ABAC ABC7-2112DH2P 15 HP Ironman Duplex Air Compressor - 120 Gallon Horizontal, 175 PSI, 52 CFM C2 Cast Iron Pump

The ABAC ABC7-2112DH2P is the C2 pump machine in the Ironman Duplex Series: two independent 7.5 HP motor and pump assemblies on a single 120 gallon horizontal tank. Each side runs a C2 two-stage cast iron pump rated 26 CFM, for 52 CFM combined at a maximum 175 PSI. Because the two assemblies are separate, one can come down for service while the other keeps air on the line, which is the reason most shops step up to a duplex rather than buying one larger simplex machine. Choose 230V single-phase (ABC7-2112DH2P) or 230V three-phase (ABC7-2312DH2P).

Key specifications

• Models: ABC7-2112DH2P (230V 1-phase) / ABC7-2312DH2P (230V 3-phase)
• Power: 15 HP total (2 x 7.5 HP)
• Pumps: two C2 two-stage pumps, full cast iron construction
• Air delivery: 52 CFM combined (26 CFM per pump)
• Maximum pressure: 175 PSI
• Tank: 120 gallon horizontal
• Power supply: 230/1/60 or 230/3/60
• Drive: belt drive, two independent motor and pump assemblies
• Alternating control to decrease downtime
• Dual control to increase output
• Fully programmable control panel settings
• Warranty: 2 year full, assembled in the USA

What the duplex control actually does

Two pumps on one tank only pay for themselves if the controller uses them properly, and the Ironman Duplex panel is built for that. Alternating control rotates which side leads, so run hours and service intervals are shared instead of one pump carrying the shop while the other sits. Dual control brings both sides on together when demand climbs, for the full 52 CFM. Between the two, each pump runs cooler, rests longer and reaches an oil change later than a single pump doing the same total work, and the panel settings are fully programmable so the changeover matches how your floor actually draws air. The practical benefit is the one that matters on a production day: a belt change, an oil service or a failed pump takes half the capacity offline, not all of it.

How it compares

Across the Ironman duplex machines on the 120 gallon horizontal tank, the pump choice sets the airflow. The 10 HP ABC5-21120HD pairs two C1 pumps for 32 CFM, and the 15 HP ABC7-21120HD pairs two C1 pumps for 42 CFM. This machine keeps the same 15 HP total and the same tank but steps the pumps up to C2 for 52 CFM, which is the cheapest way to add 10 CFM without moving up a motor size or a service panel. Above it, the 20 HP ABC10-23120HD reaches 64 CFM, and the ABC10-2312DHP is the C2 version of that pair. If redundancy is not the point, the single pump 7.5 HP ABC7-2180V2P uses the same C2 pump on an 80 gallon vertical tank in a far smaller footprint. Size on the CFM your tools actually draw, then confirm your panel can carry the phase you pick.

Typical applications

ABAC builds the Ironman Duplex Series for professional work that needs a consistent air supply: metal and wood shops, auto body and repair shops, tire inflation, hammering, grinding, fastening, orbital sanding and equipment operation. In practice that means production floors, multi-bay service centers, fabrication and welding bays, and fleet maintenance operations where several tools draw at once and a compressor going down stops the whole shop. A duplex also suits a shop with a wide gap between its light and heavy demand: one side carries the quiet hours and both run when the floor is full, so neither pump spends the day at full duty.

Power, installation and air treatment

Take three-phase power if the panel has it, since three-phase motors start easier and run cooler on a compressor that cycles all day. Both sides can run together, so size the circuit for the pair even though the control normally alternates them, and leave clearance around the flywheels for cooling air and service access. A 120 gallon receiver collects real water, so plan the drain. A two-stage piston running to 175 PSI also puts warm, wet air into the line, and that moisture carries down to whatever is on the end of it. If the air reaches paint, plasma, pneumatic controls or anything that rusts, pair this compressor with a refrigerated dryer rated at or above its 52 CFM output, such as the ABAC COOL 65 or, for margin on a hot shop floor, the COOL 75, plus a filter regulator at the drop. Browse the rest of our air dryers.

Part of ABAC's Ironman cast iron range from the Atlas Copco group. The C2 build steps up from the 42 CFM C1 duplex while still spreading run time across two pumps, which keeps each one cooler and shortens recovery under heavy demand. See the rest of our piston air compressors.