{"product_id":"castair-75-hp-3phase-rotary-screw-air-compressor-31-cfm-at-100-psi-80-gal-horiz-tank-230-460-r738hp75","title":"Castair 75 HP 3Phase Rotary Screw Air Compressor 31 Cfm At 100 Psi 80 Gal Horiz Tank 230-460 R738HP75","description":"\u003ch2\u003eCastair 7.5 HP 3-Phase Rotary Screw Air Compressor — Horizontal Tank, 230\/460V (R738HP75-460)\u003c\/h2\u003e\n\n\u003cp\u003eThe Castair R738HP75-460 is the 460V 3-phase version of the R738HP75 rotary screw compressor — same 7.5 HP air end, same 80-gallon horizontal ASME tank, same 31 CFM at 100 PSI output, wired from the factory for 460V 3-phase service. If your facility runs 460V 3-phase (common in industrial buildings, larger body shops, and manufacturing facilities), this is the correct model to order. Running a 230V unit on 460V service — even through a transformer — is not recommended. Order the right voltage from the start.\u003c\/p\u003e\n\n\u003cp\u003eManufacturer specifications pending confirmation on the 230\/460V dual-rating in the product name. Based on Castair catalog data, the R738HP75 series is 230V standard with 460V available as a factory option. Contact us at 866-217-0063 to confirm your exact voltage configuration before ordering.\u003c\/p\u003e\n\n\u003ch2\u003eSame Machine, Right Voltage\u003c\/h2\u003e\n\u003cp\u003eEverything about the R738HP75-460 is identical to the R738HP75-230 except the electrical configuration. The 460V wiring allows the motor to draw half the amperage at twice the voltage compared to the 230V version — this means smaller wire runs, smaller breakers, and lower I2R losses over longer runs from your panel to the compressor. In shops where the compressor is 50+ feet from the panel, 460V is often the better choice even when both voltages are available.\u003c\/p\u003e\n\n\u003ch3\u003eAir End and Drive System\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDuty cycle:\u003c\/strong\u003e 100% — continuous operation rated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAir end:\u003c\/strong\u003e Rotary screw, single solenoid control — no computers, no lockout codes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMotor:\u003c\/strong\u003e Heavy-duty industrial 1725 RPM with 15% service factor or higher\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrive:\u003c\/strong\u003e Off-shelf V-belts with adjustable belt tightener\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLubrication:\u003c\/strong\u003e Factory-filled 4,000-hour \/ 1-year synthetic CAST-LUBE oil\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOil filter:\u003c\/strong\u003e Spin-on automotive-type\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAir filter:\u003c\/strong\u003e Automotive-style paper element\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eControls and Safety\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePressure control:\u003c\/strong\u003e Single solenoid, no PLC or computer\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGauges:\u003c\/strong\u003e Pressure and temperature gauges, easy-read standard\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh pressure shutdown:\u003c\/strong\u003e Standard\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual high temperature shutdown:\u003c\/strong\u003e Standard\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e10-minute shutdown timer:\u003c\/strong\u003e Standard — saves electricity when air demand drops\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo lockout codes:\u003c\/strong\u003e Field-serviceable without dealer involvement\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTank and Cooling\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTank capacity:\u003c\/strong\u003e 80 gallons, horizontal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTank certification:\u003c\/strong\u003e ASME (USA-made)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAir\/oil separator:\u003c\/strong\u003e Built-in with spin-on filter\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAftercooler:\u003c\/strong\u003e Air-cooled aftercooler and oil cooler, removable for cleaning\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlumbing:\u003c\/strong\u003e Off-shelf copper piping throughout\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eElectrical\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 460V, 3-phase (230V version: R738HP75-230)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStarter:\u003c\/strong\u003e Name-brand magnetic starter, factory mounted and wired — connect power and run\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eMaintenance\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHour meter:\u003c\/strong\u003e Standard for maintenance scheduling\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOil changes:\u003c\/strong\u003e Spin-on oil and separator filters — no special tools\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBelt service:\u003c\/strong\u003e