Castair I718HC1: 7.5 HP Single-Phase Industrial Air Compressor, 80-Gallon Horizontal Tank
The Castair I718HC1 is a 7.5 horsepower, single-phase industrial reciprocating air compressor on an 80-gallon horizontal ASME tank with the C1 pump configuration, without the factory aftercooler. The aftercooler-equipped version is the I718HC1-S.
The C1 pump runs at 895 RPM and delivers 32.4 CFM free air at 0 PSI, 24.8 CFM at 175 PSI. At 655 lbs and a 64x20x48 inch footprint, this is the lighter of the two 80-gallon horizontal options in the 7.5 HP single-phase series. The horizontal tank configuration suits shops where a lower-profile unit fits better than a vertical tank.
Industrial Cast Iron Pump — C1 Configuration
- All cast iron construction: Cylinder, head, crankcase — no aluminum
- Pump speed: 895 RPM
- Tapered roller bearings: Both ends of crankshaft
- Precision steel connecting rods: Automotive-type insert bearings
- Disc and spring valves: Serviceable and reliable under industrial load
- 4-ring pistons: Better sealing, less oil carryover
- Centrifugal unloader: Loadless start every cycle
Technical Specifications
- Model: I718HC1
- Horsepower: 7.5 HP
- Phase: Single-phase (1-phase)
- Voltage: 230V
- Tank capacity: 80 gallons
- Tank type: Horizontal (HC)
- Pump RPM: 895
- Free air delivery (CFM @ 0 PSI): 32.4 CFM
- Delivery at working pressure (CFM @ 175 PSI): 24.8 CFM
- Maximum working pressure: 175 PSI
- Dimensions (L x W x H): 64 x 20 x 48 inches
- Weight: 655 lbs
- Aftercooler: Not included (see I718HC1-S for aftercooler version)
I718HC1 vs. I718HC1-S
The I718HC1 and I718HC1-S are the same compressor. The -S suffix on the I718HC1-S indicates a factory-mounted beltguard aftercooler (#BGAC1M, 35 CFM rated). If you are doing spray painting or moisture-sensitive work, add the aftercooler — either factory-mounted (-S) or as a field-installed option. For general tire service, impact wrenches, and air ratchets where moisture is less critical, the base I718HC1 is appropriate.
When Does a Shop Need This vs. Stepping Up or Down?
Choose the I718HC1 if: You need single-phase power, horizontal tank orientation, want to source your own aftercooler, and your demand fits within 24.8 CFM at 175 PSI.
Step up to I718HC2-S if: You want more CFM (28.1 at 175 PSI) from a slower, quieter C2 pump, or if noise is a factor in your shop.
Step up to 120-gallon if: Tank recovery time between cycles is causing production slowdowns.
Why Buy From Air Compressor Factory Direct?
We carry the complete Castair industrial series. Call us to confirm specs, compare configurations, and get honest advice on whether this unit fits your shop. Free shipping on qualifying orders. Free tech support. Full manufacturer warranty.
Call 866-217-0063 for quick answers and help!
