{"product_id":"castair-i30324hc4z-s","title":"Castair I30324HC4Z-S","description":"\u003ch2\u003eCastair I30324HC4Z-S: 30HP 3-Phase Industrial Air Compressor — 240 Gallon Horizontal with Mounted Starter\u003c\/h2\u003e\n\n\u003cp\u003eThe Castair I30324HC4Z-S is the top of Castair's standard Industrial Series lineup: 30 horsepower, 3-phase, 240-gallon horizontal, with factory-mounted magnetic motor starter. At 794 RPM, the C4 pump delivers 128 CFM free air and 105 CFM at 175 PSI. This is not a compressor for a small shop — it is sized for large production facilities, major body shops running multiple spray booths, truck service operations, or any environment where air demand is high and pressure consistency is non-negotiable.\u003c\/p\u003e\n\n\u003cp\u003eThe same C4 pump platform runs across the 20, 25, and 30HP configurations. At 30HP and 794 RPM, the pump is running at the upper end of the C4's rated range (15-25HP nominal, with the 30HP representing extended capacity on this platform). The result is 105 CFM at 175 PSI — enough to simultaneously support a spray booth, 3-4 impact gun stations, a plasma cutter with air assist, and general shop air demand without the system struggling to recover.\u003c\/p\u003e\n\n\u003cp\u003eThe 240-gallon ASME horizontal tank at 90 x 39 x 70 inches weighs 1,750 lbs. This is freight delivery only — plan for a loading dock or forklift at your installation site. This is also a permanent installation compressor: once it is set, it stays.\u003c\/p\u003e\n\n\u003ch2\u003eC4 Pump — Specifications\u003c\/h2\u003e\n\n\u003ch3\u003eConstruction\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePump designation:\u003c\/strong\u003e C4 — Two-stage, V4 cylinder configuration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePump RPM at 30HP:\u003c\/strong\u003e 794\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e 100% cast iron — cylinders, heads, valve plates, crankcase\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlywheel:\u003c\/strong\u003e 13-3B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil capacity:\u003c\/strong\u003e 1 gallon\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBearings:\u003c\/strong\u003e Tapered roller bearings at both crankshaft ends\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnecting rods:\u003c\/strong\u003e Precision steel with automotive-type rod insert bearings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValves:\u003c\/strong\u003e Disc and spring — field-replaceable\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePistons:\u003c\/strong\u003e 4-ring configuration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnloader:\u003c\/strong\u003e Centrifugal — loadless start-up every cycle\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTank and Frame\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTank capacity:\u003c\/strong\u003e 240 gallons, horizontal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 90 x 39 x 70 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1,750 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTank construction:\u003c\/strong\u003e Powder-coated ASME-rated steel with channel saddle frame\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety valve:\u003c\/strong\u003e ASME-rated, factory installed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBelt guard:\u003c\/strong\u003e Totally enclosed metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDischarge lines:\u003c\/strong\u003e Copper tubing or stainless braided flex line\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eMotor and Electrical\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHorsepower:\u003c\/strong\u003e 30HP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhase:\u003c\/strong\u003e 3-phase\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor speed:\u003c\/strong\u003e 1725 RPM industrial\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eService factor:\u003c\/strong\u003e 15% minimum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor starter:\u003c\/strong\u003e Factory-mounted magnetic motor starter (Z designation)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax working pressure:\u003c\/strong\u003e 175 PSI\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePerformance Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor output:\u003c\/strong\u003e 30 HP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrical:\u003c\/strong\u003e 3-phase with factory-mounted magnetic starter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTank capacity:\u003c\/strong\u003e 240 gallons, horizontal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePump:\u003c\/strong\u003e C4 (Two-stage, V4)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePump RPM:\u003c\/strong\u003e 794\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree