[{"data":1,"prerenderedAt":681},["ShallowReactive",2],{"site-footer-common":3,"glossary:p84-nomex-ryton-filter-media":45,"glossary-related:p84-nomex-ryton-filter-media":241},{"id":4,"extension":5,"footer":6,"meta":40,"navbar":41,"stem":43,"__hash__":44},"common\u002Fcommon.yml","yml",{"tagline":7,"links":8,"sections":9},"Acoustic cleaning intelligence for industrial fouling, soot, ash, dust and build-up.",[],[10,19,31],{"title":11,"links":12},"Product",[13,16],{"label":14,"to":15},"How it works","\u002F#product",{"label":17,"to":18},"Cost assessment","\u002F#hero",{"title":20,"links":21},"Company",[22,25,28],{"label":23,"to":24},"What we build","\u002F#about",{"label":26,"to":27},"Careers","\u002F#careers",{"label":29,"to":30},"Contact","\u002F#contact",{"title":32,"links":33},"Resources",[34,37],{"label":35,"to":36},"Blog","\u002Fresources\u002Fblog",{"label":38,"to":39},"Glossary","\u002Fglossary",{},{"links":42},[],"common","YocmZRy1AYfBbpgGVms-zhdiABlF8VTxHx6h4rDmZBA",{"id":46,"title":47,"aliases":48,"body":55,"category":219,"description":220,"extension":221,"meta":222,"navigation":223,"path":224,"relatedTerms":225,"seo":228,"sources":231,"stem":238,"term":239,"__hash__":240},"glossary\u002Fglossary\u002Fp84-nomex-ryton-filter-media.md","P84 \u002F Nomex \u002F Ryton filter media",[49,50,51,52,53,54],"P84 filter bag","Nomex filter bag","Ryton filter bag","PPS filter bag","polyimide filter bag","aramid filter bag",{"type":56,"value":57,"toc":212},"minimark",[58,80,85,168,172,188,192],[59,60,61,65,66,69,70,73,74,79],"p",{},[62,63,64],"strong",{},"P84",", ",[62,67,68],{},"Nomex"," and ",[62,71,72],{},"Ryton"," are three mainstream high-temperature synthetic ",[75,76,78],"a",{"href":77},"\u002Fglossary\u002Ffilter-bag","filter-bag"," media used in industrial baghouses. Each is engineered for a different combination of temperature and gas chemistry.",[81,82,84],"h2",{"id":83},"side-by-side","Side-by-side",[86,87,88,110],"table",{},[89,90,91],"thead",{},[92,93,94,98,101,104,107],"tr",{},[95,96,97],"th",{},"Media",[95,99,100],{},"Polymer",[95,102,103],{},"Continuous max temp",[95,105,106],{},"Strengths",[95,108,109],{},"Typical use",[111,112,113,130,151],"tbody",{},[92,114,115,118,121,124,127],{},[116,117,68],"td",{},[116,119,120],{},"Meta-aramid",[116,122,123],{},"200 °C",[116,125,126],{},"Good flex life, dimensional stability",[116,128,129],{},"Asphalt, foundry, metallurgical off-gas",[92,131,132,134,137,140,143],{},[116,133,64],{},[116,135,136],{},"Polyimide",[116,138,139],{},"240 °C",[116,141,142],{},"High fibre surface area; excellent dust release; ideal for sticky dust",[116,144,145,146,150],{},"Cement kiln, lime kiln, ",[75,147,149],{"href":148},"\u002Fglossary\u002Fwaste-to-energy","biomass",", iron-ore pelletising",[92,152,153,156,159,162,165],{},[116,154,155],{},"Ryton (PPS)",[116,157,158],{},"Polyphenylene sulphide",[116,160,161],{},"190 °C",[116,163,164],{},"Excellent acid resistance, including sulphurous and dilute mineral acids",[116,166,167],{},"Coal-fired utility baghouses, sulphur recovery, WtE",[81,169,171],{"id":170},"selection-logic","Selection logic",[59,173,174,175,69,179,182,183,187],{},"The choice is usually constrained by two questions: ",[176,177,178],"em",{},"what is the highest continuous temperature?",[176,180,181],{},"is the flue gas chemically aggressive — sulphurous, acidic, hygroscopic?"," P84 is favoured where dust is sticky and temperature is high. Ryton is favoured where SO₂\u002FSO₃ chemistry attacks lesser media. Nomex is the budget high-temperature option for less aggressive duty. For sub-1 mg\u002FNm³ outlets, any of these are typically overlaid with a ",[75,184,186],{"href":185},"\u002Fglossary\u002Fptfe-membrane-filter-bag","PTFE membrane",".",[81,189,191],{"id":190},"related-terms","Related terms",[193,194,195,201,206],"ul",{},[196,197,198],"li",{},[75,199,200],{"href":77},"Filter bag",[196,202,203],{},[75,204,205],{"href":185},"PTFE-membrane filter bag",[196,207,208],{},[75,209,211],{"href":210},"\u002Fglossary\u002Ffibreglass-filter-bag","Fibreglass filter bag",{"title":213,"searchDepth":214,"depth":214,"links":215},"",2,[216,217,218],{"id":83,"depth":214,"text":84},{"id":170,"depth":214,"text":171},{"id":190,"depth":214,"text":191},"baghouse","P84, Nomex and Ryton are three mainstream high-temperature synthetic filter-bag media used in industrial baghouses. Each is engineered for a different combination of temperature and gas chemistry.","md",{},true,"\u002Fglossary\u002Fp84-nomex-ryton-filter-media",[78,226,227],"ptfe-membrane-filter-bag","fibreglass-filter-bag",{"title":229,"description":230},"P84, Nomex and Ryton — high-temperature synthetic filter media compared","P84 (polyimide), Nomex (aramid) and Ryton (PPS) are the three mainstream high-temperature synthetic filter media for baghouses. Each is matched to a different gas chemistry.",[232,235],{"title":233,"url":234},"Wikipedia — Polyphenylene sulfide","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPolyphenylene_sulfide",{"title":236,"url":237},"Wikipedia — Aramid","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAramid","glossary\u002Fp84-nomex-ryton-filter-media","P84, Nomex and Ryton filter media","4OnX2N85IrlUTdns6Bo5OfpVG45TlyWilO_Te5gJ4vM",[242,463,575],{"id":243,"title":200,"aliases":244,"body":247,"category":219,"description":447,"extension":221,"meta":448,"navigation":223,"path":77,"relatedTerms":449,"seo":454,"sources":457,"stem":461,"term":200,"__hash__":462},"glossary\u002Fglossary\u002Ffilter-bag.md",[245,246],"filter bags","bag (baghouse)",{"type":56,"value":248,"toc":442},[249,271,275,283,371,375,410,412],[59,250,251,252,255,256,260,261,265,266,270],{},"A ",[62,253,254],{},"filter bag"," is the cylindrical fabric sock that traps particulate inside a ",[75,257,259],{"href":258},"\u002Fglossary\u002Ffabric-filter","fabric filter",". Bags are typically 120–300 mm in diameter and 2–10 m long, suspended vertically from the ",[75,262,264],{"href":263},"\u002Fglossary\u002Ftubesheet","tubesheet",", supported internally by a wire ",[75,267,269],{"href":268},"\u002Fglossary\u002Fbag-cage","bag cage"," and sealed at the top by a snap-band collar.",[81,272,274],{"id":273},"media-selection","Media selection",[59,276,277,278,69,280,187],{},"Bag media must match the application temperature, gas chemistry, dust load and cleaning system. See ",[75,279,47],{"href":224},[75,281,282],{"href":185},"PTFE membrane filter bag",[86,284,285,297],{},[89,286,287],{},[92,288,289,292,295],{},[95,290,291],{},"Material",[95,293,294],{},"Max continuous temp",[95,296,109],{},[111,298,299,310,321,331,341,350,361],{},[92,300,301,304,307],{},[116,302,303],{},"Polyester",[116,305,306],{},"135 °C",[116,308,309],{},"Cement, food, light industrial",[92,311,312,315,318],{},[116,313,314],{},"Polypropylene",[116,316,317],{},"90 °C",[116,319,320],{},"Wet chemistry, washdown",[92,322,323,326,328],{},[116,324,325],{},"Nomex (aramid)",[116,327,123],{},[116,329,330],{},"Asphalt, metallurgical",[92,332,333,336,338],{},[116,334,335],{},"P84 (polyimide)",[116,337,139],{},[116,339,340],{},"Cement, biomass",[92,342,343,345,347],{},[116,344,155],{},[116,346,161],{},[116,348,349],{},"Coal-fired utility, sulphur-rich",[92,351,352,355,358],{},[116,353,354],{},"Fibreglass",[116,356,357],{},"260 °C",[116,359,360],{},"Cement, WtE high-temperature",[92,362,363,366,368],{},[116,364,365],{},"PTFE (Teflon)",[116,367,357],{},[116,369,370],{},"Aggressive chemistry, sub-mg outlet",[81,372,374],{"id":373},"failure-modes","Failure modes",[193,376,377,386,392,398,404],{},[196,378,379,385],{},[62,380,381],{},[75,382,384],{"href":383},"\u002Fglossary\u002Fbag-blinding","Bag blinding"," — pore choking that raises ΔP",[196,387,388,391],{},[62,389,390],{},"Abrasion"," — wear at the bottom of the bag from falling cake",[196,393,394,397],{},[62,395,396],{},"Thermal degradation"," — exceeding the media's continuous-service rating",[196,399,400,403],{},[62,401,402],{},"Hydrolysis \u002F acid attack"," — at the cold end below the acid dew point",[196,405,406,409],{},[62,407,408],{},"Cage corrosion"," — failure of the cage allows bag collapse",[81,411,191],{"id":190},[193,413,414,419,425,430,434,438],{},[196,415,416],{},[75,417,418],{"href":258},"Fabric filter",[196,420,421],{},[75,422,424],{"href":423},"\u002Fglossary\u002Fbaghouse","Baghouse",[196,426,427],{},[75,428,429],{"href":268},"Bag cage",[196,431,432],{},[75,433,205],{"href":185},[196,435,436],{},[75,437,211],{"href":210},[196,439,440],{},[75,441,384],{"href":383},{"title":213,"searchDepth":214,"depth":214,"links":443},[444,445,446],{"id":273,"depth":214,"text":274},{"id":373,"depth":214,"text":374},{"id":190,"depth":214,"text":191},"A filter bag is the cylindrical fabric sock that traps particulate inside a fabric filter. Bags are typically 120–300 mm in diameter and 2–10 m long, suspended vertically from the tubesheet, supported internally by a wire bag cage and sealed at the top by a snap-band collar.",{},[450,219,451,226,227,452,453],"fabric-filter","bag-cage","p84-nomex-ryton-filter-media","bag-blinding",{"title":455,"description":456},"Filter bag — the cylindrical fabric element of a baghouse","A filter bag is the cylindrical fabric sock that traps particulate inside a fabric filter. Media selection depends on temperature, gas chemistry, dust load and cleaning cycle.",[458],{"title":459,"url":460},"Wikipedia — Baghouse","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBaghouse","glossary\u002Ffilter-bag","c5qm1D9QdtuF4K2dtGAjDJ_qJJmuF0iuEqVTUcRXqww",{"id":464,"title":205,"aliases":465,"body":469,"category":219,"description":563,"extension":221,"meta":564,"navigation":223,"path":185,"relatedTerms":565,"seo":566,"sources":569,"stem":573,"term":205,"__hash__":574},"glossary\u002Fglossary\u002Fptfe-membrane-filter-bag.md",[466,467,468],"PTFE membrane bag","ePTFE filter bag","Teflon membrane bag",{"type":56,"value":470,"toc":557},[471,484,488,500,504,524,528,536,538],[59,472,251,473,475,476,479,480,483],{},[62,474,205],{}," carries a microporous expanded-polytetrafluoroethylene (ePTFE) membrane laminated to the outside surface of a base felt (usually polyester, P84 or PPS). Particulate is trapped on the membrane surface rather than within the depth of the felt — ",[176,477,478],{},"surface filtration",", also called ",[176,481,482],{},"cake filtration on a membrane",". Outlet particulate of below 1 mg\u002FNm³ is routinely achievable.",[81,485,487],{"id":486},"why-surface-filtration-changes-the-operating-regime","Why surface filtration changes the operating regime",[59,489,490,491,495,496,499],{},"In a conventional depth-filtration bag, particulate gradually loads into the felt itself, raising ",[75,492,494],{"href":493},"\u002Fglossary\u002Fdifferential-pressure-baghouse","differential pressure"," over weeks and eventually causing ",[75,497,498],{"href":383},"bag blinding",". A PTFE membrane prevents particulate ingress; cleaning is more complete because the entire cake sits on a non-stick surface; ΔP stabilises quickly after each pulse-jet cycle.",[81,501,503],{"id":502},"where-ptfe-membrane-bags-are-specified","Where PTFE-membrane bags are specified",[193,505,506,512,515,518,521],{},[196,507,508,511],{},[75,509,510],{"href":148},"Waste-to-energy"," baghouses with strict particulate limits",[196,513,514],{},"Hazardous-waste incineration",[196,516,517],{},"Pharmaceutical and food-grade applications",[196,519,520],{},"Cement bypass baghouses",[196,522,523],{},"Replacements for conventional bags facing tightened emission limits",[81,525,527],{"id":526},"cleaning-compatibility","Cleaning compatibility",[59,529,530,531,535],{},"PTFE-membrane bags tolerate ",[75,532,534],{"href":533},"\u002Fglossary\u002Fsonic-horn","sonic-horn"," cleaning without surface damage, provided horns are mounted to project sound across the bag rows rather than directly at any single bag at close range.",[81,537,191],{"id":190},[193,539,540,544,548,552],{},[196,541,542],{},[75,543,200],{"href":77},[196,545,546],{},[75,547,47],{"href":224},[196,549,550],{},[75,551,384],{"href":383},[196,553,554],{},[75,555,556],{"href":533},"Sonic horn",{"title":213,"searchDepth":214,"depth":214,"links":558},[559,560,561,562],{"id":486,"depth":214,"text":487},{"id":502,"depth":214,"text":503},{"id":526,"depth":214,"text":527},{"id":190,"depth":214,"text":191},"A PTFE-membrane filter bag carries a microporous expanded-polytetrafluoroethylene (ePTFE) membrane laminated to the outside surface of a base felt (usually polyester, P84 or PPS). Particulate is trapped on the membrane surface rather than within the depth of the felt — surface filtration, also called cake filtration on a membrane. Outlet particulate of below 1 mg\u002FNm³ is routinely achievable.",{},[78,452,453,534],{"title":567,"description":568},"PTFE-membrane filter bag — surface filtration for sub-mg particulate","A PTFE-membrane filter bag has a microporous Teflon membrane laminated to the surface of a base felt. Particulate is trapped on the membrane, not within the depth, giving sub-mg outlet performance.",[570],{"title":571,"url":572},"Wikipedia — Polytetrafluoroethylene","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPolytetrafluoroethylene","glossary\u002Fptfe-membrane-filter-bag","xdkHgDGDp_b3Zu1LKD-pAzJu8fK5YBj49NQ-mU1snOM",{"id":576,"title":211,"aliases":577,"body":581,"category":219,"description":668,"extension":221,"meta":669,"navigation":223,"path":210,"relatedTerms":670,"seo":672,"sources":675,"stem":679,"term":211,"__hash__":680},"glossary\u002Fglossary\u002Ffibreglass-filter-bag.md",[578,579,580],"fibreglass