Intsimbi ehleli iivalvu zebhola, njengeI-DIN F4 yomelele ihleliIbholaivalvezibonelela ngeenzuzo ezahlukeneyo kwizicelo ezahlukeneyo.
Enye inzuzo enkulu yentsimbi ehleli iivalvu zebhola kukuqina kwazo okukhethekileyo. Isihlalo sentsimbi kunye noyilo lwebhola lubonelela ngokugqwesileyo kokuxhathisa ukunxiba kunye nokukrazula, kubenza bafanelekele ukusetyenziswa kwiimeko ezibangwayo ezinje ngamaqondo obushushu aphezulu, imidiya ebolileyo, kunye neendawo ezinobume. Oku komelela kuqinisekisa ubomi obude benkonzo kwaye kunciphisa imfuno yokutshintshwa rhoqo, ngaloo ndlela kuncitshiswe iindleko zokulondolozwa.
Ngaphaya koko, iivalvu zentsimbi ezihleli phantsi zinika amandla okutywina aphezulu. Isitywina esiqinileyo nesithembekileyo phakathi kwesihlalo sentsimbi kunye nebhola sithintela ukuvuza, nangona ngexesha lemisebenzi yoxinzelelo oluphezulu. Olu phawu lubaluleke kakhulu kumashishini afana ne-oyile negesi, i-petrochemical, kunye nokusetyenzwa kweekhemikhali, apho ukuthintela ukuvuza kubalulekile kukhuseleko kunye nokhuseleko lokusingqongileyo.
Enye inzuzo enkulu yentsimbi ehleli iivalvu zebhola kukuqina kwazo okukhethekileyo. Isihlalo sentsimbi kunye noyilo lwebhola lubonelela ngokugqwesileyo kokuxhathisa ukunxiba kunye nokukrazula, kubenza bafanelekele ukusetyenziswa kwiimeko ezibangwayo ezinje ngamaqondo obushushu aphezulu, imidiya ebolileyo, kunye neendawo ezinobume. Oku komelela kuqinisekisa ubomi obude benkonzo kwaye kunciphisa imfuno yokutshintshwa rhoqo, ngaloo ndlela kuncitshiswe iindleko zokulondolozwa.
Ngaphaya koko, iivalvu zentsimbi ezihleli phantsi zinika amandla okutywina aphezulu. Isitywina esiqinileyo nesithembekileyo phakathi kwesihlalo sentsimbi kunye nebhola sithintela ukuvuza, nangona ngexesha lemisebenzi yoxinzelelo oluphezulu. Olu phawu lubaluleke kakhulu kumashishini afana ne-oyile negesi, i-petrochemical, kunye nokusetyenzwa kweekhemikhali, apho ukuthintela ukuvuza kubalulekile kukhuseleko kunye nokhuseleko lokusingqongileyo.