{"product_id":"castair-bgac4m","title":"Castair BGAC4M","description":"\u003cp\u003eThe Castair BGAC4M is the compressor-mounted version of the BGAC4 belt guard aftercooler — the largest unit in the BGAC series, rated at 100 CFM and configured for direct mounting to the compressor frame. The M designation differentiates this from the BGAC4 loose unit: the BGAC4M ships pre-configured for integration into the Castair compressor assembly, not as a field-install standalone unit. The core performance is the same — 100 CFM capacity, 1\" NPT connections, 250 PSIG maximum pressure, cooling discharge air to within 15°F of ambient while removing up to 65% of moisture.\u003c\/p\u003e\n\n\u003cp\u003eIf you are ordering a Castair compressor with aftercooling built into the assembly at the top of the BGAC range, or replacing a failed BGAC4M on an existing compressor, this is the correct part. For standalone or field-retrofit installations, the BGAC4 loose unit is the more appropriate option.\u003c\/p\u003e\n\n\u003ch3\u003eWhat an Aftercooler Does at 100 CFM\u003c\/h3\u003e\n\u003cp\u003eLarge reciprocating compressors generate substantial heat. At high output, discharge air temperatures at the pump head commonly reach 250°F. At that temperature, moisture stays suspended in vapor form and travels with the airstream into the tank, through distribution lines, and into downstream tools, valves, cylinders, and spray equipment. The BGAC4M stops that at the source.\u003c\/p\u003e\n\u003cp\u003eMounted within the belt guard assembly, the BGAC4M intercepts the discharge air immediately after the pump head. The large finned core — 23\" x 26-1\/2\" — provides the cooling surface needed to bring 100 CFM of compressed air down to within 15°F of ambient temperature. Moisture condenses, collects, and drains before the air ever reaches the tank. What passes through the system is cooler, significantly drier air.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature reduction:\u003c\/strong\u003e Cools compressed air to within 15°F above ambient at 100 CFM rated flow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoisture removal:\u003c\/strong\u003e Eliminates up to 65% of water content before it reaches the tank and distribution system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100 CFM capacity:\u003c\/strong\u003e The largest aftercooler in the Castair BGAC series — sized for the highest-output reciprocating compressors in the lineup\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo cooling water connection:\u003c\/strong\u003e Air-to-air design — 1\" NPT air inlet and outlet are the only connections required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompressor-mounted configuration:\u003c\/strong\u003e Integrates directly into the compressor frame assembly — no separate mounting or external plumbing runs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eDesign and Construction\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompressor-mounted configuration:\u003c\/strong\u003e Ships ready for direct mounting to the Castair compressor frame — the M suffix distinguishes it from the BGAC4 loose unit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBelt guard integration:\u003c\/strong\u003e Fits within the belt guard structure for a compact, factory-clean installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\" NPT connections:\u003c\/strong\u003e Standard 1\" NPT inlet and outlet — matches the discharge plumbing of high-output Castair reciprocating compressors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e250 PSIG maximum operating pressure:\u003c\/strong\u003e Handles the full output pressure range of large industrial reciprocating compressors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e350°F maximum operating temperature:\u003c\/strong\u003e Rated for the actual discharge temperatures produced by large-frame pump heads under sustained load\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance tested at 250°F inlet:\u003c\/strong\u003e All ratings verified at real compressor discharge conditions — not ambient test conditions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLargest core in the series:\u003c\/strong\u003e At 23\" x 26-1\/2\" and 25 lbs, the BGAC4 core provides the cooling surface needed for 100 CFM throughput\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 BGAC4M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCFM Rating:\u003c\/strong\u003e 100 CFM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 23\" L x 26-1\/2\" W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 25 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Connection:\u003c\/strong\u003e 1\" NPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Connection:\u003c\/strong\u003e 1\" NPT\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\u003eOutlet Temperature:\u003c\/strong\u003e Within 15°F of ambient\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoisture Reduction:\u003c\/strong\u003e Up to 65%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance Basis:\u003c\/strong\u003e 250°F inlet air temperature\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Compressor-mounted (M suffix)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBase Model:\u003c\/strong\u003e BGAC4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePosition in Series:\u003c\/strong\u003e Top tier — largest unit in the BGAC lineup\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Cast Air (Castair)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAvailable Configurations — Full BGAC Series Lineup\u003c\/h3\u003e\n\u003cp\u003eCastair produces the BGAC series in four sizes. Each size is available as a loose unit and a compressor-mounted version (M suffix). The mounted versions are for compressor assembly integration; the loose units are for field installation and retrofits.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBGAC1 \/ BGAC1M:\u003c\/strong\u003e 35 CFM — 18\" x 10-1\/2\", 3\/4\" NPT connections, 8 lbs — fits 5, 7, and 10 HP compressors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBGAC2 \/ BGAC2M:\u003c\/strong\u003e 50 CFM — 18\" x 14-1\/4\", 1\" NPT connections, 12 lbs — fits 15 HP compressors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBGAC3 \/ BGAC3M:\u003c\/strong\u003e 75 CFM — 24\" x 20-1\/2\", 1\" NPT connections, 20 lbs — fits 20 HP and larger compressors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBGAC4 \/ BGAC4M:\u003c\/strong\u003e 100 CFM — 23\" x 26-1\/2\", 1\" NPT connections, 25 lbs — top-tier unit for the highest-output systems (this unit)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe BGAC4 is the loose unit. The BGAC4M is this compressor-mounted version. If you are replacing an existing mounted aftercooler, verify whether the original was the M configuration before ordering — a loose BGAC4 requires different mounting than the BGAC4M. Call 866-217-0063 to confirm before you order.\u003c\/p\u003e\n\n\u003ch3\u003eWhen Does a Shop Need the BGAC4M vs. the BGAC4 or a Smaller Unit?\u003c\/h3\u003e\n\u003cp\u003eThe BGAC4M is the right part in these specific situations:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompressor assembly with integrated aftercooling:\u003c\/strong\u003e Ordering a new Castair compressor configured with a top-tier aftercooler as part of the assembly — the M version ensures proper mounting alignment and bracket fitment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect replacement for an existing BGAC4M:\u003c\/strong\u003e The original mounted aftercooler has failed — the M configuration is required to match the existing mounting hardware\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFactory-spec installations:\u003c\/strong\u003e Some Castair compressor models specify the BGAC4M in the original build documentation — use the same configuration to maintain factory specs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf you are doing a field retrofit on an existing compressor and mounting the aftercooler independently — not to the compressor frame — the BGAC4 loose unit gives you more installation flexibility. If your compressor output is within the 75 CFM range, the BGAC3M may be the more appropriate size. Call us with your compressor model and we can confirm the right configuration and size before you order.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Buy From Air Compressor Factory Direct?\u003c\/h3\u003e\n\u003cp\u003eWe have been specializing in air compressor parts, components, and accessories since 2016. We carry the full Castair BGAC series in both loose unit and compressor-mounted configurations. When you call, you reach someone who can confirm whether you need the BGAC4 or BGAC4M, and whether the BGAC4 is the right size for your compressor — not a call center reading from a product list.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e on qualifying orders\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree technical support\u003c\/strong\u003e at 866-217-0063 — fitment and configuration confirmation before you order\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull manufacturer warranty\u003c\/strong\u003e on all Castair products\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHonest guidance\u003c\/strong\u003e — if the BGAC3M is the correct size for your compressor, we will say so\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":53342519820501,"sku":"BGAC4M","price":0.0,"currency_code":"USD","in_stock":true}],"url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-bgac4m","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}