{"product_id":"castair-dryer-motor-3-4hp-w-receiver-dryer-dm75rd","title":"Castair Dryer Motor 3\/4HP w\/ Receiver Dryer - DM75RD","description":"\u003cp\u003eThe Castair DM75RD bundles the DM75 compressor-mounted dryer motor kit with a receiver dryer — giving you both the refrigerated dryer mounting hardware and a supplemental moisture separator in one package. The receiver dryer handles bulk moisture removal upstream of the refrigerated dryer, which extends refrigerated dryer efficiency and life. If you're building out a complete moisture control system for a shop compressor, the DM75RD is the more complete starting point compared to the standalone DM75.\u003c\/p\u003e\n\n\u003ch2\u003eWhat the Receiver Dryer Adds\u003c\/h2\u003e\n\u003cp\u003eA refrigerated compressed air dryer works by cooling compressed air to condense moisture, then draining the condensate before the air continues into the distribution system. But highly saturated air — common from compressors in humid environments or high-output systems — can overwhelm a refrigerated dryer if moisture levels are too high entering the unit.\u003c\/p\u003e\n\n\u003cp\u003eA receiver dryer (also called a separator or coalescing pre-filter) upstream of the refrigerated dryer handles the heaviest water load first. It separates bulk liquid water and compressor oil aerosols before the air enters the refrigerated dryer. This means:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefrigerated dryer runs cleaner:\u003c\/strong\u003e Less liquid load on the refrigerant heat exchanger extends service intervals and dryer life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConsistent dew point:\u003c\/strong\u003e The refrigerated dryer can more easily maintain the 37°F dew point when it's not overwhelmed by bulk moisture\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBetter air quality downstream:\u003c\/strong\u003e Two-stage separation removes both bulk liquid and fine moisture aerosols\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatible Dryer Models\u003c\/h2\u003e\n\u003cp\u003eLike the DM75, the DM75RD is sized for compressor-mounted installation on Castair refrigerated dryers at RD59-11K and smaller:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRD25-6K:\u003c\/strong\u003e 25 CFM @ 37°F dew point, 3\/4\" NPT, 115V\/1ph, 3.0A, 57 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRD59-11K:\u003c\/strong\u003e 59 CFM @ 37°F dew point, 3\/4\" NPT, 115V\/1ph, 6.5A, 73 lbs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's Included with DM75RD\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e3\/4\" NPT 3-ball valve bypass assembly\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eMetal flex hose\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eVibration isolation pads\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e3\/4 HP dryer motor\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReceiver dryer\/separator\u003c\/strong\u003e — pre-filters bulk moisture and oil aerosols before the refrigerated dryer\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhen to Choose DM75RD vs. DM75\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDM75 (mounting kit only):\u003c\/strong\u003e Use when you already have adequate upstream filtration (pre-filter, separator, or aftercooler) and just need the dryer mounting hardware\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDM75RD (this unit):\u003c\/strong\u003e Use when you're building a complete installation from scratch and want the receiver dryer included. Best for shops in humid climates, high-output systems, or where air quality matters most (paint booths, precision pneumatic equipment)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDP75RD:\u003c\/strong\u003e Standalone version with receiver dryer but without compressor mounting — for installations where the dryer goes on the wall or floor rather than on the compressor\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Castair Refrigerated Dryers\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTarget dew point:\u003c\/strong\u003e 37°F — ensures dry air at the point of use under normal shop conditions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefrigerant:\u003c\/strong\u003e R134a and R407c, environmentally friendly with quick-connect recharge fitting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat exchanger:\u003c\/strong\u003e Stainless steel for consistent performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic drain:\u003c\/strong\u003e Only activates when moisture is present — no wasted compressed air\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e 115V, 1-phase, 60Hz, 9-foot cord\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax inlet pressure:\u003c\/strong\u003e 232 psig\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eUL listed, no programming required\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eCapacity is based on 100°F inlet air and 100°F ambient at 100 psi. At 150°F inlet temperature, capacity drops to 55% of rated CFM.\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\u003eSpecialist since 2016\u003c\/strong\u003e — we understand complete compressed air treatment systems, not just individual components\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e on qualifying orders\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree tech support at 866-217-0063\u003c\/strong\u003e — we can help you plan a full moisture removal system for your shop\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull manufacturer warranty\u003c\/strong\u003e on all Castair equipment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHonest guidance\u003c\/strong\u003e — if the DM75 without the receiver dryer is sufficient for your installation, we'll tell you\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":53342546460885,"sku":"DM75RD","price":896.02,"currency_code":"USD","in_stock":true}],"url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-dryer-motor-3-4hp-w-receiver-dryer-dm75rd","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}