The EPA Series actuators provide rugged and compact solutions for quarter-turn valve actuation. The scotch yoke design offers a high torque output while reducing maintenance requirements. The EPA actuators are constructed to offer efficient and reliable performance with reduced repairs and increased actuator life. The permanently lubricated, sliding bearings combine with a low friction, corrosion hard chrome internal coating to ensure perfect operation of the internal components while the heavy duty construction and external coating protect the actuator from corrosive environments. They have been designed with an inherently safe spring return unit that prevents the accidental release of the spring force, and ensures that installation or maintenance can be performed in complete safety.