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SYSTEM and PRODUCT INFORMATION
Dry Pipe Nitrogen Inerting (DPNI)
Dry Pipe Nitrogen Inerting technology was developed by Engineered Corrosion Solutions, LLC, (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 fourteen (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 an on-site 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 external bypass valve, in conjunction with a separate air
compressor, for maintenance or “fast fill” needs 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 ECS 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
• Programmable automatic drain function
• Minimal maintenance requirements
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