A spring return fail close MT51.S4 actuator mounted to a 3” V-Port 150# flanged ball valve via stainless steel bracket and coupling. The PEY01 positioner proportionally moves the position of the V-Port ball based on a 4-20mA input signal, providing accurate flow control. Clean, dry air supply is critical to positioner longevity and an air filter/regulator (not shown) is highly recommended for any air powered devices or instrumentation.