The DMA actuator drives from 0° to 90° via a 4 to 20 mA input signal. It can move in any direction and stop anywhere over the entire 90° stroke. The field adjustable stroke is factory set at 90° and the position is factory set at 0°.
The DMA is available in three different set speeds: 6 s, 12 s or 30 s. The DMA has one independent, field adjustable auxiliary SPDT switch and two field adjustable limit switches.
During power interruption, the acutator will remain stationary. After power is restored, the position is determined by the controller input signal. However, if the 4 to 20 mA signal is interrupted and the DMA is still powered, the actuator will
drive fully CW (towards 0°), which will
4 to 20 mA feedback can be used to drive a slave motor (3 actuators maximum in parallel).
Maximum stroke (Y max; span) is adjustable from 25° to 90°, and minimum stroke (Y min; zero) is adjustable from 0° to 75% of the set span (maximum stroke).
When mounted on the DMK butterfly control valve, the DMA is used to automatically modulate the amount of natural
gas, butane, propane and/or air supplied to the burner.
DUNGS is a synonym for safe and clean gas combustion. In close cooperation with our clients we develop and manufacture innovative system solutions for the thermal and process heating industry and gas engines. Innovations are not an end in themselves for us. They have to meet the requirements and offer a direct added value. We are a valuable original equipment manufacturer for producers of atmospheric and forced draught burners, condensing boilers, premix burners, gas engines and industrial process installations.