{"product_id":"castair-7-5-hp-1ph-rotary-screw-air-compressor-31-cfm-at-100-psi-80-gal-horiz-tank-r718hp75","title":"Castair 7.5 HP 1Ph Rotary Screw Air Compressor 31 Cfm At 100 Psi 80 Gal Horiz Tank R718HP75","description":"\u003ch2\u003eCastair 7.5HP 1-Phase Rotary Screw Air Compressor 80 Gallon Horizontal — R718HP75\u003c\/h2\u003e\n\n\u003cp\u003eThe Castair R718HP75 is a 7.5-horsepower, 1-Phase, 230V, 80-gallon horizontal rotary screw air compressor delivering 31 CFM at 100 PSI. It weighs 555 pounds and measures 64×32×44 inches (L×W×H). If a 5HP rotary screw handles one tech comfortably, the 7.5HP handles two — and still has headroom. At 31 CFM, you can run a 1-inch impact, a DA sander, and a couple of ratchets simultaneously without pressure drop. This is the compressor for a 2-3 bay shop doing production work, a body shop with active spray and sanding going on at the same time, or any operation where the 5HP unit gets close to its limit during busy periods.\u003c\/p\u003e\n\n\u003ch3\u003e31 CFM at 100 PSI — What That Changes in a Shop\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgrade from 5HP:\u003c\/strong\u003e The 5HP rotary screw delivers 20 CFM. The 7.5HP delivers 31 CFM — 55% more output for a modest step up in cost and footprint (same tank size, same physical dimensions).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo-tech coverage:\u003c\/strong\u003e Two techs each running a 1\/2\" impact simultaneously draw 8-16 CFM — well within this unit's output. Add blow guns and an air ratchet and you're still fine.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDA sanding plus spray:\u003c\/strong\u003e A DA sander at 12-20 CFM and an HVLP gun at 9-14 CFM is 21-34 CFM combined. The 7.5HP unit handles this range where the 5HP would start to show pressure drop at the peaks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1-inch impact sustained use:\u003c\/strong\u003e Heavy-duty 1\" impacts can draw 15-25 CFM under load. The 31 CFM output provides real headroom for sustained use — something the 5HP unit can't fully support during extended heavy pulls.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHorizontal Tank — Footprint and Installation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 64×32×44\" (L×W×H) — 555 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame physical size as the 5HP unit:\u003c\/strong\u003e The 7.5HP rotary screw uses the same 80-gallon tank as the 5HP. You get significantly more output in the identical footprint — this is one of the most practical reasons to go 7.5HP if you're choosing between the two.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow 44-inch profile:\u003c\/strong\u003e Horizontal tank suits shops with ceiling height constraints. Fits under most workbench overhangs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e64-inch floor run:\u003c\/strong\u003e Measure available wall space. Horizontal units need 64 inches of clear length plus service clearance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e1-Phase 230V Power\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e230V 1-Phase. Standard 230V single-phase — standard commercial power.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle-phase advantage:\u003c\/strong\u003e No 3-phase service required. Standard 230V single-phase commercial power. A 7.5HP single-phase motor draws more amperage than the 3-phase equivalent — verify your breaker and wire gauge can handle the load.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCastair Build Quality\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e100% duty cycle:\u003c\/strong\u003e 7.5HP rotary screw runs continuously. No piston-style thermal limits, no valve wear from pressure cycling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCast iron construction throughout:\u003c\/strong\u003e All primary components in cast iron — not aluminum. Handles the thermal cycling of sustained production use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial 1725 RPM motor, full 15% service factor:\u003c\/strong\u003e Heavy-duty motor designed for continuous commercial duty.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle solenoid air end control:\u003c\/strong\u003e No computers, no lockout codes, no proprietary systems. Simple, field-repairable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalog pressure and temperature gauges standard:\u003c\/strong\u003e Easy to read, nothing to interpret.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh pressure and dual high temperature shutdown standard:\u003c\/strong\u003e Built-in protection — not an option.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFactory-filled with Cast-Lube synthetic oil:\u003c\/strong\u003e 4,000-hour or one-year change interval.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in air\/oil separator with spin-on filter:\u003c\/strong\u003e Keeps oil out of the air supply.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOff-shelf V-belts with adjustable tensioner:\u003c\/strong\u003e Standard belts from any industrial supply.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir\/oil lines in copper pipe:\u003c\/strong\u003e Heat and vibration resistant, standard fittings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir-cooled aftercooler\/oil cooler standard:\u003c\/strong\u003e Removable for cleaning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHour meter standard:\u003c\/strong\u003e Maintenance scheduling by actual run hours.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10-minute auto shutdown timer:\u003c\/strong\u003e Electricity savings when air demand stops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eASME-rated 80-gallon tank:\u003c\/strong\u003e Code-compliant for commercial installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-wired magnetic starter and controls:\u003c\/strong\u003e Connect incoming 230V power and run.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure options:\u003c\/strong\u003e 135 PSI standard, 150 or 175 PSI available.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e2-year warranty on air end, electric motor, and tank\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eMade in Spicer, Minnesota\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAvailable Configurations — 7.5HP Rotary Screw Lineup\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eR718HP75:\u003c\/strong\u003e 7.5HP, 1-Phase 230V, 80 Gal Horizontal — 31 CFM @ 100 PSI — 64×32×44\" — 555 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR718VP75:\u003c\/strong\u003e 7.5HP, 1-Phase 230V, 80 Gal Vertical — 31 CFM @ 100 PSI — 34×26×70\" — 555 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR718HG11:\u003c\/strong\u003e 7.5HP, 1-Phase, 80 Gal Horizontal, G11 air end\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR718VG11:\u003c\/strong\u003e 7.5HP, 1-Phase, 80 Gal Vertical, G11 air end\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR738HP75:\u003c\/strong\u003e 7.5HP, 3-Phase 230V, 80 Gal Horizontal — 31 CFM @ 100 PSI — 64×32×44\" — 546 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR738VP75:\u003c\/strong\u003e 7.5HP, 3-Phase 230V, 80 Gal Vertical — 31 CFM @ 100 PSI — 34×26×70\" — 546 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR738HG11:\u003c\/strong\u003e 7.5HP, 3-Phase, 80 Gal Horizontal, G11 air end, 230 or 460V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep down:\u003c\/strong\u003e R518HP75\/VP75 — 5HP, 20 CFM @ 100 PSI — same tank, less output, lower cost\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep up — 10HP+:\u003c\/strong\u003e Call for pricing and availability on 10HP and above\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhen Does a Shop Need This vs. Stepping Up or Down?