communicate
with the nitrogen generator from anywhere in the world. Access to nitrogen generator operation,
maintenance, diagnostics and stored historical data is easily obtained through the HMI screen on the
nitrogen generator or remotely through the internet. The Nitrogen Generator includes an integral oil-less
compressor and a 3-way valve that allows the nitrogen generator to be used for maintenance or “fast fill”
needs to meet the NFPA 13 30-minute fill requirement based on the criteria defined in the Technical
Specifications Section. In applications outside of the defined criteria, a separate air compressor can be
used to meet the NFPA 13 30-minute fill requirement. The Nitrogen Generator facilitates “fill and purge”
breathing in the fire sprinkler system and has been paired with a Standard Vent (PAV-D), SMART Vent
(PSV-D/DE) or AvancedIQ Vent (PAV-DQ) installed on the fire sprinkler riser.
Nitrogen Generator Features
The nitrogen generators with the patented “fill and purge” breathing technology include the following
features:
• Removal of corrosive oxygen from the entire sprinkler system in fourteen (14) days or less
• All equipment is installed in the sprinkler riser room for easier installation and servicing
• No refrigerated dryers or nitrogen storage tanks required
• Interactive LCD touchscreen display
• Bypass alarm indication with sleep mode
• Programmable audible alarm
• Optional remote monitoring and email alerts
• Nitrogen generation system monitoring
• Membrane separation technology with 20-year service life
• Minimal maintenance requirements
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