Dwyer DDA31 is a non-spring return direct coupled actuator with a temperature range of -22 to 122°F (-30 to 50°C). It has a power requirement of 110 VAC, 24 VAC, ±10%, 50/60 Hz, single phase, with optional 230 VAC. The enclosure material housing is NEMA 2 (IP40) and the electrical connections are made through a terminal block with 18 AWG wiring. It has a power consumption of 5 VA for 110 VAC models, 3 VA for 24 VAC models, and 4 VA for DDC models. It comes with standard accessories including imitative baffles, baffle setscrews, actuator body setscrew, and an aluminum gasket. It fits shaft diameters of 0.4" (10 mm) or 0.5" (13 mm) and has overload protection with a magnetic clutch. The angle of rotation is 95° (mechanically adjustable) and it has a running time of 72 sec for 17 in-lb, 35 in-lb, and 53 in-lb, and 160 sec for 70 in-lb. It has a visual indicator for position indication and operates in both CW/CCW rotation. It has a manual override with a push button and control input of two-position floating for DDA and 4-20 mA or 0-10 VDC for DDC. It has a life expectancy of 60000 full cycles and produces sound below 45 dB.