{"product_id":"castair-refrigerated-air-dryer-247-cfm-rd247-55k","title":"Castair Refrigerated Air Dryer 247 CFM - RD247-55K","description":"\u003cp\u003eThe Castair RD247-55K is a large-capacity refrigerated compressed air dryer rated at 247 CFM. This is a commercial and industrial unit for high-demand operations — large auto body operations running multiple spray booths simultaneously, manufacturing facilities with high compressed air demand, fleet maintenance shops with multiple service bays running at full capacity, or any shop where a single 25–50 HP compressor (or multiple smaller units) is feeding a large distribution system. The RD247-55K sits above Castair's standard product table; call for current pricing and availability.\u003c\/p\u003e\n\n\u003cp\u003eCastair refrigerated dryers maintain a 37°F pressure dew point — cold enough to condense and eliminate the moisture that causes air tool failures, spray finish defects, pneumatic cylinder corrosion, and piping rust. At the 247 CFM capacity of this unit, it handles the output of compressors that would overwhelm any of the smaller single-phase dryers in the Castair lineup.\u003c\/p\u003e\n\n\u003ch2\u003eHow Castair Refrigerated Dryers Work\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefrigeration cycle:\u003c\/strong\u003e Freon refrigerant (environmentally compliant R134a or R407c) chills the compressed air inside the stainless steel heat exchanger, dropping air temperature to 37°F and condensing water vapor into liquid droplets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-function single-body heat exchanger:\u003c\/strong\u003e Outgoing cold dry air pre-cools incoming hot wet air, reducing refrigerant load and improving energy efficiency across the full operating cycle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic demand drain:\u003c\/strong\u003e Ejects condensate only when liquid is present — does not bleed compressed air on a fixed timer schedule.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo computer logic required:\u003c\/strong\u003e Simple mechanical design with a reliable dew point indicator — no PLC, no programming, no proprietary control board to source when it fails.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuick-connect refrigerant port:\u003c\/strong\u003e Field recharge without full disassembly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated capacity:\u003c\/strong\u003e 247 CFM — for large compressor systems above the standard Castair product table\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure dew point:\u003c\/strong\u003e 37°F — reduces downstream condensation to near zero under rated conditions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum inlet pressure:\u003c\/strong\u003e 232 PSIG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat exchanger:\u003c\/strong\u003e Stainless steel for long service life in high-moisture industrial environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrain:\u003c\/strong\u003e Automatic, demand-based — conserves compressed air\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefrigerant:\u003c\/strong\u003e R134a or R407c (environmentally compliant, not R22)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications:\u003c\/strong\u003e UL listed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: Full dimensional specifications, electrical requirements (voltage, phase, amperage), and connection sizes for the RD247-55K are available by contacting us directly. This unit is above the standard Castair published product table. Call 866-217-0063 for current specs, pricing, and lead time.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCastair RD247-55K refrigerated air dryer unit\u003c\/li\u003e\n\u003cli\u003ePower cord and connection hardware per unit specifications\u003c\/li\u003e\n\u003cli\u003eRefrigerant pre-charged at the factory\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eA properly sized pre-filter is required for warranty coverage. Contact us for the correct filter specification for your installation.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eAvailable Configurations \/ Upgrade Path\u003c\/h2\u003e\n\u003cp\u003eThe RD247-55K is the largest unit in Castair's refrigerated dryer series available through this listing. The complete lineup for reference:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRD25-6K — 25 CFM @ 37°F:\u003c\/strong\u003e 3\/4\" NPT, 115V\/1-phase, 57 lbs. Single compressor, 5–7.5 HP.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRD59-11K — 59 CFM @ 37°F:\u003c\/strong\u003e 3\/4\" NPT, 115V\/1-phase, 73 lbs. 10–15 HP compressors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRD71-15K — 71 CFM @ 37°F:\u003c\/strong\u003e 1\" NPT, 115V\/1-phase, 110 lbs. 15–20 HP compressors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRD113-60K — 107 CFM @ 37°F:\u003c\/strong\u003e 1\" NPT, 115V\/1-phase, 119 lbs. 20–25 HP compressors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRD161-37K — 161 CFM @ 37°F:\u003c\/strong\u003e 1-1\/2\" NPT, 115V\/1-phase, 137 lbs. High-demand single-compressor shops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRD247-55K — 247 CFM @ 37°F:\u003c\/strong\u003e This unit. Large commercial and industrial operations. Call for specs and pricing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhen Does a Shop Need This vs. a Smaller Unit\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThe RD247-55K is appropriate for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eShops running compressors that produce 162–247 CFM peak demand\u003c\/li\u003e\n\u003cli\u003eLarge fleet maintenance facilities with multiple simultaneous tool operations\u003c\/li\u003e\n\u003cli\u003eAuto body operations running two or more full-size spray booths from a common air system\u003c\/li\u003e\n\u003cli\u003eManufacturing and production lines where compressed air feeds multiple pneumatic stations continuously\u003c\/li\u003e\n\u003cli\u003eSituations where a smaller dryer would be undersized at peak demand and moisture would break through at the dew point\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCapacity note:\u003c\/strong\u003e Like all Castair refrigerated dryers, rated capacity is based on 100°F inlet air temperature, 100°F ambient temperature, and 100 PSI operating pressure. At 150°F inlet air temperature, effective capacity drops to 55% of rated. At 247 CFM rated capacity, that means approximately 136 CFM effective capacity at 150°F inlet. An aftercooler before the dryer inlet is strongly recommended in high-temperature installations to maintain full rated capacity and extend dryer service life.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e RD247-55K\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCFM @ 37°F dew point:\u003c\/strong\u003e 247\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Dew Point:\u003c\/strong\u003e 37°F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Inlet Pressure:\u003c\/strong\u003e 232 PSIG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefrigerant:\u003c\/strong\u003e R134a \/ R407c\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat Exchanger:\u003c\/strong\u003e Stainless steel, dual-function single body\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrain Type:\u003c\/strong\u003e Automatic, demand-based\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications:\u003c\/strong\u003e UL Listed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrical, connection size, weight, and dimensions:\u003c\/strong\u003e Contact us for full specifications — 866-217-0063\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 Castair compressed air equipment since 2016. For a large-capacity unit like the RD247-55K, a phone call before ordering saves time — we can confirm current specs, electrical requirements, filter sizing, and lead time, and help you determine whether this dryer fits your compressor output and air demand. Free shipping on qualifying orders, free pre-sale technical support, and full Castair manufacturer warranty.\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":53342589780181,"sku":"RD247-55K","price":10630.12,"currency_code":"USD","in_stock":true}],"url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-refrigerated-air-dryer-247-cfm-rd247-55k","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}