Kev xaiv cov khoom siv foob rau lub pob valve yog qhov tseem ceeb rau nws txoj haujlwm ua tiav.Hauv cov ntawv tshaj tawm no, peb yuav los saib qee yam ntawm cov yam ntxwv tseem ceeb ntawm rau feem ntau siv cov kev xaiv rau polymer seals hauv pob li qub.
Nov yog qee qhov kev tshaj tawm ntxiv ntawm Polymer Seats thiab Sealing Solutions:
- Pob Valve rooj zaum - 9 Qhov tseem ceeb yuav khoom xaiv
- Advanced EMC Technologies High Performance Sealing Solutions Guide
- PTFE Rotary Dip Seals – 6 Tus Neeg Sib Tw Ntaus Tsis Xav Kom Koj Paub!
Khoom tseem ceeb #1:PTFE nkauj xwb
Virgin PTFE (lub npe lag luam polymer) yog qhov zoo tshaj plaws raws li lub pob valve foob cov khoom siv rau qhov siab tshaj 5 ksi thiab kub ntawm -20 F thiab 400 F;Txawm li cas los xij, nws qhov kub thiab txias ua haujlwm nyob ntawm qhov siab.Hais txog lub siab, PTFE tsis decompress zoo tom qab raug pressurized.Nco ntsoov tias cov khoom siv polymer tsis ua haujlwm zoo thaum muaj qhov kub thiab txias ntau dua 167 F. Ib qho ntawm nws qhov muaj zog tshaj plaws yog cov tshuaj tiv thaiv, nyob ze rau insoluble;lwm lub zog yog tsis tshua muaj kev sib txhuam.Nws kuj yog hluav taws kub.
Khoom tseem ceeb #2:iav Reinforced PTFE
Reinforced PTFE raws li siv nyob rau hauv pob valve ntsaws ruaj ruaj yog feem ntau 15% iav fiber ntau, nce qhov kub thiab siab ntsuas muaj nrog PTFE nkauj xwb.Zoo li unreinforced polymer, iav reinforced PTFE tseem muaj tshuaj tiv thaiv zoo heev nrog rau kev zam ntawm kub caustics thiab hydroflourics.Nws, ib yam nkaus, yog hluav taws kub resistant thiab muaj kev sib txhuam tsawg, tab sis tsis tsawg li nkauj xwb PTFE.
Khoom tseem ceeb #3:Stainless hlau Reinforced PTFE
Muaj lwm daim ntawv ntawm PTFE reinforced uas yog siv nyob rau hauv pob valve seals: stainless hlau reinforced PTFE.Cov khoom sib txuas no yog ua los ntawm 50% polymer thiab 50% hmoov 316 stainless hlau.Nws qhov kub thiab txias yog -20 F txog 550 F (me ntsis siab dua li nkauj xwb PTFE) thiab nws muaj peev xwm siab dua li cov nkauj xwb los yog iav fiber reinforced PTFE.Nws, ib yam nkaus, yog hluav taws resistant, tab sis nws coefficient ntawm kev sib txhuam yog siab tshaj PTFE.
Khoom tseem ceeb #4:PEB
PEEK yog ib qho kev xaiv thaum qhov yuav tsum tau pw sab nraum qhov kub ntawm PTFE.PEEK ua haujlwm zoo nyob rau hauv ib puag ncig nrog qhov kub thiab txias ntawm -70 F txog 600 F, thiab tsis cuam tshuam los ntawm kev cuam tshuam tas mus li rau chav thiab dej kub.Nws yog tawv dua li polymer, tab sis kuj nyuaj.Nws qhov teeb meem loj, dhau ntawm nws qhov nruj, yog nws tus cwj pwm nkig ntawm qhov kub qis.
Khoom tseem ceeb #5:UMHW Polyethylene
UHMW Polyethylene zoo li yog kev xaiv rau kev siv tshwj xeeb, nrog rau cov uas yuav muaj hluav taws xob tsawg mus rau nruab nrab.Nws qhov ntsuas siab yog 1.5 ksi thiab nws qhov kub thiab txias yog -70 F txog 200 F 1500 psi -57C txog 93C.UHMW Polyethylene kuj tseem muaj kev puas tsuaj zoo heev.
Khoom tseem ceeb #6:Chlorinated Polyether
Chlorinated polyether yog qee zaum siv los ua lub pob valve foob cov khoom, ua haujlwm ntawm qhov kub txog li 257 F. Nws ua haujlwm zoo thaum muaj cov kua qaub thiab cov kuab tshuaj yog tias softening tuaj yeem zam tau, thiab tiv taus ntau tshaj 300 chemicals.Nws tsis nkag mus, thiab tsis nyiam nqus dej.
Seals Continually Evolving:
Cov ntaub ntawv foob yog ib qho kev hloov pauv mus tas li, tab sis rau cov ntaub ntawv no zoo li yog cov kev sib tw rau cov kev xaiv thermoplastic pob valve.Lawv cov yam ntxwv tseem ceeb zoo li lub siab thiab kub ua haujlwm, tsis muaj kev sib txhuam, tshuaj lom neeg tsis kam.
Hot Tags: polymer ptfe, uhmw, pob valve seals
Post lub sij hawm: Jul-10-2018