Best (Stanley) D-4990 Low Energy Operator

Product Overview

The D-4990 Low Energy Operator offers Best's newest and most convenient features to gain safe access for ADA applications. Used with electric latch retraction exit devices, electric strikes and other electric locking systems. A time delay function is integrated into the control system. The D-4990 Series eliminates the need for supplemental relays or controls. The D-4990 Low Energy Operator (which incorporates the Heavy Duty D-4550 Best Door Closer) provides the industry�s widest range of field adjustable spring power settings. This allows you to adjust the operator for the correct opening and closing forces to meet any specific application. The closer within the D-4990 Low Energy Operator also incorporates multiple regulating valves, including the V-Slotted Valve Regulation, which maximizes fine tune adjustment capabilities. Includes a 3/16 horsepower, permanent-magnet DC motor.