Fuel discharged from the vent pipe

1.If fuel is discharged from the vent before or at the moment of pump starting:

a.The temperature is too high, underground pipe too shallow, or the dispenser or pipe under direct sunlight, which makes the fuel swell and come out. Improve the piping system of the service station.

b.If two pumps share a fuel supply line, the less frequently used pump will has this problem. Improve the piping system. 

2.Fuel comes out of the vent pipe if the pump has been powered for a long time(or many times) without delivery.

3.Air sucked in through leaky pipe may result in the air-fuel mixture coming out of the vent pipe.

4.The float is stuck and fuel will not flow back. Fix or replace the float.

Abnormal noise

1.The pump filter is blocked, which needs cleaning.

2.Vane is broken. Replace it.(only for vane pump)

3.The bypass valve does not work properly. Clean or readjust it.

4.If the pump noise level fluctuates, see “Flow rate fluctuates”

5.The motor is not properly connected to the meter. Adjust it.

6.There are foreign matters in the pump. Disassemble it and clean out dirt.

7.The pressure of pump is adjusted too high.

If you have any problem when using Censtar fuel dispenser, please feel free to contact with us.

Send your questions to [email protected]. Our professional service help you to solve fuel dispenser problem and meet your demand.