Mini Inert Air Systems
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Mini Inert Air Systems E con om i cal S oluti on f or Pr ote cti n g All You r Tran s f or m e r Oi l Our Mini Inert Air System (MN2) is a lightweight, compact and inexpensive N2 pressure regulating device for virtually all transformer oil preservation applications. Possible uses include oil tanker trucks, transformers, load tap changers and bulk oil storage systems. See back Side foR paRt numbeR configuRation tool. Mai ntai n Tan k Pr ess u r e Designed as an economical solution for protecting transformer oil from oxidation and moisture absorption, the Waukesha® Mini Inert Air System maintains a regulated nitrogen blanket on virtually any oil storage tank system. Like the full size inert air systems, the MN2 utilizes sophisticated pressure regulators and valves to ensure tank pressure stays between 0.2 psi and 5.5 psi at all times. Th r ee-stag e pr ess u r e r e d u ce r adj u stm e nt The pressure reducer assembly regulates the flow of nitrogen gas from supply cylinder to storage tank in three stages: Stage 1 Reduces nitrogen gas flow pressure from the cylinder from 3000 psi to 100 psi. Stage 2 Reduces gas pressure from 100 psi to 7 psi. Stage 3 Reduces gas pressure from 7 psi to 0.5 psi and controls the flow of gas to the tank. Stage 3 regulation can be bypassed for purge applications. The MN2 utilizes replaceable nitrogen tanks and three-stage pressure gauge for low gas supply—MN2 pictured here mounted on portable oil tanker truck (nitrogen tanks NOT included). Tan k pu r g i n g Nitrogen gas pressurizing system may be used to quickly purge the storage tank of contaminated gas or air. Turning the by-pass regulating valve to the by-pass position allows fresh nitrogen to flow directly from the 2nd stage regulator, through a by-pass line, to the tank inlet at 7–8 psi, instead of the 0.5 psi standard regulation. In addition, a manually operated tank pressure relief valve located inside the enclosure helps ensure operator safety when disconnecting pressure lines. 1ST & 2ND STAGE REGULATION LOW CYLINDER PRESSURE ALARM HIGH PRESSURE GAUGE VACUUM/ PRESSURE GAUGE (OPTIONAL) Cabinet SPecifications (3/8” cabinet mounting hardware NOT included) Material: Cabinet – 14 ga. NEMA style carbon steel; Hinge – Piano type, full length of enclosure; Cabinet Handle – Quarter turn latch w/ provision for padlocking PRESSURE RELIEF VALVE Sealing Provisions: Rubber door gasket Viewing Port: 5-1/2” diameter polycarbonate BY-PASS VALVE Exterior Finish: ANSI 70 (gray) polyurethane topcoat TERMINAL BLOCK External Seams: Continuously welded Mechanical Strength: For added rigidity, all internal components are mounted on back of inside panel TANK DRAIN VALVE NOTE: CLOSE CYLINDER VALVE BEFORE OPENING INLET Wiring: FEP wire with ring tongue terminals Custom cabinet options available upon request to meet specific customer needs.

Build Your Own Part Number Using Configuration Below MN2 - XXXXXX NOTE 3/8” cabinet mounting hardware not supplied with unit. MATERIAL: 14 GA. STAINLESS STEEL LATCH: QUICK RELEASE 1030-1134 MATERIAL: FIBERGLASS 18 x 16 x 10 LATCH: PADLOCKABLE 1030-1120 MATERIAL: 12 GA. STAINLESS STEEL LATCH: PADLOCKABLE 1030-1491 MATERIAL: 14 GA. HOT ROLLED PICKLED LATCH: QUICK RELEASE 1030-1095 MINIATURE N2 SYSTEM REMOTE CYLINDER SYSTEM TYPE STANDARD ANSI 70 GREY PRESSURE VACUUM GAUGE W/ ALARM CONTACTS 1030-1126 *TANK ALARMS ALSO AVAILABLE ON GAUGE (OPTION 3). NOT APPLICABLE FOR USE WITH N2 GENERATOR. 14.0...