Ol 2-pela posisen o 2-pela rot Solenoid Valves i save pas, dairek ekting solenoid valv na i no nidim wanpela minimam diferensel presa long operet{{2} olsem i stap long piksa daunbilo, taim koil i no gat strong (lephan daigram), siling bilong planger i stap long bikpela orifisen na em i holim valv bilong planger i stap long ples bilong lip lunge na em i holim em i stap long ples bilong en long plaija spring fos. i gat strong (raet daegram), solenoid i leftemap plunja mo i letem wok medium i ron tru long orifis. Wok medium mo flow daereksen oli soem long pepol long daegram.
