{"product_id":"castair-refrigerated-air-dryer-166-cfm-rd166-37k","title":"Castair Refrigerated Air Dryer 166 CFM - RD166-37K","description":"\u003ch2\u003eCastair Refrigerated Air Dryer — 161 CFM @ 37F (RD166-37K)\u003c\/h2\u003e\n\n\u003cp\u003eThe Castair RD166-37K is a large-capacity refrigerated compressed air dryer, rated for 161 CFM at a 37 degree F dew point (181 CFM at 50 degrees F). It connects with 1-1\/2\" NPT fittings, runs on 115V single-phase drawing 11.4 amps, weighs 137 lbs, and measures 11.4 x 33.7 x 24.5 inches. This is the largest standard-stocked model in the Castair refrigerated dryer lineup and is sized for higher-output compressors in the 25-40 HP range producing up to 130 CFM at standard conditions.\u003c\/p\u003e\n\n\u003cp\u003eNote: The Castair catalog lists the comparable model as the RD161-37K (161 CFM at 37F). If your system requires exactly 166 CFM or above, contact us at 866-217-0063 — Castair makes custom larger sizes available by phone quote for flows above the standard lineup.\u003c\/p\u003e\n\n\u003ch3\u003ePerformance Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e RD166-37K\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCFM capacity @ 37 degree F dew point:\u003c\/strong\u003e 161 CFM (per published Castair data for this size class)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCFM capacity @ 50 degree F dew point:\u003c\/strong\u003e 181 CFM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRated at:\u003c\/strong\u003e 100 degree F inlet air, 100 degree F ambient, 100 PSI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-temp derating:\u003c\/strong\u003e At 150 degree F inlet, capacity reduces to approximately 55% (approx. 89 CFM)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTarget dew point:\u003c\/strong\u003e 37 degrees F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum inlet pressure:\u003c\/strong\u003e 232 PSIG\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePhysical and Electrical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInlet\/outlet connections:\u003c\/strong\u003e 1-1\/2\" NPT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 115V, 1-phase, 60 Hz\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower cord:\u003c\/strong\u003e 9-foot, 3-prong\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCurrent draw:\u003c\/strong\u003e 11.4 amps\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 137 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions (WxDxH):\u003c\/strong\u003e 11.4\" x 33.7\" x 24.5\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRefrigerant:\u003c\/strong\u003e R134a and R407c\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuick-connect refrigerant recharge port:\u003c\/strong\u003e Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUL listed:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKey Design Features\u003c\/h3\u003e\n\u003cul\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\u003eCondensate drain:\u003c\/strong\u003e Automatic, demand-activated — only cycles when water is present\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDew point indicator:\u003c\/strong\u003e Visual — no computer programming required\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo computer logic:\u003c\/strong\u003e Simple to operate and troubleshoot\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1-1\/2\" NPT connections:\u003c\/strong\u003e Match your main air header line — keep resistance low on high-flow systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCastair Refrigerated Dryer Lineup\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eCFM @ 37F\u003c\/th\u003e\n\u003cth\u003eConnections\u003c\/th\u003e\n\u003cth\u003eAmps\u003c\/th\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eRD25-6K\u003c\/td\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003ctd\u003e3\/4\" NPT\u003c\/td\u003e\n\u003ctd\u003e3.0\u003c\/td\u003e\n\u003ctd\u003e57 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eRD59-11K\u003c\/td\u003e\n\u003ctd\u003e59\u003c\/td\u003e\n\u003ctd\u003e3\/4\" NPT\u003c\/td\u003e\n\u003ctd\u003e6.5\u003c\/td\u003e\n\u003ctd\u003e73 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eRD71-15K\u003c\/td\u003e\n\u003ctd\u003e71\u003c\/td\u003e\n\u003ctd\u003e1\" NPT\u003c\/td\u003e\n\u003ctd\u003e7.5\u003c\/td\u003e\n\u003ctd\u003e110 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eRD113-60K\u003c\/td\u003e\n\u003ctd\u003e107\u003c\/td\u003e\n\u003ctd\u003e1\" NPT\u003c\/td\u003e\n\u003ctd\u003e9.0\u003c\/td\u003e\n\u003ctd\u003e119 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRD166-37K\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e~161\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e1-1\/2\" NPT\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e11.4\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e137 lbs\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003eFor systems requiring more than 161 CFM, call Castair directly or contact us at 866-217-0063 — larger dryers are available by quote.\u003c\/p\u003e\n\n\u003ch3\u003eWhen Does a Shop Need This Dryer?\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eThe RD166-37K is sized for:\u003c\/strong\u003e 25 to 40 HP rotary screw compressors producing up to 160 CFM. If you have a 30 HP R30312 unit producing 130 CFM, or a multi-compressor bank totaling that flow, this is the dryer that handles the full output without derating the system.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCritical sizing note:\u003c\/strong\u003e Ratings are based on 100 degree F inlet air and 100 degree F ambient temperature at 100 PSI. Compressor rooms that run hotter than 100F require you to apply the 55% derating factor. A dryer that is technically rated for your flow at 100F inlet may be undersized at 120F or 130F inlet. If your equipment room runs hot, size up.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePre-filter is required for warranty:\u003c\/strong\u003e Install a properly sized particulate pre-filter (Castair C-FS or equivalent) upstream of this dryer. The 1-1\/2\" NPT inlet means you need at least a FS112 or FS114 filter on the incoming line — call 866-217-0063 for pre-filter recommendations.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Options\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eInline installation between compressor discharge and air header\u003c\/li\u003e\n  \u003cli\u003eFor this size dryer (1-1\/2\" NPT), Castair recommends the DP100 installation option — bypass valve plumbed but dryer not mounted directly on compressor\u003c\/li\u003e\n  \u003cli\u003eUse a Castair metal flex hose and bypass valve to allow dryer maintenance without shutting down the air system\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat Is in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eCastair RD166-37K refrigerated air dryer\u003c\/li\u003e\n  \u003cli\u003e9-foot, 3-prong power cord\u003c\/li\u003e\n  \u003cli\u003eAutomatic condensate drain\u003c\/li\u003e\n  \u003cli\u003eDew point indicator\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003ePre-filter is required (not included) — contact 866-217-0063 for pre-filter sizing.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eWhy Buy From Air Compressor Factory Direct?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCastair specialists:\u003c\/strong\u003e Full dryer lineup plus filters, pre-filters, bypass valves, and flex hose\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e to commercial addresses\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFree tech support:\u003c\/strong\u003e 866-217-0063 — dryer sizing, pre-filter selection, installation configuration\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHonest guidance:\u003c\/strong\u003e If your system needs more than 161 CFM, we will tell you upfront and get you a quote on larger capacity\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":53342589747413,"sku":"RD166-37K","price":6992.08,"currency_code":"USD","in_stock":true}],"url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-refrigerated-air-dryer-166-cfm-rd166-37k","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}