{"product_id":"castair-d10312hc3-s","title":"Castair D10312HC3-S","description":"\u003cp\u003eThe Castair D10312HC3-S is a 20 total horsepower duplex two-stage air compressor on a 120-gallon horizontal ASME tank, wired for three-phase electricity, running the HC3 pump at 570 RPM. It delivers 70 CFM at 175 PSI combined from two 10 HP cast iron pumps, weighs 1,740 lbs, and measures 94\" x 28\" x 57\". The HC3 pump's 570 RPM speed is the defining difference from the HC2 version — slower RPM means lower operating temperatures, quieter operation, and longer pump life, in a frame that is 9\" longer to accommodate the larger displacement cylinders.\u003c\/p\u003e\n\n\u003ch2\u003eThree-Phase + HC3 Pump: The Production Floor Choice\u003c\/h2\u003e\n\u003cp\u003eThe D10312HC3-S combines two advantages:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree-phase power\u003c\/strong\u003e — cooler, more efficient motor operation, smoother starts, longer motor life compared to single-phase at the same HP rating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHC3 pump at 570 RPM\u003c\/strong\u003e — lower heat generation, extended valve and ring life, quieter operation than the HC2 at 758 RPM\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor a shop that runs the compressor at high utilization — multiple shifts, continuous spray operations, heavy pneumatic tool use — this combination is the right long-term choice even though it costs more upfront than the HC2 version.\u003c\/p\u003e\n\n\u003ch3\u003ePump and Motor Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Duplex (two pumps, two motors)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal HP:\u003c\/strong\u003e 20 HP (2 x 10 HP)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhase:\u003c\/strong\u003e Three-phase\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePump RPM:\u003c\/strong\u003e 570 (HC3 pump)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCFM at 0 PSI:\u003c\/strong\u003e 90 CFM combined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCFM at 175 PSI:\u003c\/strong\u003e 70 CFM combined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Pressure:\u003c\/strong\u003e 175 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage:\u003c\/strong\u003e Two-stage\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTank and Physical Specs\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTank Capacity:\u003c\/strong\u003e 120 gallons, horizontal ASME\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (LxWxH):\u003c\/strong\u003e 94\" x 28\" x 57\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1,740 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTank Finish:\u003c\/strong\u003e Powder coated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety Valve:\u003c\/strong\u003e ASME rated, installed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnetic Starter:\u003c\/strong\u003e Mounted and wired (factory installed)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCast Iron Pump Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll cast iron construction\u003c\/strong\u003e for long life and quiet operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHC3 pump at 570 RPM\u003c\/strong\u003e — slowest pump in the 120gal duplex lineup for this HP class\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTapered roller bearings\u003c\/strong\u003e at both ends of crankshaft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision steel connecting rods\u003c\/strong\u003e with automotive-type rod insert bearings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisc and spring valves\u003c\/strong\u003e for service and reliability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-ring pistons\u003c\/strong\u003e for efficiency and reduced oil carry-over\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCentrifugal unloader\u003c\/strong\u003e for loadless starts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eThree-Phase 2x10HP Duplex Comparison\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eD10312HC2-S\u003c\/strong\u003e — 3-phase, 120gal, HC2 758 RPM, 85x28x57, 1,410 lbs — lighter, shorter frame\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eD10312HC3-S\u003c\/strong\u003e — 3-phase, 120gal, HC3 570 RPM, 94x28x57, 1,740 lbs — slower pump (this unit)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eD10324HC2-S\u003c\/strong\u003e — 3-phase, 240gal, HC2 758 RPM, 1,760 lbs — larger tank\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eD10324HC3-S\u003c\/strong\u003e — 3-phase, 240gal, HC3 570 RPM, 2,190 lbs — maximum configuration\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhen Does a Shop Need This\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eChoose the D10312HC3-S when:\u003c\/strong\u003e You have three-phase service, run the machine at high utilization (extended daily hours, continuous processes), care about noise level in the shop, and the 120-gallon tank provides adequate storage between cycles.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStep up to D10324HC3-S\u003c\/strong\u003e if spray painting, sandblasting, or other continuous high-draw processes exhaust 120 gallons faster than the pumps can replenish — the 240-gallon version eliminates pressure sag during peak demand.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStep down to D10312HC2-S\u003c\/strong\u003e if the 330 lbs weight difference and 9\" frame length difference matter for your installation, and if noise\/temperature are not primary concerns.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e D10312HC3-S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Castair (Cast Air, Inc.) — Spicer, Minnesota\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal HP:\u003c\/strong\u003e 20 HP (2 x 10 HP)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhase:\u003c\/strong\u003e Three-phase\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePump RPM:\u003c\/strong\u003e 570 (HC3)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCFM @ 0 PSI:\u003c\/strong\u003e 90\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCFM @ 175 PSI:\u003c\/strong\u003e 70\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTank:\u003c\/strong\u003e 120 gallon, horizontal, ASME, powder coated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (LxWxH):\u003c\/strong\u003e 94\" x 28\" x 57\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1,740 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnetic Starter:\u003c\/strong\u003e Included, factory mounted and wired\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety Valve:\u003c\/strong\u003e ASME rated, installed\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Buy From Air Compressor Factory Direct?\u003c\/h3\u003e\n\u003cp\u003eWe have been selling Cast Air industrial and duplex compressors since 2016. We can help you compare the HC2 vs. HC3 pump and evaluate whether 120 or 240 gallons suits your shop's peak demand. Free shipping, free technical support at 866-217-0063, and the full Castair manufacturer warranty.\u003c\/p\u003e\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":53342537810133,"sku":"D10312HC3","price":24184.02,"currency_code":"USD","in_stock":true}],"url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-d10312hc3-s","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}