{"product_id":"castair-replacement-air-filter-element-for-d10-rotary-pumps-6-3-8id-x9-1-2od-rafd10","title":"Castair Replacement Air Filter Element For D10 Rotary Pumps 6 3\/8\"ID.X9 1\/2\"OD. RAFD10","description":"\u003ch2\u003eCastair Replacement Air Filter Element for D10 Rotary Pump (RAFD10)\u003c\/h2\u003e\n\n\u003cp\u003eThe Castair RAFD10 is the replacement paper air filter element for the D10 rotary screw pump, used in the 25 to 40 HP range of Castair rotary screw compressors. Dimensions are ID 6-3\/8\", OD 9-1\/2\", HGT 5\". If you are running a D10 air end on your Castair rotary screw unit, this is the correct filter replacement — confirm your air end model before ordering, as D3\/D4, D6\/D62, G11, and P75 air ends all use different filter sizes that are not interchangeable.\u003c\/p\u003e\n\n\u003cp\u003eCastair designs their rotary screw compressors around off-the-shelf automotive-style paper elements specifically so that filter changes are straightforward and parts are consistently available. The RAFD10 is a paper element — not foam, not oil-bath — which means it provides consistent filtration performance until replacement interval and gives a clear visual indicator when it needs changing. Keeping a clean air filter on a rotary screw compressor is not optional maintenance. A restricted air filter raises inlet temperature, increases oil carryover, and accelerates air end wear. Change it on schedule.\u003c\/p\u003e\n\n\u003ch3\u003eFilter Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e RAFD10\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFilter type:\u003c\/strong\u003e Paper element, dry-type\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside diameter (ID):\u003c\/strong\u003e 6-3\/8\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutside diameter (OD):\u003c\/strong\u003e 9-1\/2\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight (HGT):\u003c\/strong\u003e 5\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e D10 rotary pump air end\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHorsepower range:\u003c\/strong\u003e 25-40 HP Castair rotary screw compressors\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatibility — Verify Your Air End Before Ordering\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRAFD10:\u003c\/strong\u003e D10 air end — ID 6-3\/8\", OD 9-1\/2\", HGT 5\" (this part)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRAFD16:\u003c\/strong\u003e D16 air end — ID 6-3\/8\", OD 9-1\/2\", HGT 7-7\/8\" (50-60 HP range)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRAFD6-62:\u003c\/strong\u003e D6 and D62 air ends — ID 4-3\/4\", OD 6-1\/8\", HGT 2-7\/8\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRAFD3-4:\u003c\/strong\u003e D3, D31, D4 air ends — ID 2-7\/8\", OD 4-5\/8\", HGT 2-7\/16\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRAFG11:\u003c\/strong\u003e G11 air end — ID 2-5\/8\", OD 3-7\/8\", HGT 3-1\/8\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe D10 and D16 share the same OD and ID but differ in height. Do not substitute RAFD16 for RAFD10 or vice versa — the incorrect height will affect sealing and filter performance.\u003c\/p\u003e\n\n\u003ch3\u003eWhen to Replace\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eScheduled interval:\u003c\/strong\u003e Follow the hour meter on your compressor — Castair recommends checking air filter condition as part of routine maintenance intervals\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVisible indicator:\u003c\/strong\u003e Paper element shows dirt accumulation visually — inspect regularly in high-dust environments\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePerformance indicator:\u003c\/strong\u003e Rising operating temperature with consistent ambient temperature and load is often the first sign of a restricted air filter on a rotary screw unit\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePM kit option:\u003c\/strong\u003e MKD10 preventative maintenance kit covers the D10 air end and includes 2 air filters, 4 oil filters, 1 separator filter, and 5 gallons of synthetic CAST-LUBE oil — saves 10% vs. individual purchases\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat Is in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1x Castair RAFD10 paper air filter element\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\u003eCastair authorized:\u003c\/strong\u003e Correct OEM replacement element — no guessing on dimensions\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:\u003c\/strong\u003e 866-217-0063 — confirm your air end model and correct filter before ordering\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull filter lineup in stock:\u003c\/strong\u003e All Castair rotary pump filter elements available, plus oil filters and separator filters\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":53342584144085,"sku":"RAFD10","price":86.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0622\/8466\/0949\/files\/360_F_473254957_bxG9yf4ly7OBO5I0O5KABlN930GwaMQz_d6036540-5567-4f9a-883a-ecb1ddec9e94.jpg?v=1772652855","url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-replacement-air-filter-element-for-d10-rotary-pumps-6-3-8id-x9-1-2od-rafd10","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}