Group 31 Compact Valve Actuators

Group 31 compact valve actuators are designed for coupling to small quarter-turn ball and butterfly valves. The compact, in-line design consists of an output section housing the drive train and motor, and a control module section containing the electronics. Together, these two sections provide an enclosure designed to meet NEMA 4 specifications for protection against corrosion, dust, and moisture.

The Group 31 incorporates the same type of motor used in Beck’s Group 11 and Group 14 drives. It provides millisecond response to signal commands in a modulating control loop. This noburnout, non-coasting motor is capable of more than 60 starts per minute during process upsets and will remain cool and stable during operation for unparalleled on-line performance.

Group 31 compact valve actuators are engineered for direct coupling on quarter-turn ball and butterfly valves. They may also be installed using specially engineered crank arm and linkage arrangements.

Valves and drives may be ordered together as pre-engineered assemblies ready for drop-in installation. Or drives can be supplied separately along with the necessary hardware for field installation on existing valves.

Model Number	Application Type
31-M50 / 31-M30	Modulating Analog Signal
31-350 / 31-330	Modulating Direct AC
31-250 / 31-230	Open / Close