Plast-O-Matic ABRA Series air actuated ball valves control the flow of fluids in gas transfer, chemical processing and wastewater treatment applications. They feature plastic construction to handle corrosive environments. These valves are hydraulically operated units. However, they also have manual override capability. These ball valves require a 4-way air solenoid valve to control actuation. They are lightweight and reduce piping stresses. These Plast-O-Matic ball valves consist of a ball with a hole through its centre. This ball rotates to allow or prevent fluid flow. The ball is then connected to a stem that is moved (actuated) by moving air.