air delivery (0 PSI):\u003c\/strong\u003e 128 CFM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDelivery at 175 PSI:\u003c\/strong\u003e 105 CFM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax pressure:\u003c\/strong\u003e 175 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (LxWxH):\u003c\/strong\u003e 90 x 39 x 70 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1,750 lbs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCastair I30324HC4Z-S compressor — fully assembled on 240-gallon horizontal tank\u003c\/li\u003e\n\u003cli\u003eFactory-mounted magnetic motor starter (Z designation)\u003c\/li\u003e\n\u003cli\u003eASME safety valve (factory installed)\u003c\/li\u003e\n\u003cli\u003ePressure switch with unloader\u003c\/li\u003e\n\u003cli\u003eTotally enclosed metal belt guard\u003c\/li\u003e\n\u003cli\u003eCopper discharge and unloader tubing (or stainless braided flex line)\u003c\/li\u003e\n\u003cli\u003eOwner's documentation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eAftercooler available as factory option (BGAC3M — for 20HP and up). Freight delivery: loading dock or forklift required. 3-phase electrical service and proper breaker sizing required — consult with your electrician before ordering.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThe Full 20-30HP Industrial Lineup Compared\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eI20324HC4Z-S:\u003c\/strong\u003e 20HP, 240gal, C4 pump, 519 RPM, 72 CFM @ 175 PSI, 1,700 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eI25324HC4Z-S:\u003c\/strong\u003e 25HP, 240gal, C4 pump, 710 RPM, 90 CFM @ 175 PSI, 1,725 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eI30324HC4Z-S (this unit):\u003c\/strong\u003e 30HP, 240gal, C4 pump, 794 RPM, 105 CFM @ 175 PSI, 1,750 lbs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe 30HP delivers 33 CFM more than the 20HP and 15 CFM more than the 25HP — substantial gains for applications that actually need that capacity. The weight difference across all three is only 50 lbs because the tank and pump assembly are the dominant cost. If your budget is within range of the 30HP, and your facility has the 3-phase service to support it, buying the extra capacity now avoids a forced upgrade later.\u003c\/p\u003e\n\n\u003ch2\u003eWhen Does a Shop Need This?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eYour continuous air demand is in the 90-105 CFM range at 175 PSI\u003c\/li\u003e\n\u003cli\u003eLarge body shop: multiple spray guns active simultaneously plus general air tool demand\u003c\/li\u003e\n\u003cli\u003eTruck service facility: running multiple bays with large-format impact tools and air chisels\u003c\/li\u003e\n\u003cli\u003eProduction environment: consistent high-volume air supply is a production constraint, not just a convenience\u003c\/li\u003e\n\u003cli\u003eYou have 3-phase electrical service rated for a 30HP motor load\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eConsider rotary screw if:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eYour demand is 100% continuous duty (never stopping) — rotary screw compressors handle 100% duty cycle more efficiently than reciprocating units. The I30324HC4Z-S is rated for intermittent-to-heavy-duty use, not true 100% continuous operation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Buy From Air Compressor Factory Direct?\u003c\/h2\u003e\n\u003cp\u003eA 30HP industrial compressor at this scale is a major facility decision. Since 2016, we have helped shops and production operations size, specify, and install equipment at this level. We can help you evaluate your electrical service capacity, confirm the footprint works in your space, and advise on aftercooler requirements for your application. There is no commission pressure here — we give you straight answers.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e to commercial addresses in the lower 48 states (freight — loading dock or forklift required)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree tech support\u003c\/strong\u003e at 866-217-0063\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFull Castair manufacturer warranty\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHonest buying guidance\u003c\/strong\u003e — we will tell you if a rotary screw is a better fit for your duty cycle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuthorized dealer\u003c\/strong\u003e with direct Castair factory support\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":53342561894613,"sku":"I30324HC4Z-S","price":23464.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0622\/8466\/0949\/files\/I30324HC4Z-S_bc12567c-fbae-43bd-9b8d-e4c0dbbf7683.jpg?v=1772675160","url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-i30324hc4z-s","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}