{"product_id":"spiropure-sp-bp-420-5-5-micron-4-glazed-polypropylene-felt-bag-case","title":"SpiroPure SP-BP-420-5 5 Micron #4 Glazed Polypropylene Felt Bag - Case","description":"\u003cp\u003eIn this review of the SpiroPure SP-BP-420-5 bag filter the bottom line is clear: this is a practical choice for technicians and facilities that need a robust, chemical-resistant particulate filter for demanding liquids. The reviewer found the 5 micron glazed polypropylene felt media particularly useful where corrosive fluids, oils, or organic solvents are present, and the case quantity of 40 makes it well suited to continuous industrial use. For anyone running standard-sized housings that accept a #4 bag, this product delivers consistent filtration with a high dirt-holding capacity.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlazed polypropylene felt:\u003c\/strong\u003e provides chemical resistance and durability when filtering acids, alkalis, oils, and organic solvents.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5 micron nominal rating:\u003c\/strong\u003e captures fine particulates while maintaining reasonable flow for industrial process applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e#4 size compatibility:\u003c\/strong\u003e fits standard-sized filter housings that accept a 4 in x 15 in bag, simplifying replacements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh dirt-holding capacity:\u003c\/strong\u003e reduces change-out frequency in critical applications, lowering downtime for routine operations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase of 40:\u003c\/strong\u003e supplies enough replacement bags for multiple maintenance cycles or continuous production runs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e30-day money back guarantee:\u003c\/strong\u003e gives a short-term safety net for buyers testing fit and performance in their systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe SpiroPure SP-BP-420-5 is aimed at maintenance teams, process engineers, and labs that handle corrosive or solvent-bearing fluids and need a dependable disposable bag option. It is especially relevant for facilities that use standard #4 housings and require a steady stock of filters to keep operations running without frequent interruptions.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include users needing absolute micron ratings for critical laboratory separations or those with nonstandard housings that do not accept a #4 bag. Also, if your application requires reusable metal or cartridge filters for waste reduction, a disposable felt bag may not be the ideal long-term choice.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGood chemical compatibility from the glazed polypropylene felt for use with acids, alkalis, and solvents.\u003c\/li\u003e\n\u003cli\u003eHigh dirt-holding capacity helps extend service life between changes in demanding process conditions.\u003c\/li\u003e\n\u003cli\u003eCase pack of 40 supplies plenty of replacements for ongoing maintenance schedules.\u003c\/li\u003e\n\u003cli\u003eAvailable nominal micron rating of 5 strikes a balance between particle retention and flow.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNominal, not absolute, micron rating may be unsuitable for applications needing guaranteed particle cutoff.\u003c\/li\u003e\n\u003cli\u003eDisposable design increases consumable waste compared with reusable alternatives.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSpiroPure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eSP-BP-420-5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMedia\u003c\/td\u003e\n\u003ctd\u003eGlazed polypropylene felt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMicron rating\u003c\/td\u003e\n\u003ctd\u003e5 micron nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e#4 (4 in x 15 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003eCase of 40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eCorrosive fluids, oils, organic solvents\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eFor industrial users who need a reliable, chemically tolerant disposable bag filter that fits standard #4 housings, the SpiroPure SP-BP-420-5 is a solid value: the glazed PP felt and high dirt-holding capacity reduce change-outs and handle corrosive fluids well. It is not the right pick where absolute micron control or reusable filters are required, but for routine process filtration it balances cost and performance effectively.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this bag fit standard #4 housings?\u003c\/strong\u003e\u003cbr\u003eYes, the SP-BP-420-5 is offered in the #4 size (4 in x 15 in) to fit standard-sized filter housings that accept that bag dimension.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the 5 micron rating absolute?\u003c\/strong\u003e\u003cbr\u003eThe listed 5 micron is a nominal rating, so it indicates typical performance but is not an absolute particle cutoff for certification-grade separations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it handle acidic or solvent-based fluids?\u003c\/strong\u003e\u003cbr\u003eYes, the glazed polypropylene felt media is designed for use with corrosive fluids including acids, alkalis, oils, and organic solvents.\u003c\/p\u003e","brand":"SpiroPure","offers":[{"title":"Default Title","offer_id":48612613587163,"sku":"B08546RF4K","price":151.82,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/81BmQefVPxL._SL1500_50acd9ff-118f-4e1e-ad1f-9899dfc044ad.jpg?v=1778588365","url":"https:\/\/gearmusthave.com\/products\/spiropure-sp-bp-420-5-5-micron-4-glazed-polypropylene-felt-bag-case","provider":"GearMustHave","version":"1.0","type":"link"}