The SYSR Scotch Yoke Spring Return Actuator is designed as an economical actuator for moderate duty control applications. The SYSR is typically utilized when applications require the control valve to fail open or closed failure mode. The SYSR incorporates a “scotch-yoke” mechanism. The SYSR can accept power supply gas up to 130 psig (896 kPa). The SYSR Actuator may be easily field configured to reverse failure mode.