Frequently Asked Questions
The following is a summary and answer to the frequently asked questions (FAQ) about fuel dispenser filters, covering core contents such as performance, maintenance, and faults:
1.What is the core function of the fuel dispenser filter?
The main function is to filter impurities (such as rust, sand, and oil sludge) and water in the fuel, prevent them from entering the vehicle engine, avoid problems such as fuel injector blockage and oil pump wear, and at the same time protect the internal components of the fuel dispenser (such as flow meters and metering pumps), maintaining the metering accuracy and operational efficiency of the refueling system.
2. How often does the filter need to be replaced?
The replacement cycle usually depends on the fuel quality, usage frequency and environmental conditions:
Conventional scenarios: Replace every 3 to 6 months;
For scenarios with a high impurity content (such as after oil tank cleaning and old pipelines) : It is recommended to shorten it to 1-3 months.
Based on pressure difference judgment: If the pressure difference before and after the filter exceeds the threshold specified by the manufacturer (such as 0.3-0.5MPa), it needs to be replaced immediately.
3. How to determine if the filter needs to be replaced?
Slower refueling speed: It indicates that the filter element is clogged, resulting in increased resistance to fuel flow.
Fuel dispenser alarm: Some devices will prompt through indicator lights or display screens that the filter is abnormal.
Increased fuel impurities: Obvious impurities or turbidity are observed in the fuel coming out of the fuel nozzle.
Maintenance record: Beyond the recommended replacement cycle, replacement is required even if there are no obvious abnormalities.
4. What are the reasons for the filter's glue shedding or seal failure?
Material mismatch: The glue has poor chemical compatibility with filter components (such as filter materials and casings), and loses its stickiness after being eroded by oil.
Production process defects: Uneven application of adhesive and improper curing conditions result in insufficient bonding strength.
Environmental factors: High temperature and high humidity environments accelerate the aging of glue. Frequent vibration loosens the bonding area;
Improper installation: Excessive force during installation or the sealing surface not being cleaned, damaging the bonding structure.
5. Can the filter filter the moisture in the fuel?
Some filters have phase separation functions, which adsorb and retain water through hydrophobic filter materials such as cellulose and glass fiber. However, it should be noted that the separated water of this type of filter needs to be discharged regularly (through the bottom drain valve) to avoid excessive water accumulation affecting the filtration effect.
6. Can filters of different brands be used interchangeably?
Some can be used interchangeably. The interface size, filtration accuracy and flow parameters of filters from different brands may vary. When replacing, it is necessary to ensure that the model matches the specifications of the fuel dispenser.
7. What safety precautions should be taken when replacing the filter?
Fire and explosion prevention: Smoking and open flames are strictly prohibited in the operation area. Use explosion-proof tools and avoid static electricity or sparks.
Prevent leakage: Before replacement, turn off the power supply and the oil delivery valve, release the pipeline pressure, and use a container to collect the residual oil.
Personal protection: Wear anti-static clothing, gloves and goggles to avoid contact of oil products with the skin.
Compliance handling: Old filters and waste oil must be handed over to professional units for processing and must not be discarded at will.
