When the float of a filter separator is in its lowest position, supply pressure is directed to which component?

In a filter separator system, the float mechanism plays a crucial role in managing water separation from fuel. When the float is in its lowest position, it indicates that the water level in the separator is high enough to warrant action. In this state, supply pressure is directed to the water drain valve.

The purpose of this mechanism is to ensure that any accumulated water is expelled from the separator, preventing it from contaminating the fuel system. The water drain valve opens under the influence of the supply pressure, allowing the excess water to be drained off, thereby maintaining the efficiency of the filter separator.

Other components listed do not receive supply pressure in this scenario. The Powertrol and Auxiliary hytrol are more associated with control functions rather than water management, and the fuel drain valve pertains to the management of excess fuel rather than water. Thus, directing supply pressure to the water drain valve is essential for maintaining operational integrity and preventing fuel contamination, showcasing the filter separator’s design in managing water effectively when levels are high.