Valworx air actuated 3-piece stainless steel ball valves with swing out design for easy maintenance. All 316 stainless steel construction including valve body and ball and actuator body, pistons and output drive. Typically used for On/Off control in applications requiring superior corrosion resistance. Spring return air actuators use air pressure to open the valve and springs (failsafe) to close the valve. Double acting air actuators use air pressure to open the valve and air pressure to close the valve. Built. Tested. Shipped. Same Day.