Import Buyer's Guide: Yuav Ua Li Cas Pom Siab -Quality HEPA Media Ua ntej koj tso PO

Rau qhov tseeb HEPA lim, kev ua tau zoo yog txhais los ntawmTS EN 1822 / ISO 29463kev faib-raws li kev ua tau zoo ntawm covFeem ntau Penetrating Particle Size (MPPS). MPPS tsis yog kab lus lag luam. Nws yog lub ntsiab lus uas cov xov xwm nyuaj tshaj plaws los lim, thiab nws yog qhov tseeb HEPA qib tau pov thawj.

Cov neeg yuav khoom feem ntau nug txogfiberglass vs PP HEPA mediavim lawv tau muab ob qho tib si. Hauv kev xyaum, feem ntau classic H13 / H14 HEPA lim sivmicroglass (fiberglass) media. Qee tus neeg muag khoom kuj tseem muaj cov kev xaiv hluavtaws ua nyob ib puag ncig PP lossis cov qauv sib xyaw rau cov kev siv tshwj xeeb. Qhov kev xaiv zoo yog nyob ntawm daim ntawv thov - thiab qhov zoo nyob ntawm qhov tseeb hauv lub vev xaib.

Dab tsi microglass (fiberglass) HEPA media yuav tsum zoo li

Raws li kev nthuav dav (txawm tias ib qho yooj yim 50 × - 200 × scope), zoo microglass media feem ntau qhia:

Ib tug tuab network ntawmzoo heev, randomly oriented fibers

Uniform kev faib tawmtsis pom tseeb "thin kab"

Tsis muaj pawg uas tsim cov pob tawv tawv (tuaj yeem tawg thaum pleated)

Cov qauv huv si nrog tus cwj pwm zoo sib xws (tsis yog glossy thaj ua rau thaj lossis xoob plua plav)

Cov chij liab:

Pom tau "qhov" los yog lub teeb - qhov chaw tawm thaum rov qab

Fiber clumping uas tsim tsis ncaj airflow txoj kev

Brittle hnov ​​los yog ntug shedding uas yuav zuj zus tom qab tuav

PP media (feem ntau meltblown los yog cov khoom siv sib xyaw) yuav qhia tau tias:

Ntauuniform fiber txoj kab uas hlazoo li iav

Ib qho txawv "web texture" thiab feem ntau softer tes xav

Hauv qee qhov qauv tsim, txheej txheej txheej lossis cov qauv sib xyaw tsis yog ib lub vev xaib sib xws

Cov chij liab:

Tsis sib haum web thickness hla lub yob

Electrostatic "kev thov kev ua haujlwm" tsis muaj cov ntaub ntawv MPPS ruaj khov

Media uas sib tsoo los yog deforms thaum pleated los yog thaum raug cov av noo / kub viav vias

MPPS (Feem ntau Penetrating Particle Size)yog qhov loj me me qhov twg cov lim xov xwm muaj nws qhov kev ntes qis tshaj plaws. Nws feem ntau yog nyob rau hauv sub-micron ntau thiab sib txawv nrog cov qauv xov xwm thiab lub ntsej muag nrawm.

Vim li cas MPPS tseem ceeb:

Qib HEPA (H13/H14) raug cais ntawm MPPS hauv qabTS EN 1822 / ISO 29463

Ib daim ntawv xov xwm yob tuaj yeem zoo li "zoo" thiab tseem tsis tuaj yeem tuav ruaj khov MPPS kev ua tau zoo ntau -rau- ntau

Yog tias MPPS kev ua tau zoo tsis sib xws, koj cov ntxaij lim dej ua tiav yuav ua tsis tiav -tshwj xeeb tshaj yog nyob rau hauv qhov kev xeem xau/scan

Yam koj yuav tsum tau thov los ntawm tus neeg muag khoom:

Cov txheej txheem lawv tsim rau (TS EN 1822 / ISO 29463rau HEPA)

MPPS-cov ntaub ntawv hais txog kev ua tau zoo rau cov lim tiav (thiab siv txoj kev sim twg)

Resistance/Pressure Drop at rated airflow (vim kev ua tau zoo yam tsis muaj kev tiv thaiv tsis tiav)

Nov yog kev yuav khoom -npaj daim ntawv tshuaj ntsuam uas ntes cov teeb meem zoo tshaj plaws thaum ntxov.

