(1) metering twj tso kua mis uas cov ntsiab lus:
Raws li yuav tsum ntau zaus, hov ntau ntau hom metering twj uas zoo zoo xaiv, muaj cov nram no yog ib qho tseem ceeb heev.
1) tsheb yog metered kua ntawm yuav tsum raug ntsuas.
(2) cov ntsiab cov yam ntxwv ntawm metering kua ntau xwb, xws li cov tshuaj kuj, viscosity, concentration thiab ceev.
3) lawv backpressure.
4) tsim xuas tshuab nqa.
5) lwm txoj kev thiab xav tau, xws li analog tswj, mem tes ntim tswj, ntws xyuas thiab timer.
6) tej ntawv uas muaj cov khoom.
(2) lub hom ntsiab lus thiab cov yam ntxwv ntawm metering twj:
Metering tso kua dej tag qauv hauv daim ntawv yuav raug muab faib ua piston metering twj thiab diaphragm metering twj, uas yuav muab faib ua piston zoo tib yam twj metering muaj valveless piston twj tso kua mis thiab cov twj ob; diaphragm metering tso kua rau hauv txhua yam diaphragm metering twj, hydraulic diaphragm metering twj thiab lwj metering twj. Metering twj raws li qhov tsav tsheb daim ntawv ntxiv, yuav tau muab faib ua electromagnetic metering twj tsav thiab tsav-uas tau tsav metering twj, tsis tas li, muaj cov hydraulic, tsav pneumatic drive hauv tsab ntawv ntawm ib lub twj tso kua mis metering.
1) piston metering twj: piston metering twj no faib ua ib valve twj thiab valveless twj thaum ob (daim duab 8-23). Piston metering twj vim cov qauv yooj yim thiab muaj kub thiab ntshav siab los qis, thiab lwm cov lug siv hauv lub petrochemical kev lag luam. Rau siab viscosity tawm hauv siab siab puag tsawg dua piston zoo tib yam twj A valveless teb piston metering twj uas paub ntxiv thiab xav paub ntxiv, nws lug siv hauv syrups, chocolate thiab roj additives, muaj viscosity tawm Metering ntxiv. Tau tsis tau mus cuag kiag rho tawm ntawm lub qhov nruab nrab thiab lub twj tso kua mis roj nplua nyeem no qua disadvantage, piston metering twj hauv yuav tsum muaj kuab paug rau daim ntaub ntawv ntsuas dej ntawm tus me nyuam yuav muaj kev txwv ntau.
