TAYO SARE FKM/FPM/VITON ORING MAT DULL DHAMMAAN PTFE LA'AAN PFAS
TAYO SARE FKM/FPM/VITON ORING MAT DULL DHAMMAAN PTFE LA'AAN PFAS
Codsiyada O-Rings ee Dahaarka leh ee PTFE
Aegis, Aflas, Butyl, Fluorosilicone, Hypalon ama wax kasta oo ka kooban codsigaaga gaarka ah ayaa laga yaabaa inuu u baahdo.O-ringings dahaarka leh iyo kuwa la duubay ayaa ah ikhtiyaar kale sidoo kale:
- Dahaarka leh ama la daboolay - O-ringings dahaarka leh ayaa dahaaran PTFE, oo daahanku ku dheggan yahay O-Ring (sida caadiga ah Silikoon ama Viton ama NBR).O-rings-ku-xiran waa O-ring (sida badan Silikoon ama Viton) oo lagu daboolay tuubo PTFE.Daahan PTFE ee O-Rings waa dahaarka hoose ee ugu fiican halkaasoo dabacsanaanta hawlgalku ay tahay tixgalin weyn.O-Ring-ka daboolan wuxuu u dhaqmaa sida dareere viscous sare leh, cadaadis kasta oo shaabada ku yaal waxaa lagu kala qaadaa dhammaan jihooyinka.O-ringings dahaarka leh ayaa lagu heli karaa midabyo kala duwan.
- Iskudhisyada gaarka ah ee alaabta - Haddii aad leedahay shuruudo xarun gaar ah oo aan ahayn heerka caadiga ah ee warshadaha, waxaan la shaqeyn karnaa soo saarayaasha si ay u soo saaraan xarun gaar ah si loo daboolo baahiyahaaga.
- Mil-Spec, Mil-Std ama Milspecs waa heerka difaaca Mareykanka ee loo isticmaalo in lagu gaaro ujeedooyinka halbeega ee Wasaaradda Difaaca Mareykanka.Gantaallo Seals waxay ka heli karaan Mil-Spec kasta iyada oo loo marayo shabakadeena weyn ee alaab-qeybiyeyaal sumcad leh.
- Qalabka heerka cuntada ee FDA, calaamado shisheeye, USP, KTW, DVGW, BAM, WRAS (WRC), NSF, Underwriters Laboratories (UL), Aerospace (AMS) iyo Mil-Spec - Rocket wuxuu khibrad u leeyahay buuxinta baahiyahaaga dhammaan heerarka warshadaha.
waxaad dooran kartaa midabka soo socda ama midab kale oo dheeraad ah.
Si fiican loogu yaqaan magaca sumadda Teflon, polytetrafluoroethylene (PTFE) waxay siisaa dusha aan dhegta lahayn ee qalabka wax lagu karsado, cidiyaha cidiyaha, qalabka habaynta timaha, daawaynta dharka/roogaga, iyo masaxarada muraayadaha hore.Si kastaba ha ahaatee, soosaarayaashu waxay arkayaan faa'iidooyin korodhay isticmaalka PTFE si ay u soo saaraan tayada O-rings.O-ringsla dhisay iyadoo la isticmaalayo PTFE waxay bixisaa kulayl iyo kiimiko heer sare ah, waxayna sidoo kale iska caabin karaan is-jiidhka iyo biyaha.
PTFE VERSUS TEFLON
Inkasta oo ay ku kala duwan yihiin calaamadaynta, PTFE iyo Teflon waxay wadaagaan asal iyo hanti guud.
PTFE
PTFE waa polymer synthetic ah oo ka soo jeeda isku xidhka kiimikaad ee u dhexeeya kaarboon iyo fluorine, iyada oo ka faa'iidaysanaysa xagjiriinta xorta ah ee u janjeera inay ku sameeyaan tetrafluoroethylene.Maaddadan ayaa si lama filaan ah loo helay sannadkii 1938-kii, markii Chemist DuPont Roy J. Plunkett uu isku dayay inuu sameeyo nooc cusub oo qaboojiye ah, oo uu isku daray agabkan isagoo aan ogeyn falcelinta ay keeni karto.
TEFLON
Kiimikooyinka Kinetic, oo ah shirkad shuraako ah oo ka dhaxaysa DuPont iyo General Motors, oo ku calaamadsan PTFE oo hoos timaada magaca astaanta Teflon ee 1945. Nuxur ahaan, Teflon waa PTFE.Si kastaba ha ahaatee, PTFE sidoo kale waxaa lagu heli karaa noocyo kala duwan oo magacyo kale ah, sida:
- Daikin-Polyflon
- Fluon
- Dyneon
HANTIDA
Dhowr guri ayaa PTFE ka sooca walxaha kale, oo ay ku jiraan:
- Isku-dhafan hooseeya: PTFE waxay leedahay isku-dhafka saddexaad ee ugu hooseeya ee walax kasta oo loo yaqaan aadanaha, taasoo la macno ah inay run ahaantii tahay
- Hawlaha heerkulka ugu sarreeya: Lagu qiimeeyay 600 K, PTFE waxay dhalaalisaa 327ºC ama 620ºF, waxayna sidoo kale si fiican u shaqeysaa heerkul hooseeya sida -268ºC ama -450ºF.
- Waxay ka hortagtaa biyaha: Biyaha ayaa kor u qaada dusha sare ee PTFE, taasoo la macno ah in sagxadaha lagu daweeyay maaddadan ay iska caabiyaan oksaydhka.
- Aan fal-celin lahayn: PTFE kama falceliso badi maaddooyinka daxalka ah, taas oo ka dhigaysa mid ku habboon in loo isticmaalo tuubooyinka, baallooyinka, shaabadihii, iyo O-rings.
Kala duwanaanta heerkulka sare ee PTFE
Heerkulka heerkulka (-1,000F ilaa +4,000F), dhaqdhaqaaq la'aanta, iska caabinta biyaha, iyo sifooyinka hoose ee PTFE ayaa ka dhigaya wax ku habboon in la dhiso O-rings si loogu isticmaalo codsiyo kala duwan oo kala duwan.Guryahaan ayaa ka dhigaya PTFE O-rings doorasho ku habboon codsiyada u adkeysiga cimilada iyo sidoo kale codsiyada ku lug leh korantada iyo kuleylka kuleylka.
Cufnaanta ay leeyihiin awgeed.PTFE O-ringsmaaha kuwo "dhalan-qaabaysan" -halkii, waa la miiray oo la miiray si ay u bixiyaan qaabka lagama maarmaanka ah.
TEFLON/PTFE SEALS
O-ringska samaysan PTFE waxay ku jiraan noocyo kala duwan oo codsiyo warshadeed ah oo u baahan shaabado u adkeysan kara dhibaato.PTFE O-rings waxay ka muuqdaan codsiyo badan kuwaas oo la kulmay arrimahan halista ah:
| Codsiyada ugu sarreeya | Daciifnimada makaanikada |
|---|---|
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Warshadeenu waxay isticmaashaa kuwan soo socda si ay u caajiso dhammaan gogosha oring:
