714-11-16830 Wheel Loader Solenoid Valve WA250 WA320 Solenoid valves are used in fluid power pneumatic and hydraulic systems to control air cylinders, hydraulic drive motors or larger industrial valves. Automatic irrigation sprinkler systems also utilize solenoid valves and automatic controllers. Domestic washing machines and dishwashers use solenoid valves to control the entry of water into the machine.