Yintoni ivalvu?
Ivalvu, kubunjineli bemishini, isixhobo sokulawula ukuhamba kolwelo (ulwelo, iigesi, i-slurry) kumbhobho okanye kwenye indawo evalekileyo. Ulawulo lusebenzisa into eshukumayo evula, ivale, okanye ivale kancinci umngxuma kwindlela. Iivalvu zeentlobo ezisixhenxe eziphambili: iglobhu, isango, inaliti, iplagi (iqhude), ibhabhathane, ipoppet, kunye nespool.

Zisebenza njani iivalvu?
Ivalvu sisixhobo esisebenza ngomatshini esivala umbhobho nokuba siwuvala kancinci okanye ngokupheleleyo ukuze sitshintshe ubungakanani bolwelo oludlula kuwo.

Zisetyenziswa phi iivalvu zokulawula impahla?
Ivalvu yokulawula yivalvu esetyenziselwa ukulawula ukuhamba kolwelo ngokutshintsha ubungakanani bokuhamba kolwelo njengoko kuyalelwe sisibonakaliso esivela kumlawuli. Oku kwenza kube lula ukulawula ngokuthe ngqo isantya sokuhamba kolwelo kunye nolawulo olulandelanayo lobungakanani benkqubo efana noxinzelelo, ubushushu, kunye nenqanaba lolwelo.

Ziziphi iintlobo ezahlukeneyo zeevalvu?
Iindidi ezahlukeneyo zeevalvu ziyafumaneka: isango, iglobhu, iplagi, ibhola, ibhabhathane, itshekhi, idiaphragm, ukucinezela, ukukhulula uxinzelelo, iivalvu zokulawula njl. Uhlobo ngalunye kwezi luneemodeli ezininzi, nganye ineempawu ezahlukeneyo kunye nezakhono zokusebenza.

Zeziphi iintlobo ezahlukeneyo zeevalvu ezisetyenziselwa zona?
Iivalvu zeplagi (iivalvu zesihlalo), iivalvu zebhola, kunye neevalvu zebhabhathane zezona ntlobo zixhaphakileyo zeevalvu ezisetyenziswa kwinkqubo yokufudumeza, yokungenisa umoya, kunye neyomoya opholileyo. Ezinye iivalvu ezisetyenziswa kwinkqubo ziquka iivalvu zesango lemela, iivalvu zediaphragm, kunye neevalvu zesango.

Iintlobo ezahlukeneyo zeevalvu ezisetyenziswa kumacandelo ahlukeneyo. Kweli nqaku kukhankanyiwe iintlobo ezili-19 zeevalvu.
1. Ivalvu yeglobhu
2. Ivalvu yesango
3. Ivalvu yebhola
4. Ivalvu yebhabhathane
5. Ivalvu ye-diaphragm
6. Ivalvu yeplagi
7. Ivalvu yenaliti
8. Ivalvu ye-engile
9. Ivalvu yokuncina
10. Ivalvu yesilayidi
11. Ivalvu esezantsi yokuhlamba
12. Ivalvu yeSolenoid
13. Ivalvu yoLawulo
14. Ivalvu elawula ukuhamba kwamanzi
15. Ivalvu yokulawula uxinzelelo lomqolo
16. Ivalvu yohlobo lwe-Y
17. Ivalvu yepiston
18. Ivalvu yokulawula uxinzelelo
19. Ivalvu yokujonga