{"product_id":"castair-50-cfm-18-l-x-14-1-4-w-1-in-out-connections-belt-guard-aftercooler-bgac2","title":"Castair 50 CFM 18\" L X 14 1\/4\" W 1\" In\/Out Connections Belt Guard Aftercooler BGAC2","description":"\u003cp\u003eThe Castair BGAC2 is a 50 CFM belt guard aftercooler built for 15 HP reciprocating air compressors. This is the loose (unmounted) version — you get the aftercooler core itself, ready to be installed however your setup requires. It cools compressor discharge air from as high as 350°F down to within 15°F of ambient temperature, which means dramatically less water vapor making it past your air dryer and into your lines, tools, and equipment.\u003c\/p\u003e\n\n\u003cp\u003eIf you are dealing with water in your compressed air system — rusty lines, water shooting from blow guns, air tools failing early, paint jobs ruined by moisture — an aftercooler installed at the compressor discharge is the right first step. Desiccant dryers and refrigerated dryers both work better when they are not fighting 200°F+ air. The BGAC2 does the heavy cooling so your downstream equipment does not have to.\u003c\/p\u003e\n\n\u003ch3\u003eCore Performance Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCFM Rating:\u003c\/strong\u003e 50 CFM — matched to 15 HP reciprocating compressors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Air Temperature:\u003c\/strong\u003e Performance rated at 250°F inlet air temperature\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Operating Pressure:\u003c\/strong\u003e 250 PSIG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Operating Temperature:\u003c\/strong\u003e 350°F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCooling Performance:\u003c\/strong\u003e Cools discharge air to within 15°F above ambient temperature\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoisture Reduction:\u003c\/strong\u003e Reduces water content in the air stream by up to 65%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhysics behind the numbers:\u003c\/strong\u003e Water content drops approximately 50% for every 20°F reduction in air temperature — the BGAC2 typically delivers a 150–200°F temperature drop, which is where the 65% figure comes from\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePhysical Dimensions and Connections\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCore Size:\u003c\/strong\u003e 18 in L x 14-1\/4 in W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Connection:\u003c\/strong\u003e 1 in NPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Connection:\u003c\/strong\u003e 1 in NPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 12 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Loose unit — not pre-mounted, not a kit. Just the aftercooler core with connections ready for installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow Belt Guard Aftercoolers Work\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir-cooled design:\u003c\/strong\u003e The aftercooler core is positioned in the airflow generated by the compressor flywheel fan. No separate cooling fan motor required — the compressor''s own rotation drives cooling air across the core.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDischarge-point cooling:\u003c\/strong\u003e Hot compressed air exits the compressor cylinder head and passes through the aftercooler before entering the receiver tank or distribution system. Cooling happens immediately, before water vapor has a chance to condense inside your tanks and lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoisture separator pairing:\u003c\/strong\u003e For maximum water removal, pair the BGAC2 with a moisture separator\/trap at the aftercooler outlet. The aftercooler drops the temperature; the separator catches the condensate that drops out of solution.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondensate drain:\u003c\/strong\u003e Install a manual or automatic drain at the lowest point after the aftercooler. Without a drain, the moisture you collect just accumulates.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat This Unit Is (and Is Not)\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLoose unit:\u003c\/strong\u003e The BGAC2 is the aftercooler core itself. It is not pre-mounted to a belt guard panel and does not include a mounting bracket kit. You mount and plumb it according to your specific compressor layout.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexibility:\u003c\/strong\u003e The loose configuration is appropriate when you are integrating into a custom enclosure, replacing an existing aftercooler, or mounting in a non-standard position.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot a dryer replacement:\u003c\/strong\u003e An aftercooler removes a large percentage of moisture, but not all. For applications requiring very dry air (spray painting, air bearing equipment, certain pneumatic controls), follow the aftercooler with a refrigerated or desiccant dryer.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting position:\u003c\/strong\u003e Position the core in the path of the compressor flywheel fan''s airflow for best cooling efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlumbing:\u003c\/strong\u003e Use 1 in NPT fittings and high-temperature hose or hard pipe rated for 250 PSIG and 350°F between the compressor discharge and aftercooler inlet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrain placement:\u003c\/strong\u003e Install a condensate drain at the aftercooler outlet or in the first low point of the distribution system downstream.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIf you need mounting hardware:\u003c\/strong\u003e Order the BGAC2K kit version, which includes brackets and hardware for belt guard mounting. If you need a pre-mounted assembly ready to bolt onto your compressor, order the BGAC2M.