{"product_id":"castair-d15324hc3-s","title":"Castair D15324HC3-S","description":"\u003cp\u003eThe Castair D15324HC3-S is the top-of-the-line duplex compressor in the Castair lineup — a 30 HP total (2x15 HP) two-stage system running on 3-phase power with a 240-gallon ASME horizontal tank. If your shop runs high sustained CFM demand with significant peak spikes — spray booths running simultaneously, high-volume pneumatic tools, or multiple bays all pulling air at once — the extra 120 gallons of storage over the D15312HC3-S (120-gallon model) means longer recovery intervals and more consistent line pressure during peak loads.\u003c\/p\u003e\n\n\u003cp\u003eThe core system is identical to the D15312HC3-S: two 15 HP two-stage cast iron pumps, C3 pump configuration at 795 RPM, 100.4 CFM at 175 PSI, magnetic starter mounted and wired, duplex alternator standard. The difference is the tank: 240 gallons stores roughly twice the compressed air volume, which translates directly to more usable air between compressor cycles and better pressure stability when demand spikes.\u003c\/p\u003e\n\n\u003cp\u003eCastair has been building these in Spicer, Minnesota since 1991. These are purpose-built commercial systems, not rebranded import machines.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\n\u003ch3\u003ePump Construction — C3 Configuration\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAll Cast Iron Construction:\u003c\/strong\u003e Cast iron cylinders, heads, and crankcase — long service life and quiet operation at 795 RPM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eC3 Pump at 795 RPM:\u003c\/strong\u003e Slowest-running, longest-life pump configuration in the Castair duplex lineup — less heat, less wear, lower noise floor\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTapered Roller Bearings:\u003c\/strong\u003e Both ends of the crankshaft — superior load support and lower friction than ball bearings\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecision Steel Connecting Rods:\u003c\/strong\u003e Automotive-type rod insert bearings at crankshaft and wrist pin — serviceable at standard maintenance intervals\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDisc and Spring Valves:\u003c\/strong\u003e Higher efficiency and easier service than reed valves; straightforward replacement when maintenance is due\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4-Ring Pistons:\u003c\/strong\u003e Better sealing efficiency, reduced oil carry-over into discharge air\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCentrifugal Unloader:\u003c\/strong\u003e Loadless start every time — eliminates the heavy inrush current of loaded starts and reduces motor stress\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTwo-Stage Compression\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTwo-Stage Design:\u003c\/strong\u003e First stage to intermediate pressure, second stage to 175 PSI — more thermally efficient than single-stage at this pressure level\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e175 PSI Maximum Operating Pressure:\u003c\/strong\u003e Covers all standard pneumatic tool and equipment requirements\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCopper Discharge and Unloader Tube or Stainless Steel Braided Flex Line:\u003c\/strong\u003e Factory-selected based on configuration; both handle the discharge temperatures and pressures involved\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTank, Controls, and Electrical\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e240-Gallon ASME Horizontal Tank:\u003c\/strong\u003e Powder-coated steel with channel base supports; ASME certified for pressure vessel safety\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 94\" L x 30\" W x 68\" H — plan your floor space and doorway clearances before ordering; this is a significant installation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eASME Safety Valves:\u003c\/strong\u003e Factory installed on both pump discharge lines\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMagnetic Starter — Mounted and Wired:\u003c\/strong\u003e Factory-installed for the 3-phase motors; includes overload protection and low-voltage release\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDuplex Alternator Control (Standard on C3):\u003c\/strong\u003e Automatically rotates which pump leads each cycle — equalizes run hours and wear between the two units\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMetal Belt Guard — Totally Enclosed:\u003c\/strong\u003e OSHA-compliant drive belt and pulley guarding\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeavy Duty 1725 RPM Industrial Motors:\u003c\/strong\u003e Full 15% service factor or higher — rated for continuous shop duty cycles\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e240-Gallon Tank Advantage\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTwice the Air Storage vs. 120-Gallon:\u003c\/strong\u003e Longer run time between pump cycles when demand is intermittent; better pressure stability when multiple tools spike simultaneously\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLower Duty Cycle on Pumps:\u003c\/strong\u003e More tank volume means the pumps run fewer total hours per unit of air delivered — extends service intervals and pump life in high-demand environments\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBetter Pressure Recovery:\u003c\/strong\u003e After a high-demand event, the larger tank provides more buffer while the pumps bring pressure back up\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eCastair D15324HC3-S duplex compressor (two 15 HP pump-motor assemblies, 240-gallon ASME tank, common skid)\u003c\/li\u003e\n  \u003cli\u003eMagnetic starter — factory mounted and wired\u003c\/li\u003e\n  \u003cli\u003eDuplex alternator control (standard on C3)\u003c\/li\u003e\n  \u003cli\u003eASME safety valves (factory installed)\u003c\/li\u003e\n  \u003cli\u003ePressure gauges and controls\u003c\/li\u003e\n  \u003cli\u003eBelt guards (factory installed)\u003c\/li\u003e\n  \u003cli\u003eOwner's manual and service documentation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eShips on freight. This system weighs 2,355 lbs shipped — confirm site access, forklift or crane availability, and floor load capacity before delivery. Call us to coordinate.