1. Iimpawu zesakhiwo
Kukho umahluko ocacileyo phakathi kwevalvu yebhabhathane yodidi A kunye nevalvu yebhabhathane yodidi B ngokwesakhiwo.
1.1 Udidi A iivalvu zebhabhathane ziluhlobo "oluxinzelelweyo", zihlala zinesakhiwo esilula, esiquka umzimba wevalvu, idiski yevalvu, isihlalo sevalvu, umngxuma wevalvu kunye nesixhobo sokudlulisa. Idiski yevalvu imilo njengediski kwaye ijikeleza umngxuma wevalvu ukulawula ukuhamba kolwelo.
1.2 Ngokwahlukileyo koko, iivalvu zebhabhathane zodidi B ziluhlobo "lokuchasene", oko kuthetha ukuba ishaft ithintelwe kwidiski, zintsonkothile ngakumbi kwaye zinokuba nezitywino ezongezelelweyo, izixhasi, okanye ezinye izinto ezisebenzayo ukubonelela ngokusebenza okukhulu kokutywina kunye nokuzinza.
2. Aizicelo kwiimeko ezahlukeneyo zokusebenza
Ngenxa yokwahluka kwendlela eyakhiwe ngayo, ivalvu yebhabhathane yodidi A kunye nevalvu yebhabhathane yodidi B nazo ziyasetyenziswa kwiimeko ezahlukeneyo zokusebenza.
2.1 Iivalvu zebhabhathane zodidi A zisetyenziswa kakhulu kwinkqubo yemibhobho enoxinzelelo oluphantsi, enobubanzi obukhulu, efana nokukhupha amanzi, umoya kunye neminye imimandla, ngenxa yesakhiwo sayo esilula, ubungakanani obuncinci, ubunzima obuphantsi kunye nezinye iimpawu.
2.2 Ivalvu yebhabhathane yodidi B ifanelekile ngakumbi kwisicelo sokusebenza esineemfuno eziphezulu zokusebenza kokutywina kunye noxinzelelo olukhulu oluphakathi, olufana neekhemikhali, ipetroli, igesi yendalo kunye neminye imimandla.
3. Uthelekiso lwenzuzo yokusebenza
3.1 Ukusebenza kokutywina: iivalvu zebhabhathane zodidi B ngokubanzi zingcono kuneevalvu zebhabhathane zodidi A ekusebenzeni kokutywina, ngenxa yesakhiwo sazo esintsonkothileyo kunye noyilo olongezelelweyo lokutywina. Oku kwenza ivalvu yebhabhathane yodidi B ikwazi ukugcina isiphumo esihle sokutywina kwiindawo ezinzima ezifana noxinzelelo oluphezulu kunye nobushushu obuphezulu.
3.2 Umthamo wokuhamba kwamanzi: Umthamo wokuhamba kwamanzi kwivalvu yebhabhathane yodidi A unamandla, kuba uyilo lwediski yevalvu lulula, ukumelana kokuhamba kolwelo kuncinci. Ivalvu yebhabhathane yodidi B inokuchaphazela ukusebenza kakuhle kokuhamba kwamanzi ukuya kuthi ga kwinqanaba elithile ngenxa yesakhiwo sayo esintsonkothileyo.
3.3 Ukuqina: Ukuqina kweevalvu zebhabhathane zodidi B kudla ngokuba phezulu, kuba uyilo lwesakhiwo kunye nokukhethwa kwezinto ezisetyenziswayo kunikela ingqalelo engakumbi kuzinzo lwexesha elide kunye nokumelana nokugqwala. Nangona ivalvu yebhabhathane yodidi A ilula ngesakhiwo, inokuba sesichengeni sokutshatyalaliswa kwiindawo ezithile ezinzima.
4. Amanyathelo okuthintela ukuthenga
Xa uthenga iivalvu zebhabhathane zodidi A kunye nodidi B, kufuneka kuqwalaselwe ezi zinto zilandelayo:
4.1 Iimeko zokusebenza: Khetha udidi olufanelekileyo lwevalvu yebhabhathane ngokwengcinezelo yokusebenza kwayo, ubushushu, umgangatho ophakathi kunye nezinye iimeko zenkqubo yemibhobho. Umzekelo, iivalvu zebhabhathane zodidi B kufuneka zinikwe ingqalelo kwiindawo ezinoxinzelelo oluphezulu kunye nobushushu obuphezulu.
4.2 Iimfuneko zokusebenza: Iimfuneko zokusebenza ezicacileyo, ezinje ngokufunekayo ukuze kuvulwe kwaye kuvalwe ngokukhawuleza, ukusebenza rhoqo njl.njl., ukukhetha isakhiwo sevalvu yebhabhathane esifanelekileyo kunye nendlela yokudlulisela.
4.3 Uqoqosho: Phantsi kwengcamango yokuhlangabezana neemfuno zokusebenza, cinga ngoqoqosho lwevalvu yebhabhathane, kuquka iindleko zokuthenga, iindleko zokulungisa, njl.njl., iivalvu zebhabhathane zodidi A zihlala ziphantsi ngexabiso, ngelixa iivalvu zebhabhathane zodidi B, nangona zisebenza ngcono, zinokuba nexabiso eliphezulu.