Valiva ya solenoid ye kitundu ekifuga nga, bwe kiweebwa amaanyi mu masannyalaze oba nga kiweereddwa-, oba okuggala oba okukkiriza okukulukuta kw’amazzi. Bwe kiba nga kifunye amaanyi, ekifo kya magineeti kizimba ekisika plunger ku kikolwa ky’ensulo. Bwe de-efunye amaanyi, plunger oba pivoted armature eweebwa okudda mu kifo kyayo ekyasooka olw’ekikolwa kya spring. Actuator ekwata ekifaananyi kya magineeti y’amasannyalaze.
