The solenoid valve consists of: 1 electric coil, including 1 core and 1 furnace compressed into that iron core, that iron core is pressed to the end of 1 rubber gasket. Normally without electricity, the furnace presses against the iron core, to close the valve. When electricity is introduced, the magnetic coil sucks out the iron core, this magnetic field is strong enough to overcome the furnace, then the valve opens.
