{"product_id":"castair-d5324hc2-s","title":"Castair D5324HC2-S","description":"\u003cp\u003eThe Castair D5324HC2-S is a 10HP (2×5HP) three-phase duplex air compressor on a 240-gallon horizontal ASME tank with twin C2 cast iron pumps running at 420 RPM. If your shop runs three-phase power and you need a true backup system — so a pump failure never stops production — this is the configuration that delivers it. Two completely independent compressor units share one tank, alternating loads to extend pump life and providing automatic failover if one side goes down.\u003c\/p\u003e\n\n\u003cp\u003eThis is not a light-duty compressor dressed up in heavy-duty language. The C2 pump series runs at 420 RPM — slow by design — so heat stays low, oil carry-over stays minimal, and the pumps outlast their faster-running counterparts by a wide margin. The 240-gallon tank gives your shop serious air storage capacity to absorb peak demand without constant cycling. At 1,620 lbs., this unit is built to stay put on a concrete floor for decades.\u003c\/p\u003e\n\n\u003ch2\u003eWho Needs the D5324HC2-S\u003c\/h2\u003e\n\u003cp\u003eThis compressor is for shops that cannot afford downtime. Auto body and paint shops, production facilities, tire service operations, and any commercial shop running three-phase power that needs a compressor to be running when they arrive in the morning and still running when they leave. The duplex design means one pump can be down for service and the shop keeps operating.\u003c\/p\u003e\n\n\u003cp\u003eAt 35 CFM delivered at 175 PSI, this unit handles multiple air tools running simultaneously — impact guns, grinders, blow guns, sand blasters, paint guns — without the pressure drop that comes from undersized equipment. If your shop regularly runs two or more technicians on air tools at the same time, a single 5HP unit is not going to cut it. This one will.\u003c\/p\u003e\n\n\u003ch2\u003eCastair C2 Pump Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll cast iron construction:\u003c\/strong\u003e Pump cylinders, crankcase, and valve plates are cast iron — not aluminum — for long service life and quiet operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSlow 420 RPM operating speed:\u003c\/strong\u003e Lower RPM means less heat, less wear, less noise, and less oil consumption compared to pumps running at 1,000+ RPM.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTapered roller bearings:\u003c\/strong\u003e Both ends of the crankshaft use tapered roller bearings for superior load support and reduced friction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision steel connecting rods:\u003c\/strong\u003e Automotive-type rod insert bearings at the crankshaft and bearings at the wrist pin for long service life and reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisc and spring valves:\u003c\/strong\u003e Easier to service than reed valves, higher efficiency, and more reliable under continuous duty.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-ring pistons:\u003c\/strong\u003e Four rings per piston for higher compression efficiency and reduced oil carry-over into the air stream.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCentrifugal unloader:\u003c\/strong\u003e Every pump starts unloaded — no fighting against pressure on startup, which protects the motor and extends pump life.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTank, Motor, and Control Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e240-gallon horizontal ASME tank:\u003c\/strong\u003e Powder-coated with channel base. ASME certified pressure vessel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eASME safety valves:\u003c\/strong\u003e Certified pressure relief hardware.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully enclosed metal belt guard:\u003c\/strong\u003e Safety compliance and pump protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCopper discharge and unloader tube or stainless-steel braided flex line:\u003c\/strong\u003e No plastic fittings in the discharge path.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-duty 1725 RPM industrial motors:\u003c\/strong\u003e Full 15% service factor or higher.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnetic starter mounted and wired (-S models):\u003c\/strong\u003e Factory-installed and pre-wired. You connect power to the panel.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eDuplex System: How It Works\u003c\/h2\u003e\n\u003cp\u003eA duplex compressor is two complete compressor units — two pumps, two motors — on a shared tank. The control system alternates which pump runs first on each cycle, keeping run hours balanced between the two units. If pump A fails, pump B keeps running. Your shop does not stop.\u003c\/p\u003e\n\n\u003ch2\u003eFactory-Mounted Options Available\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow Oil Control (#6304x2M):\u003c\/strong\u003e Shuts down the unit before oil starvation damages the pump.