[{"data":1,"prerenderedAt":631},["ShallowReactive",2],{"site-footer-common":3,"glossary:bag-cage":45,"glossary-related:bag-cage":176},{"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":52,"category":158,"description":159,"extension":160,"meta":161,"navigation":162,"path":163,"relatedTerms":164,"seo":167,"sources":170,"stem":174,"term":47,"__hash__":175},"glossary\u002Fglossary\u002Fbag-cage.md","Bag cage",[49,50,51],"filter bag cage","retainer cage","support cage",{"type":53,"value":54,"toc":151},"minimark",[55,85,90,93,97,125,128,132],[56,57,58,59,63,64,69,70,74,75,79,80,84],"p",{},"A ",[60,61,62],"strong",{},"bag cage"," is the welded wire frame that holds a ",[65,66,68],"a",{"href":67},"\u002Fglossary\u002Ffilter-bag","filter bag"," open against the ",[65,71,73],{"href":72},"\u002Fglossary\u002Fdifferential-pressure-baghouse","differential pressure"," of a ",[65,76,78],{"href":77},"\u002Fglossary\u002Fpulse-jet-baghouse","pulse-jet baghouse",". Without the cage the bag would collapse inwards on the dirty-gas side and block flow. Cages are typically galvanised carbon steel, with longer-life options in 304 \u002F ",[65,81,83],{"href":82},"\u002Fglossary\u002Faisi-316-316l-stainless","316 stainless"," for corrosive duty.",[86,87,89],"h2",{"id":88},"construction","Construction",[56,91,92],{},"A standard cage has 8–20 vertical wires welded to top, bottom and intermediate rings. The top ring carries the venturi assembly through which the pulse-jet air enters; the bottom is closed with a disc. Cage diameter is fractionally smaller than the bag's inside diameter so the bag slides over it without bunching.",[86,94,96],{"id":95},"cage-related-failures","Cage-related failures",[98,99,100,107,113,119],"ul",{},[101,102,103,106],"li",{},[60,104,105],{},"Corrosion"," — galvanised steel attacked by sulphurous or chloride-rich gas",[101,108,109,112],{},[60,110,111],{},"Wire breakage"," — usually at weld points after thermal cycling",[101,114,115,118],{},[60,116,117],{},"Loss of roundness"," — distortion under uneven cleaning pulses",[101,120,121,124],{},[60,122,123],{},"Venturi loss"," — separates from the cage top, reducing pulse penetration",[56,126,127],{},"A failed cage typically destroys the bag within hours of detection.",[86,129,131],{"id":130},"related-terms","Related terms",[98,133,134,139,145],{},[101,135,136],{},[65,137,138],{"href":67},"Filter bag",[101,140,141],{},[65,142,144],{"href":143},"\u002Fglossary\u002Fbaghouse","Baghouse",[101,146,147],{},[65,148,150],{"href":149},"\u002Fglossary\u002Ftubesheet","Tubesheet",{"title":152,"searchDepth":153,"depth":153,"links":154},"",2,[155,156,157],{"id":88,"depth":153,"text":89},{"id":95,"depth":153,"text":96},{"id":130,"depth":153,"text":131},"baghouse","A bag cage is the welded wire frame that holds a filter bag open against the differential pressure of a pulse-jet baghouse. Without the cage the bag would collapse inwards on the dirty-gas side and block flow. Cages are typically galvanised carbon steel, with longer-life options in 304 \u002F 316 stainless for corrosive duty.","md",{},true,"\u002Fglossary\u002Fbag-cage",[165,158,166],"filter-bag","tubesheet",{"title":168,"description":169},"Bag cage — the wire frame that supports a filter bag","A bag cage is the welded wire frame that holds a filter bag open against differential pressure inside a pulse-jet baghouse. Cage corrosion or breakage causes immediate bag collapse.",[171],{"title":172,"url":173},"Wikipedia — Baghouse","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBaghouse","glossary\u002Fbag-cage","ugY5moubsV1OUBX0jFgegS6k-rRHe0rx8Kvya0Mda48",[177,408,528],{"id":178,"title":138,"aliases":179,"body":182,"category":158,"description":392,"extension":160,"meta":393,"navigation":162,"path":67,"relatedTerms":394,"seo":401,"sources":404,"stem":406,"term":138,"__hash__":407},"glossary\u002Fglossary\u002Ffilter-bag.md",[180,181],"filter bags","bag (baghouse)",{"type":53,"value":183,"toc":387},[184,200,204,217,316,320,355,357],[56,185,58,186,188,189,193,194,196,197,199],{},[60,187,68],{}," is the cylindrical fabric sock that traps particulate inside a ",[65,190,192],{"href":191},"\u002Fglossary\u002Ffabric-filter","fabric filter",". Bags are typically 120–300 mm in diameter and 2–10 m long, suspended vertically from the ",[65,195,166],{"href":149},", supported internally by a wire ",[65,198,62],{"href":163}," and sealed at the top by a snap-band collar.",[86,201,203],{"id":202},"media-selection","Media selection",[56,205,206,207,211,212,216],{},"Bag media must match the application temperature, gas chemistry, dust load and cleaning system. See ",[65,208,210],{"href":209},"\u002Fglossary\u002Fp84-nomex-ryton-filter-media","P84 \u002F Nomex \u002F Ryton filter media"," and ",[65,213,215],{"href":214},"\u002Fglossary\u002Fptfe-membrane-filter-bag","PTFE membrane filter bag",".",[218,219,220,236],"table",{},[221,222,223],"thead",{},[224,225,226,230,233],"tr",{},[227,228,229],"th",{},"Material",[227,231,232],{},"Max continuous temp",[227,234,235],{},"Typical use",[237,238,239,251,262,273,284,295,306],"tbody",{},[224,240,241,245,248],{},[242,243,244],"td",{},"Polyester",[242,246,247],{},"135 °C",[242,249,250],{},"Cement, food, light industrial",[224,252,253,256,259],{},[242,254,255],{},"Polypropylene",[242,257,258],{},"90 °C",[242,260,261],{},"Wet chemistry, washdown",[224,263,264,267,270],{},[242,265,266],{},"Nomex (aramid)",[242,268,269],{},"200 °C",[242,271,272],{},"Asphalt, metallurgical",[224,274,275,278,281],{},[242,276,277],{},"P84 (polyimide)",[242,279,280],{},"240 °C",[242,282,283],{},"Cement, biomass",[224,285,286,289,292],{},[242,287,288],{},"Ryton (PPS)",[242,290,291],{},"190 °C",[242,293,294],{},"Coal-fired utility, sulphur-rich",[224,296,297,300,303],{},[242,298,299],{},"Fibreglass",[242,301,302],{},"260 °C",[242,304,305],{},"Cement, WtE high-temperature",[224,307,308,311,313],{},[242,309,310],{},"PTFE (Teflon)",[242,312,302],{},[242,314,315],{},"Aggressive chemistry, sub-mg outlet",[86,317,319],{"id":318},"failure-modes","Failure modes",[98,321,322,331,337,343,349],{},[101,323,324,330],{},[60,325,326],{},[65,327,329],{"href":328},"\u002Fglossary\u002Fbag-blinding","Bag blinding"," — pore choking that raises ΔP",[101,332,333,336],{},[60,334,335],{},"Abrasion"," — wear at the bottom of the bag from falling cake",[101,338,339,342],{},[60,340,341],{},"Thermal degradation"," — exceeding the media's continuous-service rating",[101,344,345,348],{},[60,346,347],{},"Hydrolysis \u002F acid attack"," — at the cold end below the acid dew point",[101,350,351,354],{},[60,352,353],{},"Cage corrosion"," — failure of the cage allows bag collapse",[86,356,131],{"id":130},[98,358,359,364,368,372,377,383],{},[101,360,361],{},[65,362,363],{"href":191},"Fabric filter",[101,365,366],{},[65,367,144],{"href":143},[101,369,370],{},[65,371,47],{"href":163},[101,373,374],{},[65,375,376],{"href":214},"PTFE-membrane filter bag",[101,378,379],{},[65,380,382],{"href":381},"\u002Fglossary\u002Ffibreglass-filter-bag","Fibreglass filter