The Castair C2 is a 7.5-10HP two-stage cast iron bare pump with a V4 cylinder arrangement and flywheel. This is a pump-only unit — no motor, no tank, no base. You supply the motor and mount the pump into your compressor package. At 7.5-10HP with two-stage compression and a V4 cylinder layout, this pump is built for sustained high-demand applications: multi-bay auto shops, fleet maintenance facilities, body shops with continuous spray gun demand, and light manufacturing with multi-tool pneumatic circuits.
The V4 cylinder arrangement — four cylinders in a V configuration — provides more displacement per revolution than a 2-cylinder design, which is how Cast Air can cover the 7.5-10HP motor range with good volumetric efficiency. Two-stage compression means the air is compressed in two steps with intercooling between stages, which reduces discharge temperature and moisture carryover compared to single-stage designs at equivalent pressures.
Key Features
- 7.5-10HP Motor Compatibility: Wide HP range gives flexibility in motor selection for rebuilds and new builds
- Two-Stage Compression: Two-step compression with intercooling — lower discharge temps, reduced moisture in compressed air, better efficiency at higher pressures
- V4 Cylinder Configuration: Four cylinders in a V arrangement for high displacement in a compact package
- Cast Iron Construction: Cast iron cylinders and valve seats for long service life under commercial duty cycles
- Flywheel Included: Flywheel for V-belt drive connection — verify groove and diameter specifications for your motor pulley match
- Bare Pump: Motor, tank, and base not included — you configure the complete compressor package
Technical Specifications
- Part Number: C2
- Pump Type: Two-stage reciprocating, V4 cylinder arrangement
- Motor Compatibility: 7.5 to 10HP
- Cylinder Material: Cast iron
- Drive: V-belt via flywheel
- Manufacturer: Cast Air
- CFM output, max working pressure, flywheel OD, belt groove specifications, RPM range, oil capacity — contact us for complete specifications.
When the C2 Is the Right Pump
- Pump Replacement: Original pump is worn or failed; the motor, tank, and frame are serviceable — replace just the pump head with the C2
- New Build, 7.5-10HP Range: Spec'ing a custom compressor for a specific application — the C2 is the pump for this HP range
- Multi-Bay Auto Shop: 7.5-10HP two-stage output handles simultaneous impact wrenches, air ratchets, and tire equipment across multiple bays
- Body Shop with Continuous Spray Demand: Two-stage efficiency and adequate CFM for sustained spray gun use
- Fleet Maintenance: High-duty-cycle environment where continuous-run performance and pump longevity matter
C1 vs. C2 vs. C3 — Choosing the Right Pump
- C1 (4-7.5HP, inline 2-cyl): Single-bay shops, light commercial, moderate duty cycle
- C2 (7.5-10HP, V4): Multi-bay shops, body shops, fleet maintenance, higher duty cycle
- C3 (15HP, W3): Large multi-bay facilities, production shops, continuous heavy demand
Why Buy From OEM Diagnostic Tools?
We stock Cast Air bare pumps and compressor components for commercial shops and industrial applications. Specialist supplier since 2016. Free shipping on qualifying orders. Call us before you order a replacement pump — we can confirm the C2 matches your existing motor and frame, or help you spec the motor and belt drive for a new build.
Call 866-217-0063 for pricing, availability, and help!
