AAA Sales & Engineering: Piston Retarders

Model 108U Controllable Piston Retarder

The model108U is another new kind of speed control developed for the North American Railroad industry. The electro control valve automatically controls the retarder so as to control the speed of the car. The retardation or non-retardation to the car is not only based on the speed but also the weight of the car.

Technical Data for 801U
Item	Stardard	Metric
Critical Speed	3 – 9 Miles/h	4.8 – 14.4 km/h
Braking Energy	> 1069.2 ft lbs	1450 J
Idiling Resistance	<36.9 ft lbs	< 50 J
Installing Angle	13"	13°
Structure Speed	15.6 Miles/h	25 km/h
Height for Installation	2.4 in	61 mm
Maximum Operating Stroke	3.937 in	100mm
Operating Medium	10# aeronautic hydraulic oil
Weight	39.68 lbs	18kg
Ambient Temp.	-58°F – 122°F	18 kg
Operating Voltage	40VDC
Power Consumption	6 Watts
Operation Time (continuaously)	25 min