{"product_id":"castair-73hp-3-phase-rotary-screw-air-compressor-horizontal-230v-r738hp75-230","title":"Castair 73HP 3-Phase Rotary Screw Air Compressor  Horizontal 230V - R738HP75-230","description":"\u003ch2\u003eCastair 7.5 HP 3-Phase Rotary Screw Air Compressor — Horizontal Tank, 230V (R738HP75-230)\u003c\/h2\u003e\n\n\u003cp\u003eThe Castair R738HP75-230 is a 7.5 HP, 3-phase, 100% duty cycle rotary screw air compressor mounted on an 80-gallon horizontal ASME tank, wired for 230V. If you are running a busy auto shop, body shop, or light industrial operation and you are tired of a piston compressor cycling on and off all day, this is the class of machine you step up to. Rotary screw compressors run continuously without heat cycling. The R738HP75-230 delivers 31 CFM at 100 PSI around the clock. The 80-gallon horizontal tank keeps your floor footprint manageable at 64 x 32 x 44 inches while giving you buffer capacity for tools that pulse demand. Standard pressure is 135 PSI, with factory options for 150 or 175 PSI.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Rotary Screw vs. Piston at 7.5 HP?\u003c\/h2\u003e\n\u003cp\u003eA 7.5 HP piston compressor is rated for 50 to 60 percent duty cycle at best. Run a spray gun, a continuous grinder, or multiple air tools simultaneously and you will hear that piston motor cycling constantly, running hot, and wearing out faster. The R738HP75-230 is rated for 100% duty cycle — full continuous operation. It produces 31 CFM at 100 PSI without stopping. The air end runs on a heavy-duty industrial 1725 RPM motor, and the entire system is built around off-the-shelf components so your local supplier can source parts without waiting on proprietary orders.\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 full 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 — tension without removing belt guards\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLubrication:\u003c\/strong\u003e Factory-filled with 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 oil filter\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAir filter:\u003c\/strong\u003e Automotive-style paper element air filter\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 operates the air end — no PLC or computer logic involved\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGauges:\u003c\/strong\u003e Easy-read pressure and temperature gauges 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 — shuts down automatically when air demand stops, cuts electricity cost\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo lockout codes:\u003c\/strong\u003e Unlike many competing brands, this unit will not lock you out and require a dealer reset\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 configuration\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTank certification:\u003c\/strong\u003e USA-made ASME-certified steel tank\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAir\/oil separator:\u003c\/strong\u003e Built-in with spin-on filter element\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAftercooler:\u003c\/strong\u003e Air-cooled aftercooler and oil cooler standard — easily removed for cleaning\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlumbing:\u003c\/strong\u003e Off-shelf copper piping for all air\/oil lines — field-serviceable anywhere\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 230V, 3-phase\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStarter:\u003c\/strong\u003e Name-brand magnetic starter and controls, factory mounted and wired — connect incoming power and run\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e460V option:\u003c\/strong\u003e Same machine available as R738HP75-460 for 460V 3-phase service\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 — makes scheduling oil changes and filter replacements straightforward\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOil changes:\u003c\/strong\u003e Spin-on oil filter, spin-on air\/oil separator filter — no special tools needed\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBelt service:\u003c\/strong\u003e Off-shelf V-belts with adjustable tensioner — quick to replace in the field\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAftercooler cleaning:\u003c\/strong\u003e Easily removed without major disassembly\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePM kit:\u003c\/strong\u003e MKD3-4 kit covers D3, D31, and D4 air ends (5-10 HP range) — includes 2 air filters, 4 oil filters, 1 separator filter, 5 gallons synthetic oil, saves 10% vs. individual purchases\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat Is in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eCastair R738HP75-230 rotary screw compressor unit, fully assembled\u003c\/li\u003e\n  \u003cli\u003e80-gallon horizontal ASME tank (USA-made)\u003c\/li\u003e\n  \u003cli\u003eAir-cooled aftercooler and oil cooler\u003c\/li\u003e\n  \u003cli\u003eMagnetic starter and controls, factory wired\u003c\/li\u003e\n  \u003cli\u003eHour meter\u003c\/li\u003e\n  \u003cli\u003ePressure and temperature gauges\u003c\/li\u003e\n  \u003cli\u003eFactory fill of CAST-LUBE 4,000-hour synthetic oil\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eVibration pads (VP1004, set of 4), ball valve, and metal flex hose are recommended accessories — available factory-mounted or sold separately.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eAvailable Configurations and Upgrade Path\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eR538HP75\u003c\/strong\u003e — 5 HP, 3-phase, 80 gal horizontal, 20 CFM, 64x32x44, 470 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eR738HP75-230 (this unit)\u003c\/strong\u003e — 7.5 HP, 3-phase, 230V, 80 gal horizontal, 31 CFM, 64x32x44, 546 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eR738HP75-460\u003c\/strong\u003e — Same as above, 460V 3-phase\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eR738VP75-230\u003c\/strong\u003e — Same 7.5 HP specs, vertical tank, 34x26x70, 546 lbs — smaller floor footprint\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eR1038HP75\u003c\/strong\u003e — 10 HP, 3-phase, 80 gal horizontal, 40 CFM, 64x32x44, 585 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eR15312HP75\u003c\/strong\u003e — 15 HP, 3-phase, 120 gal horizontal, 52 CFM, 69x33x55, 765 lbs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePressure options available at order: 135 PSI (standard), 150 PSI, or 175 PSI.\u003c\/p\u003e\n\n\u003ch2\u003eWhen Does a Shop Need This vs. Stepping Up or Down?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThis machine fits your shop if:\u003c\/strong\u003e You have 3-phase 230V service, need continuous CFM for 2-3 simultaneous air tools (impacts, ratchets, HVLP guns), and want the horizontal layout for low-ceiling or space-constrained bays. The 31 CFM at 100 PSI handles most mid-size shop workflows without bottlenecking.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStep up to 10 HP (R1038HP75) if:\u003c\/strong\u003e You are running more than three continuous air tools, a large spray booth, or a tire shop with back-to-back impact use. The 10 HP delivers 40 CFM at 100 PSI.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStep down to 5 HP (R538HP75) if:\u003c\/strong\u003e You are a smaller single-tech shop with intermittent tool use — 20 CFM handles one-lift shops comfortably.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVerify your power supply first:\u003c\/strong\u003e This is a 3-phase 230V unit. Single-phase shops should look at the R718HP75. Shops with 460V 3-phase service should order the R738HP75-460.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e R738HP75-230\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 230V (460V available as R738HP75-460)\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 We carry the full line — compressors, dryers, filters, and parts\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 Call 866-217-0063 — talk to someone who knows rotary screw compressors\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull manufacturer warranty:\u003c\/strong\u003e 2-year warranty on air end, motor, and tank, honored without hassle\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHonest sizing guidance:\u003c\/strong\u003e If 7.5 HP is not the right size for your shop, we will tell you\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":53342583488725,"sku":"R738HP75-230","price":18648.86,"currency_code":"USD","in_stock":true}],"url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-73hp-3-phase-rotary-screw-air-compressor-horizontal-230v-r738hp75-230","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}