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRight for:\u003c\/strong\u003e 2-3 bay shop, two techs running air tools regularly, body shop with simultaneous sanding and painting, transmission shop with heavy impact use. The 31 CFM @ 100 PSI covers multi-tech simultaneous use without pressure drop.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep down to 5HP (R518HP75\/VP75) if:\u003c\/strong\u003e You primarily have one tech working at a time and your demand is genuinely intermittent. The 20 CFM output is adequate, and you save on purchase cost — same physical size, same tank.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep up to 10HP if:\u003c\/strong\u003e You're running three or more techs simultaneously with heavy air tool loads, or if you run continuous high-demand equipment like large spray booths or pneumatic lifts. Call for pricing on 10HP and above.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhase choice:\u003c\/strong\u003e If 3-phase is available, use it (R738HP75\/VP75). Lower amp draw, smoother starts, simpler motor construction. Single-phase (R718HP75\/VP75) is for shops without 3-phase service.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eG11 vs. P75 air end:\u003c\/strong\u003e Same output, different screw element. PM kit and filters differ. Confirm which you're ordering before buying maintenance supplies.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e R718HP75\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 1-Phase\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 230V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTank:\u003c\/strong\u003e 80 gallon, horizontal, ASME-rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir End:\u003c\/strong\u003e P75\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCFM @ 100 PSI:\u003c\/strong\u003e 31\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (L×W×H):\u003c\/strong\u003e 64×32×44\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 555 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompressor Type:\u003c\/strong\u003e Rotary screw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDuty Cycle:\u003c\/strong\u003e 100%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Pressure:\u003c\/strong\u003e 135 PSI (150 or 175 PSI optional)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor Speed:\u003c\/strong\u003e 1725 RPM industrial, full 15% service factor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive:\u003c\/strong\u003e Belt drive, off-shelf V-belts with adjustable tensioner\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLubrication:\u003c\/strong\u003e Oil-injected, Cast-Lube synthetic, 4,000-hour\/1-year interval\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControls:\u003c\/strong\u003e Single solenoid, pre-wired magnetic starter, analog gauges, hour meter, 10-minute auto shutdown\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShutdowns:\u003c\/strong\u003e High pressure, dual high temperature (standard)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaintenance Kit:\u003c\/strong\u003e MKP75\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 2-year on air end, electric motor, and tank\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Castair, Inc. (Spicer, Minnesota)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCastair rotary screw compressor (P75 air end) mounted on 80-gallon horizontal ASME tank\u003c\/li\u003e\n\u003cli\u003ePre-wired magnetic starter and controls for 230V 1-Phase\u003c\/li\u003e\n\u003cli\u003eAir\/oil separator with spin-on filter\u003c\/li\u003e\n\u003cli\u003eAir-cooled aftercooler\/oil cooler\u003c\/li\u003e\n\u003cli\u003eHour meter\u003c\/li\u003e\n\u003cli\u003ePre-filled with Cast-Lube synthetic oil\u003c\/li\u003e\n\u003cli\u003eAnalog pressure and temperature gauges installed\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRecommended Accessories\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreventative Maintenance Kit (MKP75):\u003c\/strong\u003e 2 air filters, 4 oil filters, 1 separator filter, 5 gallons Cast-Lube oil — 10% savings over individual purchase\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuto Tank Drain SDV03M:\u003c\/strong\u003e Automatic condensate purging — essential for humid climates or high-cycle use\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVibration Pads VP1004:\u003c\/strong\u003e 4\"×4\"×1\" set of 4 — reduces vibration transmission to floor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBall Valve BV75 (3\/4\") or BV100 (1\"):\u003c\/strong\u003e Full-flow outlet shutoff — use 1\" for 7.5HP and above\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMetal Flex Hose VA075 (3\/4\" NPT × 18\") or VA100 (1\"):\u003c\/strong\u003e Vibration isolation between tank and shop plumbing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Buy From Air Compressor Factory Direct?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCastair specialist:\u003c\/strong\u003e We know the 7.5HP lineup — phase options, air end variants, and the accessories that go with each configuration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e on qualifying orders\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree technical support:\u003c\/strong\u003e Call 866-217-0063 — we'll help you confirm 5HP vs. 7.5HP, phase requirement, and tank orientation before you order\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull manufacturer warranty\u003c\/strong\u003e honored and supported\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHonest sizing advice:\u003c\/strong\u003e If a 5HP unit handles your actual demand, we'll tell you. If you're running two bays hard and the 7.5HP is what you need, we'll confirm that too\u003c\/li\u003e\n\u003c\/ul\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":53342583292117,"sku":"R718HP75","price":19387.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0622\/8466\/0949\/files\/Logo1_d836d092-14a7-4afd-bd81-f3678b05cca6.webp?v=1772652846","url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-7-5-hp-1ph-rotary-screw-air-compressor-31-cfm-at-100-psi-80-gal-horiz-tank-r718hp75","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}