{"product_id":"castair-replacement-separator-filter-element-rsfd3-4-6-g11-p75","title":"Castair Replacement Separator Filter Element - RSFD3-4-6-G11-P75","description":"\u003cp\u003eThe \u003cstrong\u003eCastair RSFD3-4-6-G11-P75\u003c\/strong\u003e is the OEM spin-on air\/oil separator filter covering six Castair rotary screw air end variants: \u003cstrong\u003eD3, D31, D4, D6, G11, and P75\u003c\/strong\u003e. These air ends are used across the 5–20 HP range of the Castair rotary screw lineup. One part number replaces the separator filter for all six configurations — Castair rationalized the filter dimensions across this range to simplify field service. If your Castair rotary is 5–20 HP and references any of these air ends, this is your separator filter.\u003c\/p\u003e\n\n\u003ch2\u003eAir End Coverage\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eD3 \/ D31 air end:\u003c\/strong\u003e 5–10 HP rotary screw models. D31 is a variant of the D3.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eD4 air end:\u003c\/strong\u003e 5–10 HP rotary screw models.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eD6 air end:\u003c\/strong\u003e 15–20 HP rotary screw models.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eG11 air end:\u003c\/strong\u003e 5–15 HP rotary screw models.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eP75 air end:\u003c\/strong\u003e 5–15 HP rotary screw models.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy the Separator Filter Is the Critical Maintenance Item\u003c\/h2\u003e\n\u003cp\u003eOn smaller 5–20 HP rotary screw compressors running in busy shops, the separator filter often has a harder life than on larger units — these machines run frequent start-stop cycles or continuous duty in environments with higher ambient contamination. A saturated separator pushes oil downstream into your air tools and pneumatic equipment. On small machines, the symptom often appears first as mysteriously high oil consumption before you see oil in the lines. Replace the separator on schedule, not reactively.\u003c\/p\u003e\n\n\u003ch2\u003eMaintenance Kits Containing This Filter\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMKD3-4\u003c\/strong\u003e — D3, D31, D4 air ends: 2× RAFD3-4 air filters, 4× ROFD3-4-G11 oil filters, 1× RSFD3-4-6-G11-P75 separator (this part), 5 gal synthetic oil — 10% savings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMKG11\u003c\/strong\u003e — G11 air end: 2× RAFG11 air filters, 4× ROFD3-4-G11 oil filters, 1× RSFD3-4-6-G11-P75 separator (this part), 5 gal synthetic oil — 10% savings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMKP75\u003c\/strong\u003e — P75 air end: 2× 20DP air filters, 4× ROFD62-P75-P90 oil filters, 1× RSFD3-4-6-G11-P75 separator (this part), 5 gal synthetic oil — 10% savings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNote: The D6 air end shares this separator filter but uses a different oil filter (ROFD6) and is part of the MKD6 kit.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e RSFD3-4-6-G11-P75\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilter Type:\u003c\/strong\u003e Spin-on air\/oil separator filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Air Ends:\u003c\/strong\u003e Castair D3, D31, D4, D6, G11, P75\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Compressor HP:\u003c\/strong\u003e 5–20 HP rotary screw models\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Cast Air\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Buy From OEM Diagnostic Tools?\u003c\/h3\u003e\n\u003cp\u003eOEM Castair separator filters for the small-to-mid rotary screw range. Free shipping on qualifying orders. Free tech support at \u003cstrong\u003e866-217-0063\u003c\/strong\u003e. Full Castair manufacturer warranty. Confirm your air end with us before ordering if you are unsure.\u003c\/p\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":53342596333781,"sku":"RSFD3-4-6-G11-P75","price":200.22,"currency_code":"USD","in_stock":true}],"url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-replacement-separator-filter-element-rsfd3-4-6-g11-p75","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}