Qhov kev nthuav dav ntawm foam concentrate, tseem hu ua foam expansion ratio, yog ib qho tseem ceeb ntawm qhov kev txiav txim siab ntawm kev ua npuas dej hauv kev tua hluav taws. Nws hais txog qhov sib piv ntawm qhov ntim ntawm cov npuas dej ua rau lub ntim ntawm cov npuas dej ntxiv rau hauv dej. Hauv lwm lo lus, nws ntsuas ntau npaum li cas cov npuas ua kom nthuav dav lossis nce qhov loj me thaum sib xyaw nrog dej.
Foam concentrate yog cov tshuaj tov tshuaj uas tov nrog dej los ua npuas dej, uas yog siv los tua hluav taws. Cov npuas dej ua haujlwm los ntawm smothering hluav taws thiab txiav tawm cov pa oxygen. Qhov kev nthuav dav ntawm cov npuas dej concentrate yog qhov tseem ceeb hauv kev txiav txim siab qhov txaus ntawm cov npuas dej hauv kev tua hluav taws. Yog tias qhov kev nthuav dav qis dhau lawm, cov npuas dej yuav tsis npog tag nrho thaj tsam ntawm qhov hluav taws kub lossis tej zaum yuav tsis tuab txaus los tua nws kom zoo.
Vim li no, thoob ntiaj teb cov qauv kev nyab xeeb hluav taws yuav tsum muaj qhov tsawg kawg nkaus nthuav qhov sib piv ntawm 1: 6 rau ua npuas ncauj concentrates siv hauv kev tua hluav taws. Txawm li cas los xij, ntau cov npuas dej niaj hnub no muaj qhov sib piv ntawm 1: 10 lossis siab dua, qhia tias lawv muaj txiaj ntsig zoo hauv kev tua hluav taws.
Qhov kev nthuav dav ntawm cov npuas dej concentrate yog nyob ntawm ntau yam, xws li hom ua npuas ncauj concentrate, qhov concentration ntawm cov dej ua npuas ncauj, dej kub, qhov zoo ntawm cov khoom siv cua, thiab cov txheej txheem ntawm daim ntawv thov. Nws yog ib qho tseem ceeb los xyuas kom meej tias cov npuas dej concentrate yog tov nrog dej raws li cov chaw tsim tshuaj paus cov lus qhia los tsim qhov xav tau expansion piv.
Foam concentrates tau muab faib ua ob pawg dav: protein-based foam concentrates thiab hluavtaws-based foam concentrates. Protein-based foam concentrates yog tsim los ntawm tej yam ntuj tso proteins xws li tsiaj proteins, thaum hluavtaws-based foam concentrates yog tsim los ntawm cov khoom siv hluavtaws xws li fluorosurfactants lossis cov ntaub ntawv polymeric. Ob hom ua npuas ncauj concentrates tuaj yeem ua tiav qhov kev nthuav dav siab, tab sis hluavtaws-raws li ua npuas ncauj concentrates feem ntau muaj txiaj ntsig zoo hauv kev tua hluav taws.
Hauv kev xaus, qhov kev nthuav dav ntawm cov npuas dej concentrate yog qhov tseem ceeb ntawm nws lub peev xwm los tua hluav taws. Qhov kev nthuav dav siab ua kom ntseeg tau tias cov npuas dej tuaj yeem npog tag nrho thaj tsam ntawm qhov hluav taws kub thiab ua kom nws zoo. Ua npuas ncauj concentrates nrog nthuav qhov sib piv ntawm 1:10 lossis siab dua yog suav tias muaj txiaj ntsig zoo hauv kev tua hluav taws. Nws yog ib qho tseem ceeb uas yuav tsum tau ua raws li cov chaw tsim khoom cov lus qhia thaum sib xyaw ua npuas ncauj nrog dej kom ua tiav qhov kev xav tau nthuav dav thiab ua kom nws cov txiaj ntsig zoo tshaj plaws hauv kev tua hluav taws.
