The 21IA4T15GC is a 2-way angle seat air operated valve that is capable of providing high flow rates. Its body has been constructed out of stainless steel and it features a corrosion resistant actuator that can be rotated up to 360 degrees. The self-adjusting internal seals give the device a prolonged life. The integration of a solenoid pilot would make electrical operation easier. It also has an optical position indicator and can be converted from N.C. to N.O. or double acting.