The Castair Aftercooler Option Bundle AOC3D (Duplex) 230V is the complete factory-installed options package for Cast Air C3 duplex compressor systems on 230V electrical service. Two 15 HP C3-series cast iron two-stage pumps share a common tank with automatic alternation and failover — this bundle provides dual aftercooling, automatic drains, hour metering, dual control, intake silencing, and vibration isolation factory-installed and matched for the C3 duplex platform. Bundle pricing saves 10% over ordering each component separately.
The C3 at 15 HP per pump head produces approximately 50 CFM at 175 PSI per pump. Running duplex, the system has roughly 100 CFM combined capability with full redundancy. If one pump goes down for scheduled maintenance or a fault condition, the second takes over automatically — production continues without interruption.
What the AOC3D 230V Bundle Includes
Dual Aftercooler System
- Dual Belt Guard Aftercoolers (#BGAC2x2M): Two factory-mounted aftercoolers, 100 CFM total rated capacity — one per C3 pump head. Cools both pump discharges before air reaches the shared tank. Removes approximately 65% of water vapor across the full output range. Max 250 PSIG, max 350°F inlet temperature.
Automatic Drain System
- Air-Operated Auto Drain (#ADVSM): Automatic condensate purge on each compressor cycle, powered by discharge pressure. Complete installation kit included.
- Electronic Auto Drain (#SDV03M): 115V timer-controlled solenoid drain with strainer. Handles off-hours condensate accumulation in the tank and aftercooler separator — critical at this scale where tank volumes are large.
Hour Meter
- Hour Meter (#HRM75M): 230V-rated elapsed time meter. Tracks actual run hours for each pump to balance maintenance intervals in the duplex configuration. Schedule Pump A for service at its oil change interval while Pump B keeps the facility running — this is the operational advantage that justifies duplex investment.
Dual Control
- Dual Control (#DC3): Start/stop and constant-speed load/unload modes. At 15 HP per head, the energy and wear savings from constant-speed operation during production hours are significant. Dual control gives you operational flexibility across varying demand periods.
Intake Noise Silencers
- Intake Noise Silencers (#SA100x2M): Two factory-mounted silencers, one per pump head. Addresses intake noise from both W3-configuration C3 pumps running at 795 RPM without restricting airflow.
Vibration Management
- Vibration Pads (#VP1004): Set of four heavy rubber isolation pads. Two 485-lb pump assemblies on a shared tank require proper vibration isolation — this is not optional on equipment of this scale and weight.
Right From Start Kit
- #RFS003: Cast Air startup kit for C3 pump family. Correct oil fill (1 gallon per pump head) and break-in documentation for both heads. Follow Cast Air's break-in procedure on both pump heads — the C3 is a significant investment and proper initial startup protects that investment.
Who Needs the AOC3D 230V Bundle
This bundle is for facilities installing a Cast Air C3 duplex compressor on 230V service. If your facility has 460V three-phase, see the AOC3D-460 bundle. The 230V version covers single-phase and three-phase 230V service.
At this scale and power level, the C3 duplex is used in body shops with active spray booths, commercial facilities with multiple sustained air users, and any environment where compressed air downtime is not acceptable and 460V service isn't available.
C3 Duplex 230V vs. Other Configurations
- C3 Simplex 230V: One pump, lower cost. Service the pump and you lose air. The right choice when downtime can be scheduled.
- C3 Duplex 230V (this product): Two pumps, automatic backup, maintenance without downtime. Pay the premium when your operation can't stop.
- C3 Duplex 460V: Same equipment, higher voltage. If your facility is on 460V three-phase, the AOC3D-460 is the correct bundle.
Technical Specifications
- Voltage: 230V (single-phase or 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: #HRM75M (230V)
- 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
Factory-installed option package. All components factory-mounted and tested on your C3 duplex compressor before shipment. Contact us at 866-217-0063 or Cast Air at (320) 796-0851 for current pricing and lead times.
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. Call us for a C3 duplex — we'll verify CFM requirements, electrical service, and whether simplex or duplex makes sense for your operation before you commit to this level of investment.
Call 866-217-0063 for quick answers and help!
