1.obutereevu-obuuma obukola .
Solenoyidi zino zirina koyilo eggulawo vvaalu mu kikolwa obutereevu, ekivaako ekikondo n’entebe ya vvaalu okukyuka. Direct-acting solenoid valves zikozesa amaanyi agakolebwa magnetic field ya solenoid okukola valve. Amasannyalaze bwe gaggyibwawo, sseppulingi ey’ebyuma ezzaayo vvaalu mu kifo we yasookera.
2.pilot-Valiva eziddukanyizibwa .
Mu pilot-adduka valve, plunger eggulawo pilot opening ate pressure ereetera valve okugguka n'okuggalawo. Wadde nga Pilot-Vavulu eziddukanyizibwa zeetaaga amaanyi matono okukola, zeetaaga okukuuma amaanyi amajjuvu n’ekigendererwa ekigere ekigere okusigala mu mbeera enzigule, era zikola ku sipiidi empola okusinga obutereevu-okukola solenoids. Direct-acting valves just need full power nga ziggulawo valve, nga zisobola okukwata ekifo kyazo ekikalu wadde nga zikola ku maanyi amatono.
3.Bbiri-Valiva z'amakubo .
Kino kye kika kya vvaalu ya solenoid esinga okumanyibwa. Valiva bbiri- zirina emikutu ebiri, nga gino gikozesebwa mu ngeri ekyukakyuka okusobozesa okukulukuta nga kwotadde n’okugiggalawo. Valiva y'ekkubo bbiri-eyinza "okugguka mu budde obwabulijjo" oba "okuggalwa kwa bulijjo" mu nkola yaayo. Nga vvaalu eggule mu budde obwa bulijjo, vvaalu esigala nga nzigule okutuusa nga akasannyalazo kassiddwaako okuggalawo vvaalu. Amasannyalaze bwe gayimirizibwa, vvaalu eggulwawo mu mbeera yaayo eya bulijjo mu ngeri ey’otoma. Valiva ya solenoid eya bulijjo eggaddwa esigala nga nzigale okutuusa ng’ensibuko y’amasannyalaze agireetera okugguka.
