{"product_id":"castair-i738hc1-s","title":"Castair I738HC1-S","description":"\u003cp\u003eThe Castair I738HC1 is a 7.5 HP, 3-phase industrial air compressor on an 80-gallon horizontal ASME tank — identical to the I738HC1-S except the magnetic motor starter is not included. This is the right choice for shops that have an existing motor control panel, a machine control center that will handle the overload protection, or an electrician who will source and mount the starter separately. The compressor itself — C1 pump, motor, 80-gallon horizontal tank, belt drive — is the same as the -S version.\u003c\/p\u003e\n\n\u003cp\u003eOutput is 32.4 CFM at 0 PSI and 24.8 CFM at 175 PSI from the C1 pump running at 895 RPM. Dimensions are 64x20x48 inches, shipped weight 625 lbs. If you need a factory-mounted starter, order the I738HC1-S instead.\u003c\/p\u003e\n\n\u003ch2\u003eStarter vs. No Starter — What You're Deciding\u003c\/h2\u003e\n\u003cp\u003e3-phase motors require overload protection — a magnetic motor starter. When you buy the I738HC1 without the -S suffix, you are responsible for sourcing and mounting the starter. For this unit at 208\/230V 3-phase, the appropriate Castair starter is the S72 with B36 heaters. At 460V, it's the S74 with B22 heaters. Your electrician can also use an equivalent-rated starter from another manufacturer. Call us if you need help specifying the right starter for your service voltage.\u003c\/p\u003e\n\n\u003ch3\u003ePump Features — Cast Iron C1 Two-Stage\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll cast iron construction:\u003c\/strong\u003e Cylinders, heads, and crankcase — cast iron throughout, not aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSlow 895 RPM operation:\u003c\/strong\u003e Belt-drive reduction from the 1,725 RPM motor keeps heat low and pump life long\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTapered roller bearings at both crankshaft ends:\u003c\/strong\u003e Handles radial and thrust loads better than ball bearings under continuous service\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision steel connecting rods:\u003c\/strong\u003e Automotive-type rod insert bearings at crankshaft, needle bearings at wrist pin\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisc and spring valves:\u003c\/strong\u003e Easy to service, reliable under sustained pressure cycling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-ring pistons:\u003c\/strong\u003e Reduced oil carry-over into the discharge air\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCentrifugal unloader:\u003c\/strong\u003e No-load start on every cycle — head pressure releases before the motor cranks up\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTank and Frame Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e80-gallon horizontal ASME-rated tank:\u003c\/strong\u003e Powder coated, channel-supported base for stable floor installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eASME safety valve:\u003c\/strong\u003e Factory installed, rated for working pressure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMetal belt guard:\u003c\/strong\u003e Fully enclosed — not a plastic clip-on\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCopper discharge and unloader tube:\u003c\/strong\u003e Better heat dissipation than rubber or plastic lines\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eMotor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1,725 RPM heavy-duty industrial motor:\u003c\/strong\u003e Full 15% service factor — continuous duty rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-phase:\u003c\/strong\u003e Requires magnetic motor starter for overload protection (not included — see -S version for factory-mounted starter)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCastair I738HC1 compressor assembly (C1 pump, motor, 80-gal horizontal tank, belt drive, belt guard)\u003c\/li\u003e\n\u003cli\u003eASME safety valve (installed)\u003c\/li\u003e\n\u003cli\u003eCopper discharge and unloader tube (installed)\u003c\/li\u003e\n\u003cli\u003ePressure switch (installed)\u003c\/li\u003e\n\u003cli\u003e\u003cem\u003eMagnetic motor starter not included — order I738HC1-S for the starter-included version\u003c\/em\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAvailable Configurations — 7.5HP 3-Phase Industrial Lineup\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eI738HC1-S:\u003c\/strong\u003e 7.5HP, 3-phase, 80-gal horizontal, C1 pump, 895 RPM, 24.8 CFM@175PSI, 64x20x48 in., 625 lbs, magnetic starter included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eI738HC1:\u003c\/strong\u003e Same as above without factory-mounted magnetic starter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eI738HC2-S:\u003c\/strong\u003e 7.5HP, 3-phase, 80-gal horizontal, C2 pump, 585 RPM, 28.1 CFM@175PSI, 64x20x46 in., 730 lbs, magnetic starter included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eI738HC2:\u003c\/strong\u003e Same as above without factory-mounted magnetic