{"product_id":"castair-ac120","title":"Castair AC120","description":"\u003cp\u003eThe \u003cstrong\u003eCastair AC120 Free Standing Aftercooler\u003c\/strong\u003e is a purpose-built heat exchanger that mounts in the discharge line between your compressor and the receiver tank. Its job is simple but critical: cool the hot, moisture-laden compressed air coming off the pump before it enters your tank and air lines. Hot compressed air holds water vapor in suspension — the moment that air cools down, the moisture drops out as liquid condensate. Do that cooling \u003cem\u003ebefore\u003c\/em\u003e the tank instead of inside the tank, and you catch the water at one controlled point with a drain, instead of letting it spread through 200 feet of air piping into your tools, guns, and equipment.\u003c\/p\u003e\n\n\u003cp\u003eThe AC120 handles \u003cstrong\u003e120 CFM\u003c\/strong\u003e at up to 250 PSIG and up to 350°F inlet air temperature, making it the right fit for compressor systems in the 25–40 HP range that discharge at the temperatures and pressures typical of two-stage reciprocating and rotary screw machines. Every shop that sprays paint, runs air-powered precision equipment, or uses a refrigerated dryer downstream needs to understand one fact: your air dryer works significantly better when the air arrives pre-cooled. An aftercooler is not optional equipment for a serious compressed air system — it is the first stage of your air treatment train.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Hot Compressed Air Destroys Shop Equipment\u003c\/h2\u003e\n\u003cp\u003eA two-stage reciprocating compressor discharges air at 250–350°F. At that temperature, the air is carrying all the water vapor it can hold in suspension. When that superheated air hits your receiver tank and cools to ambient conditions, it releases moisture — inside the tank. That condensate sits on the tank floor, promotes rust, and every time you open a tool or air gun, you are pulling water-saturated air through it. Over months, water ruins:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePaint and clear coat jobs:\u003c\/strong\u003e water in the air line causes fisheye, blushing, and adhesion failure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir-powered precision tools:\u003c\/strong\u003e moisture corrodes internal bearings, vanes, and rotors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePneumatic controls and automation:\u003c\/strong\u003e water in solenoid valves and actuators causes sticking, leaking, and failure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefrigerated air dryers:\u003c\/strong\u003e dryers sized for 70°F inlet air become overwhelmed when fed 120°F air from a hot tank; they cannot keep up and pass wet air downstream\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAn aftercooler solves all of these problems at the source. Cool the air before the tank, remove the moisture with a drain, and everything downstream — dryers, filters, tools, spray guns — works correctly and lasts longer.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features of the AC120 Aftercooler\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e120 CFM Capacity:\u003c\/strong\u003e Rated for compressed air systems producing up to 120 CFM — sized for 25–40 HP compressor packages typical in busy auto repair shops, body shops, and fleet facilities\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e250 PSIG Maximum Pressure:\u003c\/strong\u003e Handles the full pressure range of two-stage reciprocating and rotary screw compressors without restriction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e350°F Maximum Inlet Air Temperature:\u003c\/strong\u003e Engineered to accept the hottest discharge air from industrial compressor pumps without damage or performance loss\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCools to Within 15°F of Ambient:\u003c\/strong\u003e The AC120 brings compressed air temperature down to within 15 degrees of the ambient shop temperature — if your shop is 70°F, your air exits at approximately 85°F or less\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e65% Total Water Reduction:\u003c\/strong\u003e Removes approximately 65% of the total water vapor load from the compressed air stream before it reaches your tank — every 20-degree temperature drop removes 50% of remaining moisture\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1-1\/2 inch NPT Inlet and Outlet Ports:\u003c\/strong\u003e Standard NPT connections for straightforward integration into existing discharge piping\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFan-Cooled Heat Exchanger:\u003c\/strong\u003e Electric fan drives ambient air across the heat exchanger core — no water connection required, no water treatment, no drain-back concerns\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e115V \/ 1-Phase \/ 60 Hz Power:\u003c\/strong\u003e Standard single-phase power for the cooling fan — plug into any standard shop outlet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFloor or Suspended Mounting:\u003c\/strong\u003e Mount it upright on the floor next to the compressor, or hang it from overhead structure to save floor space\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHorizontal or Vertical Air Flow:\u003c\/strong\u003e Configurable for your installation layout\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 43.5 inches H x 14.75 inches W x 46.5 inches D\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 140 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinnesota-Built:\u003c\/strong\u003e Castair manufactures in Minnesota to industrial-grade standards built for long service life in demanding environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat is in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCastair AC120 free standing aftercooler unit\u003c\/li\u003e\n\u003cli\u003eFan assembly and motor (pre-installed)\u003c\/li\u003e\n\u003cli\u003e1-1\/2 inch NPT inlet and outlet fittings\u003c\/li\u003e\n\u003cli\u003eMounting hardware for floor installation\u003c\/li\u003e\n\u003cli\u003eInstallation documentation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eOptional accessories available separately: filter with automatic drain, temperature control valve #86816.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eAvailable Configurations — Full Castair Free Standing Aftercooler Lineup\u003c\/h2\u003e\n\u003cp\u003eCastair produces a complete range of free standing aftercoolers to match compressors from small single-phase units to large industrial two-stage machines. Match the aftercooler CFM rating to your compressor's rated output CFM:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFSAC35:\u003c\/strong\u003e 35 CFM, 3\/4 inch NPT — for small single-phase compressors, 5–7.5 HP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFSAC50:\u003c\/strong\u003e 50 CFM, 1 inch NPT — for 7.5–10 HP compressor packages\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFSAC75:\u003c\/strong\u003e 75 CFM, 1 inch NPT — for 10–15 HP units\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFSAC100:\u003c\/strong\u003e 100 CFM, 1-1\/4 inch NPT — for 15–25 HP compressors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAC120:\u003c\/strong\u003e 120 CFM, 1-1\/2 inch NPT — for 25–40 HP compressors \u003cem\u003e(this unit)\u003c\/em\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAC150:\u003c\/strong\u003e 150 CFM, 1-1\/2 inch NPT — for 40–50 HP compressors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAC240:\u003c\/strong\u003e 240 CFM, 2 inch NPT — for 50–75 HP industrial compressors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAC300:\u003c\/strong\u003e 300 CFM, 2 inch NPT — for 75–100 HP large industrial systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAll models share the same 250 PSIG \/ 350°F maximum ratings and 15°F approach temperature performance. Contact us if you need help sizing the right model for your compressor output.