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHour Meter (#HRM75x2M for 230V, #HRM460x2M for 460V):\u003c\/strong\u003e Track run hours for scheduled maintenance intervals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlternator (#ALT230M or #ALT460M):\u003c\/strong\u003e Automatically alternates which pump leads each cycle to equalize wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectronic Auto Drain (#SDV03M):\u003c\/strong\u003e Automatically purges condensation from the tank on a timed cycle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Control (#DC2x2M for C2 pumps):\u003c\/strong\u003e Enables start\/stop or continuous unloaded operation. Reduces electrical bills and extends equipment life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntake Noise Silencers (#SA100x4M for C2):\u003c\/strong\u003e Reduces inlet noise without restricting airflow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBelt Tensioner (#215Dx2M for 7.5-10HP):\u003c\/strong\u003e Spring-loaded belt tensioning for consistent drive performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRight From the Start Kit (#RFS001D for 10HP):\u003c\/strong\u003e Key maintenance items for first service.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVibration Pads (#VP1004):\u003c\/strong\u003e Isolate the compressor from the floor to reduce vibration transmission.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBelt Guard Aftercooler (#BGAC1x2M, 70 CFM for 10-20HP units):\u003c\/strong\u003e Cools compressed air before it enters the tank, reducing moisture content.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAvailable Configurations — 5HP Duplex Series\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eD5112HC1-S:\u003c\/strong\u003e 2×5HP, single-phase, C1 pump (767 RPM), 120-gal, 35 CFM@175 PSI, 1,110 lbs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eD5124HC-S:\u003c\/strong\u003e 2×5HP, single-phase, C1 pump (767 RPM), 240-gal, 35 CFM@175 PSI, 1,460 lbs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eD5112HC2-S:\u003c\/strong\u003e 2×5HP, single-phase, C2 pump (420 RPM), 120-gal, 35 CFM@175 PSI, 1,300 lbs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eD5324HC2-S (this unit):\u003c\/strong\u003e 2×5HP, three-phase, C2 pump (420 RPM), 240-gal, 35 CFM@175 PSI, 1,620 lbs.\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\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep down:\u003c\/strong\u003e If downtime is manageable and budget does not justify a duplex, the Castair I538HC2-S (single-pump, 3-phase) handles the same CFM without backup. Less cost, no redundancy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThis unit:\u003c\/strong\u003e Right for shops that need backup capability on three-phase power. 35 CFM at 175 PSI handles two to three air tools simultaneously. 240-gallon tank keeps cycle frequency low.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep up (7.5HP duplex):\u003c\/strong\u003e If your shop runs more than three technicians on air tools simultaneously, move to the D7324HC2-S (2×7.5HP, 56.2 CFM@175 PSI) for more CFM headroom with the same duplex reliability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e D5324HC2-S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Duplex (2 pumps, 2 motors)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor:\u003c\/strong\u003e 2×5HP, 10HP total\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhase:\u003c\/strong\u003e 3-phase\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePump Series:\u003c\/strong\u003e C2 (cast iron)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePump RPM:\u003c\/strong\u003e 420\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCFM @ 0 PSI:\u003c\/strong\u003e 44\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCFM @ 175 PSI:\u003c\/strong\u003e 35\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTank:\u003c\/strong\u003e 240-gallon horizontal ASME\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (L×W×H):\u003c\/strong\u003e 85 × 30 × 64 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1,620 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\u003eMax Pressure:\u003c\/strong\u003e 175 PSI\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 and supporting professional-grade air compressors since 2016. We carry the full Castair lineup — not just the popular units. Free shipping on all orders. Free tech support at 866-217-0063 — call before you buy if you have questions about installation, electrical requirements, or which configuration fits your shop. Full manufacturer warranty and honest buying guidance. If a different model fits your situation better, we will tell you.\u003c\/p\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":53342541054165,"sku":"D5324HC2","price":19397.2,"currency_code":"USD","in_stock":true}],"url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-d5324hc2-s","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}