1) Cov ntaub ntawv xa tuaj (tsis txhob hla qhov no)

Nug rau:

Ntau / batch traceability rau cov xov xwm yob

COA rau txhua yob (cov khoom tseem ceeb ntawm lub cev + cov lus qhia sib xws)

Cov ntaub ntawv tshaj tawm yog tias koj qhov project xav tau nws

Nrhiav:

Clear ntau tus lej uas phim cov ntawv yob

Cov xwm txheej xeem sib xws (tsis yog qhov tsis meej "dhau" nqe lus)

2) Visual + backlight soj ntsuam (ceev, pheej yig, zoo)

Yuav ua li cas:

Unroll ib ntu luv hauv qab lub teeb muaj zog

Saib rau "thin me ntsis," pinholes, streaks, ntug kev puas tsuaj

Cov chij liab:

Lub teeb- cov kab tawm raws cov npoo npoo

Random nyias thaj ua rau thaj (feem ntau dhau los ua txoj hauv kev tom qab pleating)

Cov kab mob sib kis tau muab tso rau hauv lub vev xaib

3) Microscopic check (yooj yim, nthuav tawm heev)

Koj tsis xav tau ib lub lab. Ib qho yooj yim Scope yog txaus los txheeb xyuas:

Fiber faib uniformity

Plumping, binder pooling, los yog tawg fibers

Qhov chaw defects uas cuam tshuam nrog kev ua tsis tiav

4) Kev kuaj xyuas lub cev yooj yim uas kwv yees ua tiav pleating

Thickness sib xws ntawm yob dav

Tensile zog / kua muag nyiam (tshwj xeeb tshaj yog ntawm ntug)

Kev coj tus cwj pwm (puas puas tawg thaum folded? nws puas?)

5) Kev tshuaj ntsuam tsis kam (Nyob rau hauv paus)

Txawm hais tias ua ntej tag nrho HEPA kuaj, kev tshuaj ntsuam xyuas ntawm lub ntsej muag lub ntsej muag txhais tau pab tshawb pom:

Tshaj - cov xov xwm ntom ntom uas ua rau kiv cua zog

Inconsistent permeability thoob plaws yob

Yog tias koj tab tom nrhiav HEPA lim lossis media-raws li kev sib dhos, xa qhov no:

Hom phiaj qib:H13 los yog H14(Thiab tus qauv twg koj qhov project references: EN 1822 / ISO 29463)

Daim ntawv thov: huv chav davhlau ya nyob twg / vaj tse / AHU theem kawg

Airflow thiab loj yuav tsum tau

Kev lees txais thawj zaug (Pressure Drop) ntau yam ntawm cov ntsuas cua

Cov ntaub ntawv yuav tsum tau muaj: COA, traceability, scan/leak test expectation (yog rau cov lim tiav)

Ib puag ncig tej yam kev mob: vaum swings, kub, tshuaj raug

Tus neeg muag khoom tsuas yog muag "HEPA 99.97% @ 0.3 µm" tsis muaj MPPS lossis cov ntsiab lus txheem

Tsis muaj ntau traceability rau media

Tsis muaj kev qhia meej txog yuav ua li cas xov xwm raug tshuaj xyuas ua ntej tsim khoom

"Tib spec, sib txawv yob" (tsis sib haum los yog tuab)

Tus nqi qis qis tsis tau piav qhia qhov chaw tshaj tawm thiab QC txoj kev

CTA: Koj puas xav tau ib pob qauv thiab QC daim ntawv txheeb xyuas koj tuaj yeem siv sab hauv?

Yog koj npaj yuavimport cua lim los ntawm Tuam Tshojthiab xav kom tsawg surprises, hu rau peb rau ib tug quote los yog ib tug catalog pob. Peb kuj tseem tuaj yeem sib koom kev yuav khoom-npaj daim ntawv tshuaj xyuas (kev tswj hwm ntau tshaj tawm + cov ntawv pov thawj tiav) ua raws li HEPA cov haujlwm tau tshuaj xyuas tiag tiag.

Factory ncaj qha. Kev them nyiaj yug OEM / ODM. Lub sij hawm ua cov hmoov txhuas ceev -tsis muaj kev lag luam- tuam txhab kos npe.