\u003c\/p\u003e\n\n\u003ch2\u003eBelt Guard Style Aftercoolers — Alternative Mounting Option\u003c\/h2\u003e\n\u003cp\u003eCastair also offers belt guard-mounted aftercoolers that install directly on the compressor in place of the belt guard — a compact solution for installations where floor or ceiling space is limited:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBGAC1:\u003c\/strong\u003e 35 CFM — for small belt-drive compressors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBGAC2:\u003c\/strong\u003e 50 CFM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBGAC3:\u003c\/strong\u003e 75 CFM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBGAC4:\u003c\/strong\u003e 100 CFM\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBelt guard models top out at 100 CFM. At the AC120 capacity level, the free standing unit is the correct choice.\u003c\/p\u003e\n\n\u003ch2\u003eWhen Does a Shop Need the AC120?\u003c\/h2\u003e\n\u003cp\u003eThe AC120 is sized for compressors producing 100–120 CFM — typically 25–40 HP two-stage reciprocating units or equivalent rotary screw compressors. This covers a wide range of serious shop installations:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-bay auto repair shops\u003c\/strong\u003e running 3–5 lifts, multiple impact wrenches, and air ratchets simultaneously from one compressor header\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody shops and collision repair facilities\u003c\/strong\u003e where air quality directly determines paint finish quality — one bad job traced to wet air costs more than an aftercooler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFleet maintenance operations\u003c\/strong\u003e running tire equipment, air tools, and pneumatic lifts across multiple bays continuously\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMachine shops\u003c\/strong\u003e running air-powered precision equipment, air chucks, and coolant blow-off where moisture causes surface contamination\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAny shop with a refrigerated air dryer\u003c\/strong\u003e — an aftercooler upstream reduces the dryer's load dramatically and keeps it working correctly even when the shop is hot in summer\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf your compressor is under 100 CFM, step down to the FSAC100. If your compressor produces over 120 CFM, step up to the AC150 or AC240. Oversizing an aftercooler is not harmful, but undersizing one means it cannot keep up at peak demand.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e AC120\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Castair (Cast Air) — Minnesota, USA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e 120 CFM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Working Pressure:\u003c\/strong\u003e 250 PSIG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Inlet Air Temperature:\u003c\/strong\u003e 350°F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApproach Temperature:\u003c\/strong\u003e Within 15°F of ambient air temperature\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Removal:\u003c\/strong\u003e Approximately 65% of total moisture load (based on 250°F inlet air)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePort Size:\u003c\/strong\u003e 1-1\/2 inch NPT (inlet and outlet)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e 115V, 1-phase, 60 Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Options:\u003c\/strong\u003e Floor standing or suspended overhead\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir Flow Orientation:\u003c\/strong\u003e Horizontal or vertical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 43.5 inches H x 14.75 inches W x 46.5 inches D\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 140 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance Basis:\u003c\/strong\u003e Specifications based on 250°F inlet air temperature at rated CFM\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eOptional Accessories\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilter with Automatic Drain:\u003c\/strong\u003e Captures and automatically purges condensate collected at the aftercooler outlet — eliminates manual drain intervals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Control Valve #86816:\u003c\/strong\u003e Modulates cooling fan operation to maintain consistent outlet air temperature — useful in cold climates to prevent overcooling and freeze-up in winter months\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Buy From Air Compressor Factory Direct?\u003c\/h2\u003e\n\u003cp\u003eAir Compressor Factory Direct has been supplying commercial and industrial compressed air equipment since 2016. We are not a general hardware retailer — we specialize in compressed air systems and the people who buy from us are shop owners, maintenance managers, and facilities engineers who need the right equipment the first time. When you call us, you reach someone who can discuss your compressor model, your shop load, your downstream air treatment, and tell you exactly which aftercooler fits your installation.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree Shipping:\u003c\/strong\u003e Every Castair aftercooler ships free to the continental US\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree Pre-Sale Technical Support:\u003c\/strong\u003e Call us before you order — we will verify sizing, mounting options, and accessory requirements for your specific compressor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull Manufacturer Warranty:\u003c\/strong\u003e All Castair equipment carries full factory warranty coverage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHonest Guidance:\u003c\/strong\u003e If the AC120 is not the right size for your compressor, we will tell you — and point you to the model that is\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCastair Specialist:\u003c\/strong\u003e We stock the full Castair aftercooler lineup and can answer model-specific questions\u003c\/li\u003e\n\u003c\/ul\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":53342512611541,"sku":"AC120","price":0.0,"currency_code":"USD","in_stock":true}],"url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-ac120","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}