{"product_id":"castair-dryer-motor-3-4hp-dm75","title":"Castair Dryer Motor 3\/4HP - DM75","description":"\u003cp\u003eThe Castair DM75 is a 3\/4 HP motor designed to mount a Castair refrigerated compressed air dryer directly onto your compressor. Specifically, it's listed for the RD59-11K dryer and smaller — Castair's lineup of refrigerated dryers rated at 59 CFM and below. The DM75 comes with a 3\/4-inch NPT 3-ball valve bypass, metal flex hose, and vibration pads, giving you everything needed to mount the dryer on the compressor unit itself rather than on the wall or floor nearby.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Mount the Dryer on the Compressor?\u003c\/h2\u003e\n\u003cp\u003eRefrigerated compressed air dryers are most commonly wall-mounted or floor-mounted downstream of the compressor and tank. That's the standard installation — and it works fine. But compressor-mounted installation has practical advantages in smaller shops or installations where floor space is tight:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle footprint:\u003c\/strong\u003e Compressor and dryer occupy one location instead of two\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShorter plumbing runs:\u003c\/strong\u003e Dryer connects directly to the compressor discharge, reducing the amount of piping needed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCleaner installation:\u003c\/strong\u003e No separate mounting bracket, wall hardware, or floor stand required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasier relocation:\u003c\/strong\u003e If the compressor moves, the dryer moves with it\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe trade-off is that the dryer must be sized appropriately to handle the compressor's discharge temperature and CFM. At compressor discharge, air temperatures can reach 100°F or higher. Castair refrigerated dryers are rated at 100°F inlet and 100°F ambient. If your compressor discharges hotter than 100°F, dryer capacity is derated — at 150°F inlet, capacity drops to 55% of the rated CFM. For the RD59-11K mounted via DM75, that means at 150°F inlet air you're effectively getting 32–33 CFM of drying capacity rather than 59 CFM.\u003c\/p\u003e\n\n\u003ch2\u003eCompatible Dryer Models\u003c\/h2\u003e\n\u003cp\u003eThe DM75 motor mount kit is designed for Castair refrigerated dryers in the RD59-11K size 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, 10.6x17.9x19.6\"\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, 10.6x19.1x22.4\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor the RD71-15K or larger dryers, use the DP100 instead — a standalone bypass plumbing kit that does not mount directly to the compressor.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included with DM75\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3\/4\" NPT 3-ball valve bypass assembly\u003c\/strong\u003e — allows dryer to be isolated for service without shutting down the compressor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMetal flex hose\u003c\/strong\u003e — absorbs vibration between compressor discharge and dryer inlet, reducing stress on dryer connections\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVibration isolation pads\u003c\/strong\u003e — isolates dryer from compressor vibration to extend dryer life\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Castair Refrigerated Dryers\u003c\/h2\u003e\n\u003cp\u003eWhen you add the DM75 mounting kit, you're pairing it with one of Castair's refrigerated dryers. Here's what those dryers do and how they're built:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e37°F dew point:\u003c\/strong\u003e All Castair refrigerated dryers are designed to maintain a 37°F pressure dew point, which ensures that at the point of expansion (air tools, paint guns, pneumatic controls), condensation is minimal even in warm shop conditions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefrigerant:\u003c\/strong\u003e R134a and R407c — environmentally friendly refrigerants with quick-connect for recharge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat exchanger:\u003c\/strong\u003e Stainless steel for even heat transfer and longevity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrain:\u003c\/strong\u003e Automatic moisture drain that only cycles when water is present — conserves compressed air compared to timer-based drains\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrical:\u003c\/strong\u003e 115V, 1-phase, 60Hz with 9-foot three-prong cord\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax inlet pressure:\u003c\/strong\u003e 232 psig\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo programming required:\u003c\/strong\u003e Simple dew point indicator, no computer logic\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eUL listed\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhen to Choose DM75 vs. DP100\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDM75 (this unit):\u003c\/strong\u003e For compressor-mounted installation on RD59-11K or smaller dryers. Use when you want the dryer physically on the compressor and your dryer is in the smaller size range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDP100:\u003c\/strong\u003e For RD71-15K or larger dryers. This kit plumbs the bypass but does not mount the dryer on the compressor — the dryer stands alone or is wall-mounted. Use when the dryer is too large or heavy for compressor mounting, or when a separate mounting location is preferred.\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 stock Castair dryers and mounting accessories\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 size the right dryer and confirm the DM75 fits your installation\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 you need the DP100 or a larger dryer, we'll tell you before you order\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":53342545379541,"sku":"DM75","price":894.6,"currency_code":"USD","in_stock":true}],"url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-dryer-motor-3-4hp-dm75","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}