The N1-GOV/GOA series actuators are hydraulic/gas quarter turn cylinder actuators designed for control and shut-off service. Actuator design is modular which enables an ideal configuration of central block, hydraulic/gas modules, Instrumentation & limit switch modules. Ductile cast iron central block & fabricated carbon steel hydraulic module provides rugged actuator construction.The valve remains in stay put condition if the air/oil supply is interrupted. The mounting face dimensions of the N1-GOV/GOA series actuator comply with the ISO 5211 standard.