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eAvailable Factory-Mounted Options\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Oil Control (#6304x2M):\u003c\/strong\u003e Shuts down the affected pump on low oil — prevents running dry\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHour Meters (#HRM75x2M \/ #HRM460x2M):\u003c\/strong\u003e Individual runtime tracking per pump for accurate service intervals\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eElectronic Auto Drain (#SDV03M):\u003c\/strong\u003e Timed automatic tank drain — critical for moisture management in a 240-gallon tank\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAftercooler (#BGAC2x2M — 100 CFM rated):\u003c\/strong\u003e Cools compressed air before it reaches your distribution system, dramatically reducing moisture\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBelt Tensioner (#254Dx2M — 15 HP):\u003c\/strong\u003e Simplifies belt maintenance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVibration Pads (#VP1004 — set of 4):\u003c\/strong\u003e Reduces floor vibration transmission\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRight From The Start Kit (#RFS003D — 25 and 30 HP):\u003c\/strong\u003e Initial startup service items\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAll Options C3 Package (#AOC3D):\u003c\/strong\u003e All available options bundled\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAvailable Configurations — 30 HP Duplex Options\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eD15312HC3-S — 30 HP (2x15), 3-Phase, 120 gal, 100.4 CFM @ 175 PSI — $13,098.85:\u003c\/strong\u003e Same pump system, smaller tank — right choice if floor space is limited or peak demand spikes are short\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eD15324HC3-S (this unit) — 30 HP (2x15), 3-Phase, 240 gal, 100.4 CFM @ 175 PSI — $14,509.00:\u003c\/strong\u003e Maximum storage for highest-demand environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor lower CFM requirements, step down to the 20 HP (D10312\/D10324) or 15 HP (D7312\/D7324) duplex units — they cover 70 CFM and 49.6 CFM respectively at significantly lower cost.\u003c\/p\u003e\n\n\u003ch2\u003eWhen Does a Shop Need the 240-Gallon vs. the 120-Gallon?\u003c\/h2\u003e\n\u003cp\u003eBoth models deliver identical CFM output — the pumps are the same. The question is whether your shop's demand pattern benefits from more storage:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChoose 240-gallon (D15324HC3-S) when:\u003c\/strong\u003e Multiple spray booths or high-CFM tools run simultaneously and cause pressure drops; you have the floor space; your budget accommodates the ~$1,400 difference; or pump longevity under heavy duty cycles is a priority\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChoose 120-gallon (D15312HC3-S) when:\u003c\/strong\u003e Floor space is tight; your peak demand events are short and spaced far apart; or you want to minimize upfront cost and your usage pattern supports it\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel Number:\u003c\/strong\u003e D15324HC3-S\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e Duplex Series\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHorsepower (each \/ total):\u003c\/strong\u003e 2x15 HP \/ 30 HP total\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eElectrical:\u003c\/strong\u003e 3-Phase\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePump Configuration:\u003c\/strong\u003e C3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePump RPM:\u003c\/strong\u003e 795\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCFM @ 0 PSI:\u003c\/strong\u003e 123.4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCFM @ 175 PSI:\u003c\/strong\u003e 100.4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Pressure:\u003c\/strong\u003e 175 PSI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTank Capacity:\u003c\/strong\u003e 240 gallons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTank Style:\u003c\/strong\u003e ASME horizontal with channel base\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions (L x W x H):\u003c\/strong\u003e 94\" x 30\" x 68\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShipped Weight:\u003c\/strong\u003e 2,355 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\u003eAlternator Control:\u003c\/strong\u003e Standard on C3 configuration\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrice:\u003c\/strong\u003e $14,509.00\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Buy From Air Compressor Factory Direct?\u003c\/h2\u003e\n\u003cp\u003eWe have specialized in professional-grade shop compressors since 2016. At $14,509, this is a capital equipment decision — not something to click-and-ship without talking through your shop's actual requirements. Call us and we will review your CFM demand, electrical service, floor space, and usage pattern. If the 240-gallon tank is overkill for your shop, we will tell you. If you need it, we will explain exactly why.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFree Shipping\u003c\/strong\u003e on qualifying orders (freight delivery; site requirements must be confirmed)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFree Technical Support\u003c\/strong\u003e — 866-217-0063\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull Manufacturer Warranty\u003c\/strong\u003e — Castair stands behind this equipment\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHonest Configuration Guidance\u003c\/strong\u003e — 120 vs. 240 gallon, option packages, electrical requirements\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":53342539350229,"sku":"D15324HC3","price":32405.82,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0622\/8466\/0949\/files\/D15324HC3-S_20WITH_20RDD80.jpg?v=1772675092","url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-d15324hc3-s","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}