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e BGAC2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Cast Air (Castair)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCFM Capacity:\u003c\/strong\u003e 50 CFM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCore Dimensions:\u003c\/strong\u003e 18 in L x 14-1\/4 in W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Connection:\u003c\/strong\u003e 1 in NPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Connection:\u003c\/strong\u003e 1 in NPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 12 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Pressure:\u003c\/strong\u003e 250 PSIG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Temperature:\u003c\/strong\u003e 350°F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Inlet Temperature:\u003c\/strong\u003e 250°F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCooling to:\u003c\/strong\u003e Within 15°F of ambient temperature\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoisture Reduction:\u003c\/strong\u003e Up to 65%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompressor Match:\u003c\/strong\u003e 15 HP reciprocating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Loose (unmounted)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrice:\u003c\/strong\u003e $464.31\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAvailable Configurations — Full BGAC Series Lineup\u003c\/h3\u003e\n\u003cp\u003eCast Air makes belt guard aftercoolers in four sizes. Match the aftercooler to your compressor''s horsepower and CFM output:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBGAC1 \/ BGAC1M — 35 CFM:\u003c\/strong\u003e 18 in x 10-1\/2 in core, 3\/4 in NPT connections, 8 lbs. Fits 5, 7, and 10 HP compressors. Smaller core, smaller connections — do not use on a 15 HP machine.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBGAC2 \/ BGAC2M — 50 CFM (this unit):\u003c\/strong\u003e 18 in x 14-1\/4 in core, 1 in NPT connections, 12 lbs. Fits 15 HP. Available loose (BGAC2), mounted (BGAC2M), kit (BGAC2K), or duplex (BGAC2x2M).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBGAC3 \/ BGAC3M — 75 CFM:\u003c\/strong\u003e 24 in x 20-1\/2 in core, 1 in NPT connections, 20 lbs. Fits 20+ HP compressors. Significantly larger core surface area for higher flow rates.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBGAC4 \/ BGAC4M — 100 CFM:\u003c\/strong\u003e 23 in x 26-1\/2 in core, 1 in NPT connections, 25 lbs. For larger systems requiring higher throughput.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUndersizing an aftercooler means the air does not spend enough time in the core to cool properly. Oversizing is not harmful but wastes money. Match CFM to your compressor''s rated output at the working pressure you run.\u003c\/p\u003e\n\n\u003ch3\u003eWhen Does a Shop Need This vs. Stepping Up or Down\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eYou need the BGAC2 if:\u003c\/strong\u003e You have a 15 HP reciprocating compressor and are seeing moisture problems downstream — water in lines, tools failing from rust, water in spray gun air, condensate in receiver tanks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep down to BGAC1 if:\u003c\/strong\u003e Your compressor is 10 HP or smaller. The 35 CFM BGAC1 is sized for that output range and is less expensive.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep up to BGAC3 if:\u003c\/strong\u003e Your compressor is 20 HP or larger, or if you are running 15 HP hard in a hot environment and want more core surface area for better cooling margin.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChoose BGAC2M over BGAC2 if:\u003c\/strong\u003e You want a factory-mounted assembly ready to bolt onto the belt guard panel of your compressor — no custom fabrication required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChoose BGAC2K over BGAC2 if:\u003c\/strong\u003e You want the loose aftercooler core plus the mounting hardware\/brackets to install it on a belt guard yourself.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChoose BGAC2x2M if:\u003c\/strong\u003e You have a duplex (twin-pump) compressor and need aftercooler coverage on both pump discharge lines, or if you need 100 CFM total aftercooling capacity from a paired setup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Buy From Air Compressor Factory Direct\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecialist since 2016:\u003c\/strong\u003e We focus on compressed air equipment — compressors, aftercoolers, dryers, separators, and accessories. Not a general industrial distributor where air equipment is a footnote.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree shipping:\u003c\/strong\u003e No freight surprises on orders to the continental United States.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree tech support:\u003c\/strong\u003e Call 866-217-0063 and talk to someone who knows these products. We can help you confirm the right aftercooler for your specific compressor model and application.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull manufacturer warranty:\u003c\/strong\u003e Cast Air aftercoolers carry the full factory warranty. No gray-market or diverted stock.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHonest sizing guidance:\u003c\/strong\u003e If the BGAC2 is not the right fit for your system, we will tell you before you order — not after.\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":53342518247637,"sku":"BGAC2","price":856.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0622\/8466\/0949\/files\/CastairAirCooledAftercooler_68fabf30-09c1-4bc0-9bed-9f85d7ca5fd9.jpg?v=1772652578","url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-50-cfm-18-l-x-14-1-4-w-1-in-out-connections-belt-guard-aftercooler-bgac2","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}