bag",[101,384,385],{},[65,386,329],{"href":328},{"title":152,"searchDepth":153,"depth":153,"links":388},[389,390,391],{"id":202,"depth":153,"text":203},{"id":318,"depth":153,"text":319},{"id":130,"depth":153,"text":131},"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.",{},[395,158,396,397,398,399,400],"fabric-filter","bag-cage","ptfe-membrane-filter-bag","fibreglass-filter-bag","p84-nomex-ryton-filter-media","bag-blinding",{"title":402,"description":403},"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.",[405],{"title":172,"url":173},"glossary\u002Ffilter-bag","c5qm1D9QdtuF4K2dtGAjDJ_qJJmuF0iuEqVTUcRXqww",{"id":409,"title":144,"aliases":410,"body":414,"category":158,"description":513,"extension":160,"meta":514,"navigation":162,"path":143,"relatedTerms":515,"seo":521,"sources":524,"stem":526,"term":144,"__hash__":527},"glossary\u002Fglossary\u002Fbaghouse.md",[411,412,413],"baghouses","bag filter house","dust collector house",{"type":53,"value":415,"toc":508},[416,432,436,448,452,455,471,473],[56,417,58,418,420,421,423,424,428,429,431],{},[60,419,158],{}," is the structural enclosure that houses the bags, cages, cleaning system, ",[65,422,166],{"href":149},", ",[65,425,427],{"href":426},"\u002Fglossary\u002Fplenum-clean-side-dirty-side","plenums"," and hoppers of a ",[65,430,395],{"href":191}," dust collector. The word is used in both broad (\"the plant has a 12-compartment baghouse\") and narrow (\"a baghouse is the housing, the fabric filter is the system\") senses; in everyday industry practice the two terms overlap.",[86,433,435],{"id":434},"compartmented-design","Compartmented design",[56,437,438,439,442,443,447],{},"Large industrial baghouses are subdivided into several compartments — each with its own gas-flow damper — so that one compartment can be isolated for offline cleaning or bag replacement while the rest stay online. The standard ",[65,440,441],{"href":77},"pulse-jet"," compartment count for utility duty is 8–16; cement and ",[65,444,446],{"href":445},"\u002Fglossary\u002Fwaste-to-energy","WtE"," baghouses may run 20+.",[86,449,451],{"id":450},"why-sonic-horns-help","Why sonic horns help",[56,453,454],{},"Sonic horns mounted at compartment level address fouling that the primary cleaning system (pulse-jet, reverse-air or shaker) cannot reach:",[98,456,457,460,465,468],{},[101,458,459],{},"Bag-row dead zones at the back of the compartment",[101,461,462,464],{},[65,463,150],{"href":149}," area dust deposits",[101,466,467],{},"Hopper bridging below the bags",[101,469,470],{},"Inlet-plenum dust dropout",[86,472,131],{"id":130},[98,474,475,479,484,490,496,502],{},[101,476,477],{},[65,478,363],{"href":191},[101,480,481],{},[65,482,483],{"href":77},"Pulse-jet baghouse",[101,485,486],{},[65,487,489],{"href":488},"\u002Fglossary\u002Freverse-air-baghouse","Reverse-air baghouse",[101,491,492],{},[65,493,495],{"href":494},"\u002Fglossary\u002Fshaker-baghouse","Shaker baghouse",[101,497,498],{},[65,499,501],{"href":500},"\u002Fglossary\u002Fcompartment-isolation","Compartment isolation",[101,503,504],{},[65,505,507],{"href":506},"\u002Fglossary\u002Fsonic-horn","Sonic horn",{"title":152,"searchDepth":153,"depth":153,"links":509},[510,511,512],{"id":434,"depth":153,"text":435},{"id":450,"depth":153,"text":451},{"id":130,"depth":153,"text":131},"A baghouse is the structural enclosure that houses the bags, cages, cleaning system, tubesheet, plenums and hoppers of a fabric-filter dust collector. The word is used in both broad (\"the plant has a 12-compartment baghouse\") and narrow (\"a baghouse is the housing, the fabric filter is the system\") senses; in everyday industry practice the two terms