starter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eI738VC1-S:\u003c\/strong\u003e 7.5HP, 3-phase, 80-gal vertical, C1 pump, 895 RPM, 24.8 CFM@175PSI, 32x24x74 in., 625 lbs, magnetic starter included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eI738VC1:\u003c\/strong\u003e Same as above without factory-mounted magnetic starter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eI738VC2-S:\u003c\/strong\u003e 7.5HP, 3-phase, 80-gal vertical, C2 pump, 585 RPM, 28.1 CFM@175PSI, 40x24x74 in., 730 lbs, magnetic starter included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eI738VC2:\u003c\/strong\u003e Same as above without factory-mounted magnetic starter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eI7312HC2-S:\u003c\/strong\u003e 7.5HP, 3-phase, 120-gal horizontal, C2 pump — maximum reserve for high-demand shops\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhen Does a Shop Need This vs. Stepping Up or Down\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThe I738HC1-S is right for your shop if:\u003c\/strong\u003e You have 3-phase power, your shop runs general automotive service — impacts, ratchets, tire equipment, blow guns — and you want an 80-gallon reserve so the compressor isn't cycling constantly throughout the day. The 24.8 CFM at 175 PSI handles two to three air tools simultaneously without starving them.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eStep up to I738HC2-S\u003c\/strong\u003e if you need more CFM — 28.1 vs. 24.8 at 175 PSI. The C2 pump's extra output matters when you're running DA sanders, spray guns, air chisels, or multiple bays simultaneously. The C2 also runs at a lower 585 RPM, which is quieter and produces less heat per hour of operation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eStep up to I7312HC2-S\u003c\/strong\u003e (120-gallon) if your shop runs sustained operations like production spray painting, sandblasting, or line work where the compressor needs maximum reserve to prevent short-cycling on heavy tools.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eConsider I738VC1-S\u003c\/strong\u003e if your floor space is tighter and you can use vertical height instead of horizontal floor area.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e I738HC1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHorsepower:\u003c\/strong\u003e 7.5 HP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhase:\u003c\/strong\u003e 3-phase\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTank Capacity:\u003c\/strong\u003e 80 gallons\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTank Type:\u003c\/strong\u003e Horizontal, ASME-rated, powder coated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTank Dimensions:\u003c\/strong\u003e 64 x 20 x 48 in. (L x W x H)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShipping Weight:\u003c\/strong\u003e 625 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePump Model:\u003c\/strong\u003e C1 (two-stage, cast iron, inline-2)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePump RPM:\u003c\/strong\u003e 895\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCFM @ 0 PSI:\u003c\/strong\u003e 32.4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCFM @ 175 PSI:\u003c\/strong\u003e 24.8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Working Pressure:\u003c\/strong\u003e 175 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor Speed:\u003c\/strong\u003e 1,725 RPM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStarter:\u003c\/strong\u003e Not included (see I738HC1-S for starter-included version)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Starter (208\/230V):\u003c\/strong\u003e S72 with B36 heaters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Starter (460V):\u003c\/strong\u003e S74 with B22 heaters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDischarge Tube:\u003c\/strong\u003e Copper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBelt Guard:\u003c\/strong\u003e Metal, fully enclosed\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Buy From Air Compressor Factory Direct?\u003c\/h3\u003e\n\u003cp\u003eWe specialize in industrial and commercial air compressors and have been at it since 2016. When you call, you're talking to someone who knows the Castair lineup, can tell you whether the C1 or C2 pump fits your shop's CFM requirements, and can help you decide between horizontal and vertical tank configurations for your space. Free shipping, free technical support at 866-217-0063, full Castair manufacturer warranty. Call us before you buy if you have questions about which configuration is right for your shop.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCall 866-217-0063 for quick answers and help!\u003c\/strong\u003e\u003c\/p\u003e","brand":"Cast Air","offers":[{"title":"Default Title","offer_id":53342569267413,"sku":"I738HC1","price":7108.52,"currency_code":"USD","in_stock":true}],"url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-i738hc1-s","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}