Castair I713HC1-S: 7 HP Single-Phase Industrial Air Compressor, Horizontal Tank with Mounted Starter
The Castair I713HC1-S is a 7 horsepower, single-phase industrial reciprocating air compressor mounted on a horizontal ASME tank and equipped with a factory-mounted magnetic motor starter. This model is part of Castair's Industrial Series, which is built around all cast iron pumps running at slow RPM for quiet operation and long service life.
The horizontal tank orientation suits shops where ceiling height is limited or where floor layout benefits from a lower profile unit. The factory-mounted starter is the key differentiator of the -S variant — it means the motor starter is already wired and mounted at the factory, saving installation time and ensuring proper specification for this motor and pump combination.
Who This Compressor Is For
- Shops running on single-phase 230V power that need an industrial-grade reciprocating compressor
- Operations that want the convenience of a factory-wired starter rather than sourcing and mounting a separate starter
- Shops where ceiling height or floor layout favors a horizontal tank configuration
- Users stepping up from a consumer or prosumer compressor to a genuine industrial cast iron pump
Industrial Cast Iron Pump Construction
Every Castair industrial pump is built from cast iron — not cast aluminum. This matters for heat dissipation, wear resistance, and rebuildability. The slow RPM design keeps temperatures down and valve wear minimal compared to high-speed pumps that spin at 1,725 RPM or faster.
- All cast iron construction: Cylinder, head, and crankcase are cast iron for long service life
- Slow pump RPM: Runs at low RPM for quiet operation and reduced heat — Castair industrial pumps range from 420 to 995 RPM
- Tapered roller bearings: At both ends of the crankshaft for superior load support and less friction
- Precision steel connecting rods: Automotive-type insert bearings at the crankshaft and bearings at the wrist pin for reliability and long service life
- Disc and spring valves: Easier to service than reed valves, more efficient under load, proven in industrial applications
- 4-ring pistons: Four compression rings per piston for better sealing efficiency and reduced oil carryover
- Centrifugal unloader: The pump starts unloaded every single cycle — no cranking against full head pressure, which significantly reduces motor stress and extends life
Tank, Motor, and Controls
- Tank type: Horizontal ASME-rated tank with channel base for stable floor placement
- Motor: 7 HP single-phase, 1725 RPM industrial motor with full 15% service factor or higher
- Voltage: 230V single-phase
- Mounted starter: Factory-installed magnetic motor starter — saves field installation of a separate starter panel
- ASME safety valve: Factory installed and rated for operating pressure
- Belt guard: Metal, totally enclosed for safety and durability
- Powder-coated finish: ASME tank with powder coat for corrosion resistance
Available Configurations in the 7 HP Single-Phase Lineup
Castair offers the 7 HP single-phase industrial compressor in horizontal and vertical tank configurations with and without the factory starter. Manufacturer specifications for the exact CFM, PSI, RPM, dimensions, and weight for this model were not available on the public product page at time of writing — contact us for confirmed data.
- I713HC1-S (this unit) — 7 HP, 1-phase, horizontal tank, pump C1, with factory-mounted magnetic starter
- I713HC1 — 7 HP, 1-phase, horizontal tank, pump C1, without factory-mounted starter
- I713HC2 — 7 HP, 1-phase, horizontal tank, pump C2 configuration
- I713HC2-2 — 7 HP, 1-phase, horizontal tank, pump C2, variant 2
The 7.5 HP industrial series (I718 models) sits one tier up and offers confirmed published specs from the Castair product page.
When Does a Shop Need This vs. Stepping Up or Down?
Choose the I713HC1-S if: You specifically need a 7 HP single-phase unit with a horizontal tank and want the factory starter included. This is the right choice for shops where the electrician needs a matched starter specification from the factory.
Step up to 7.5 HP (I718HC1-S) if: You want confirmed published specs and slightly more motor headroom with a wider selection of factory options.
Step down if: Your air demand is light — single technician, intermittent use. A smaller Castair commercial garage model may be more cost-effective.
Factory Options Available
- Low Oil Control (#6304M): Automatic shutdown if oil drops too low
- Hour Meter (#HRM75M for 230V): Tracks runtime for maintenance scheduling
- Air Operated Auto Drain (#ADVSM): Removes condensate automatically from the tank
- Electronic Auto Drain (#SDV03M): Timer-based drain valve
- Dual Control (#DC1 for C1): Start/stop and constant speed operating modes
- Intake Noise Silencer (#SA100M for C1): Reduces inlet noise at the pump
- Belt Tensioner (#215DM for 7.5 HP class): Simplifies belt maintenance
- Vibration Pads (#VP1004): Set of four 4x4x1 inch isolation pads
- Right from the Start Kit (#RFS001 for C1): Startup accessories package
- Beltguard Aftercooler (#BGAC1M, 35 CFM): Cools compressed air, reduces moisture in lines
Technical Specifications
- Model: I713HC1-S
- Horsepower: 7 HP
- Phase: Single-phase (1-phase)
- Voltage: 230V
- Tank type: Horizontal (HC)
- Pump configuration: C1
- Starter: Factory-mounted magnetic motor starter included
- CFM, PSI, RPM, dimensions, weight: Manufacturer specifications pending — contact us at 866-217-0063 for confirmed data
Why Buy From Air Compressor Factory Direct?
We are a specialty compressor supplier. When you call us, you get someone who knows the Castair lineup, can confirm the specs that are not on the public product page, and can walk you through whether the -S starter option is right for your electrical setup. We carry the full Castair industrial series, provide free shipping on qualifying orders, and back every sale with manufacturer warranty support and free pre- and post-sale technical support.
Call 866-217-0063 for quick answers and help!
