Example: barber
Actuators and controls
Found 2 free book(s)
Wiring for Damper Actuators and Control Valves
www.belimo.comactuators are connected to the hotleg. Mixing wire No. 1 & 2 on one leg of the transformer will result in erratic operation or failure of the actuator and/or controls. Multiple actuators, multiple transformers Multiple actuators positioned by the same control signal may be powered from multiple transformers provided the following rules are ...
ENGINEERING SYMBOLOGY, PRINTS, AND DRAWINGS …
sites.ntc.doe.govValve Actuators Some valves are provided with actuators to allow remote operation, to increase mechanical advantage, or both. Figure 2 shows the symbols for the common valve actuators. Note that although each is shown attached to a gate valve, an actuator can be attached to any type of valve body. If no actuator is shown on a valve symbol, it may