Off-shelf V-belts, adjustable tensioner\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePM kit:\u003c\/strong\u003e MKD3-4 (D3, D31, D4 air ends, 5-10 HP range) — 10% savings vs. individual items\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat Is in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eCastair R738HP75-460 rotary screw compressor, fully assembled\u003c\/li\u003e\n  \u003cli\u003e80-gallon horizontal ASME tank\u003c\/li\u003e\n  \u003cli\u003eAir-cooled aftercooler and oil cooler\u003c\/li\u003e\n  \u003cli\u003eMagnetic starter and controls, factory wired for 460V\u003c\/li\u003e\n  \u003cli\u003eHour meter\u003c\/li\u003e\n  \u003cli\u003ePressure and temperature gauges\u003c\/li\u003e\n  \u003cli\u003eFactory fill CAST-LUBE synthetic oil\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eVibration pads, ball valve, and flex hose available as factory-mounted options or separately.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eAvailable Configurations\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eR738HP75-230\u003c\/strong\u003e — Same unit, 230V 3-phase\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eR738HP75-460 (this unit)\u003c\/strong\u003e — 460V 3-phase, 80 gal horizontal, 31 CFM, 64x32x44, 546 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eR738VP75-460\u003c\/strong\u003e — Same specs, vertical tank, 34x26x70, 546 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eR1038HP75\u003c\/strong\u003e — 10 HP, 80 gal horizontal, 40 CFM at 100 PSI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eR15312HP75\u003c\/strong\u003e — 15 HP, 120 gal horizontal, 52 CFM\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\u003eOrder this model if:\u003c\/strong\u003e Your facility has 460V 3-phase service and you need a mid-size rotary screw compressor with horizontal layout. The 460V wiring reduces wire gauge requirements on long runs from your electrical panel and is standard in many industrial facilities.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStep up to R1038HP75 if:\u003c\/strong\u003e You need more than 31 CFM — three or more heavy air tools running simultaneously.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStep down to R538HP75 if:\u003c\/strong\u003e Your air demand is under 20 CFM consistently.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eChoose 230V instead if:\u003c\/strong\u003e Your facility is wired for 230V 3-phase — do not assume a transformer will work cleanly with the motor starter on this unit. Order the correct voltage.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e R738HP75-460\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\u003eVoltage:\u003c\/strong\u003e 460V (230V available as R738HP75-230)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCFM @ 100 PSI:\u003c\/strong\u003e 31\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard operating pressure:\u003c\/strong\u003e 135 PSI (150 or 175 PSI available)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDuty cycle:\u003c\/strong\u003e 100%\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTank size:\u003c\/strong\u003e 80 gallons, horizontal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTank certification:\u003c\/strong\u003e ASME (USA-made)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions (LxWxH):\u003c\/strong\u003e 64\" x 32\" x 44\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 546 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMotor speed:\u003c\/strong\u003e 1725 RPM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMotor service factor:\u003c\/strong\u003e 15% or higher\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOil:\u003c\/strong\u003e CAST-LUBE synthetic, 4,000-hour \/ 1-year service interval\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 2 years on air end, electric motor, and tank\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 specialists:\u003c\/strong\u003e Full lineup, full parts support\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e to commercial addresses\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFree tech support:\u003c\/strong\u003e 866-217-0063 — real answers on voltage, sizing, and installation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull 2-year warranty\u003c\/strong\u003e on air end, motor, and tank\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHonest guidance:\u003c\/strong\u003e Call us if you are unsure whether 230V or 460V is right for your shop\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":53342583521493,"sku":"R738HP75-460","price":19016.64,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0622\/8466\/0949\/files\/Logo1_9a0456b3-22af-4641-8136-a94809f0ab57.webp?v=1772652850","url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-75-hp-3phase-rotary-screw-air-compressor-31-cfm-at-100-psi-80-gal-horiz-tank-230-460-r738hp75","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}