overlap.",{},[395,516,517,518,519,520],"pulse-jet-baghouse","reverse-air-baghouse","shaker-baghouse","compartment-isolation","sonic-horn",{"title":522,"description":523},"Baghouse — vessel that houses fabric-filter bags for industrial dust control","A baghouse is the structural enclosure that holds the bags, cages, tubesheet, cleaning system and hoppers of a fabric-filter dust collector. Sized in compartments for online isolation.",[525],{"title":172,"url":173},"glossary\u002Fbaghouse","TraeRQp5lNGOrkFkwjsoYRrhIIRrMkFonwryXyc1wGw",{"id":529,"title":150,"aliases":530,"body":534,"category":158,"description":620,"extension":160,"meta":621,"navigation":162,"path":149,"relatedTerms":622,"seo":624,"sources":627,"stem":629,"term":150,"__hash__":630},"glossary\u002Fglossary\u002Ftubesheet.md",[531,532,533],"tube sheet","bag sheet","cell plate",{"type":53,"value":535,"toc":615},[536,551,555,558,561,587,591,594,596],[56,537,538,539,541,542,544,545,547,548,550],{},"The ",[60,540,166],{}," is the perforated steel plate that separates the dirty-gas and clean-gas ",[65,543,427],{"href":426}," inside a ",[65,546,158],{"href":143},". Each hole in the tubesheet corresponds to one ",[65,549,68],{"href":67},"; the bag hangs below, sealed against the hole rim by a snap-band collar at its top.",[86,552,554],{"id":553},"why-tubesheet-integrity-is-critical","Why tubesheet integrity is critical",[56,556,557],{},"The tubesheet is the structural and gas-tight boundary that prevents dirty flue gas from bypassing the bags entirely. Any failure of seal or perforation immediately admits unfiltered gas into the clean plenum and out of the stack as a particulate emission.",[56,559,560],{},"Failure modes include:",[98,562,563,569,575,581],{},[101,564,565,568],{},[60,566,567],{},"Snap-band leakage"," — bag collar improperly seated or distorted",[101,570,571,574],{},[60,572,573],{},"Hole erosion"," — fly ash gradually wearing the perforation",[101,576,577,580],{},[60,578,579],{},"Tubesheet warping"," — thermal cycling on long, lightly-supported plates",[101,582,583,586],{},[60,584,585],{},"Bag-bottom collapse"," that lifts the snap-band from the tubesheet hole",[86,588,590],{"id":589},"inspection-access","Inspection access",[56,592,593],{},"The tubesheet is inspected from above (clean side) during outages, walking on plywood mats to avoid distorting it. Any leaking bag is identified by deposits on the tubesheet top side around the affected hole.",[86,595,131],{"id":130},[98,597,598,602,606,610],{},[101,599,600],{},[65,601,144],{"href":143},[101,603,604],{},[65,605,138],{"href":67},[101,607,608],{},[65,609,47],{"href":163},[101,611,612],{},[65,613,614],{"href":426},"Plenum (clean side \u002F dirty side)",{"title":152,"searchDepth":153,"depth":153,"links":616},[617,618,619],{"id":553,"depth":153,"text":554},{"id":589,"depth":153,"text":590},{"id":130,"depth":153,"text":131},"The tubesheet is the perforated steel plate that separates the dirty-gas and clean-gas plenums inside a baghouse. Each hole in the tubesheet corresponds to one filter bag; the bag hangs below, sealed against the hole rim by a snap-band collar at its top.",{},[158,165,396,623],"plenum-clean-side-dirty-side",{"title":625,"description":626},"Tubesheet — perforated steel plate separating clean and dirty plenums","The tubesheet is the perforated steel plate that separates the clean and dirty plenums of a baghouse. Filter bags hang from holes in the tubesheet, sealed by snap-band collars.",[628],{"title":172,"url":173},"glossary\u002Ftubesheet","BqG0wsQyC3aeHKMnNW5ymH_1qVNZNu2t5EhfxvgFpJo",1782613719260]