Hydraulic solenoid valves are controlling devices that control the direction of the fluid within a hydraulic system to alter its operational direction. Solenoid valves contain an electric coil wound around a ferromagnetic core at its centre. Depending of the location of the system and the attached battery and equipment solenoids are available in 12 Volt direct current (12 VDC) and 24 Volt direct current (24 VDC). At Hydraulic master we supply many different dyers of solenoids in both 12 VDC and 24 VDC.