Service & Troubleshooting Guide #18-08-043
equipment: Asphalt Storage Tanks
Checking operation of Apollo valve actuators
used on CEI asphalt storage tanks
Apollo valve actuators are used on most CEI asphalt storage tanks. They perfom a very important function:
If the temperature of the asphalt stored in the tank falls below the tank's temperature set point, the Apollo actuator opens the hot oil valve to the tank. This allows heat transfer oil from the hot oil heater to flow through the tank's coils and heat the asphalt stored in the tank.
In the same manner, the Apollo actuator closes the hot oil valve once the asphalt has reached the tank's set point temperature set on the temperature controller.
This guide discusses how to check the Apollo actuator to make sure it is working properly.