The Castair Aftercooler Option Bundle AOC3D (Duplex) 460V is the complete factory-installed options package for Cast Air C3 duplex compressor systems on 460V three-phase power. The C3 duplex pairs two 15 HP cast iron two-stage pumps on a shared tank — one active, one on standby with automatic alternation and failover. At roughly 100 CFM combined capability, the C3 duplex handles the highest sustained air demands while providing genuine redundancy. This bundle covers dual aftercooling, automatic drains, hour metering, dual control, intake silencing, and vibration isolation — all factory-installed and matched for a 460V duplex C3 installation. Bundle saves 10% over individual option pricing.
The C3 duplex is not a common purchase — it's the compressor for facilities that run large spray booths, sandblasting operations, or production manufacturing where air is a utility that cannot go down. If you're evaluating a C3 duplex, you already know why you need it. This bundle ensures the support systems match the scale of the equipment.
What the AOC3D-460 Bundle Includes
Dual Aftercooler System
- Dual Belt Guard Aftercoolers (#BGAC2x2M): Two factory-mounted aftercoolers rated for 100 CFM combined — matched to dual C3 output. Cools both pump discharges before air enters the shared tank. Achieves approximately 65% water vapor reduction across full output range. Max 250 PSIG, max 350°F inlet temperature. Larger than the C2 duplex aftercooler set because the C3 produces proportionally more heat and moisture at 15 HP per pump head.
Automatic Drain System
- Air-Operated Auto Drain (#ADVSM): Discharge-pressure-operated automatic drain with installation kit. Purges condensate on each compressor cycle.
- Electronic Auto Drain (#SDV03M): 115V timer-controlled solenoid drain with strainer. Provides scheduled purge cycles during idle periods. On a facility-scale system like a C3 duplex, the tank and separator volumes are significant — timed drains during off-hours are not optional.
Hour Meters
- Hour Meter (#HRM460M): 460V-rated elapsed time meter. In a duplex setup, run-hour tracking lets you balance maintenance between both pump heads — when Pump A reaches its oil change interval, it comes down for service while Pump B carries the load. This is the entire operational value of the duplex arrangement.
Dual Control
- Dual Control (#DC3): Start/stop and constant-speed load/unload modes for the duplex system. At 15 HP per pump head, constant-speed unloading during production hours saves significant wear on starters and motor windings. The duty cycle implications of start/stop vs. constant-speed are magnified at this power level.
Intake Noise Silencers
- Intake Noise Silencers (#SA100x2M): Two factory-mounted silencers, one per C3 pump head. Reduces intake noise from both W3-configuration pumps at 795 RPM without restricting airflow to either head.
Vibration Management
- Vibration Pads (#VP1004): Set of four heavy rubber isolation pads. Two 485-lb cast iron pump assemblies on a large shared tank produce substantial vibration. Isolation pads are not optional at this scale — they protect welds, connections, and the building structure over the life of the installation.
Right From Start Kit
- #RFS003: Cast Air startup kit for C3 pump family. Two pump heads, two correct oil fills, specific break-in documentation. Critical for initial startup — skipping or approximating the break-in procedure on a cast iron two-stage pump causes early cylinder and ring wear.
Who Needs the AOC3D-460 Bundle
This bundle is for facilities installing a Cast Air C3 duplex compressor on 460V three-phase service. Typical buyers: large body shops, paint booths with high CFM requirements, manufacturing facilities with continuous air demand, commercial tire franchises with multiple bays, and any industrial operation where losing compressed air means losing production.
The 460V three-phase requirement is firm. Confirm your electrical service before ordering. If your facility is on 230V, the AOC3D (230V) bundle is the correct product.
C3 Duplex vs. Other Options
- C3 Simplex (AOC3-460): One C3 pump. Significant CFM output, but service means downtime. If you can schedule maintenance windows, simplex is more cost-effective.
- C3 Duplex (this product): Two C3 pumps. No maintenance downtime. The premium is justified when downtime means lost revenue.
- C4 Duplex: If two C3 pumps (combined ~100 CFM) still don't meet your demand — large manufacturing, multiple heavy users simultaneously — step up to the C4 duplex tier.
Technical Specifications
- Voltage: 460V, three-phase
- Compatible Compressor Family: Cast Air C3 duplex (2x15 HP)
- Aftercooler: #BGAC2x2M (dual), 100 CFM rated
- Max Operating Pressure: 250 PSIG
- Max Inlet Air Temperature: 350°F
- C3 Pump CFM (each, reference): ~62 CFM @ 0 PSI / ~50 CFM @ 175 PSI
- C3 Pump RPM: 795 per head
- C3 Pump Weight: 485 lbs per head
- C3 Oil Capacity: 1 gallon per head
- Hour Meter: #HRM460M (460V)
- Auto Drain: Air-operated #ADVSM + Electronic #SDV03M (115V)
- Dual Control: #DC3
- Intake Silencers: Two (#SA100x2M)
- Vibration Pads: #VP1004 (set of 4)
- Startup Kit: #RFS003
- Bundle Savings: 10% off individual component pricing
What's in the Box
The AOC3D-460 is a factory-installed option package. All components are mounted and tested on your duplex compressor before it ships. Contact us at 866-217-0063 or Cast Air at (320) 796-0851 for current pricing, configurations, and lead times on C3 duplex systems.
Why Buy From OEM Diagnostic Tools?
We've specialized in professional shop equipment since 2016. Free shipping, free pre-sale technical support at 866-217-0063, and full Cast Air manufacturer warranty on every purchase. For a C3 duplex installation, call us before ordering — we can help you verify CFM requirements, electrical service compatibility, and whether duplex is the right call versus a larger simplex unit.
Call 866-217-0063 for quick answers and help!
