Franklin Fueling Systems three way air interlock valves lock the brakes on the trailer by depressing the plunger button preventing the truck from leaving the loading rack while still connected to the loading arm.
The air interlock with limit switch gives you the added feature of ensuring the vapor recovery hose is connected before fueling can begin. After the button is depressed locking the brakes the rack monitor must sense a vapor connection before giving the green light for fueling
Both anodized aluminum valves come with standard TTMA and API mounting holes.