bag","glass-fibre filter bag","woven fibreglass bag",{"type":56,"value":582,"toc":662},[583,594,597,608,612,635,639,645,647],[59,584,251,585,588,589,593],{},[62,586,587],{},"fibreglass filter bag"," is woven from glass-fibre yarn, normally finished with a PTFE, silicone or graphite coating to improve flex resistance and dust release. Continuous service rating is up to 260 °C, peaking briefly higher. Fibreglass is the standard bag medium for coal-fired utility ",[75,590,592],{"href":591},"\u002Fglossary\u002Freverse-air-baghouse","reverse-air baghouses"," and for high-temperature cement-kiln duty.",[81,595,106],{"id":596},"strengths",[193,598,599,602,605],{},[196,600,601],{},"Highest continuous-temperature rating of mainstream media (260 °C)",[196,603,604],{},"Dimensionally stable, low thermal shrinkage",[196,606,607],{},"Compatible with sulphurous flue gas after appropriate coating",[81,609,611],{"id":610},"weaknesses","Weaknesses",[193,613,614,626,632],{},[196,615,616,617,621,622,625],{},"Brittle — does not tolerate sharp flexing from aggressive ",[75,618,620],{"href":619},"\u002Fglossary\u002Fpulse-jet-cleaning-cycle","pulse-jet cleaning","; favours ",[75,623,624],{"href":591},"reverse-air"," design",[196,627,628,629,631],{},"Limited cleanability — cake can adhere; often paired with a ",[75,630,186],{"href":185}," overlay for tighter outlet limits",[196,633,634],{},"Hydrolyses below the acid dew point in sulphurous gas",[81,636,638],{"id":637},"acoustic-cleaning-compatibility","Acoustic cleaning compatibility",[59,640,641,644],{},[75,642,643],{"href":533},"Sonic horns"," installed on a reverse-air fibreglass baghouse supplement the gentle reverse-air cycle without the bag-flex fatigue that would arise from more aggressive primary cleaning. This is a particularly well-suited combination on coal-fired utility duty.",[81,646,191],{"id":190},[193,648,649,653,658],{},[196,650,651],{},[75,652,200],{"href":77},[196,654,655],{},[75,656,657],{"href":591},"Reverse-air baghouse",[196,659,660],{},[75,661,205],{"href":185},{"title":213,"searchDepth":214,"depth":214,"links":663},[664,665,666,667],{"id":596,"depth":214,"text":106},{"id":610,"depth":214,"text":611},{"id":637,"depth":214,"text":638},{"id":190,"depth":214,"text":191},"A fibreglass filter bag is woven from glass-fibre yarn, normally finished with a PTFE, silicone or graphite coating to improve flex resistance and dust release. Continuous service rating is up to 260 °C, peaking briefly higher. Fibreglass is the standard bag medium for coal-fired utility reverse-air baghouses and for high-temperature cement-kiln duty.",{},[78,671,226],"reverse-air-baghouse",{"title":673,"description":674},"Fibreglass filter bag — high-temperature woven glass-fibre media","A fibreglass filter bag is woven from glass-fibre yarn and rated for continuous service to 260 °C. The standard bag for coal-fired utility reverse-air baghouses and high-temperature cement duty.",[676],{"title":677,"url":678},"Wikipedia — Glass fiber","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGlass_fiber","glossary\u002Ffibreglass-filter-bag","K4E_bDUfLfeDnwtweWrmFOhrQheCTeIO81M9O_GC1Oc",1782613721202]