2019 NAPA Reference Guide

Fuel Filters Special Applications Dispensing Equipment 4027 Water Sensor Fuel Pump Filter For Gasoline, Diesel Fuel, Gasoline Blends* and Oxygenated Fuels (MTBE)* The problem of contamination bulk fuel storage has changed considerably especially with the introduction of alcohol blended or oxygenated fuel. The solid contaminant problem can be greatly increased during changeover period due to the scouring action of the blends on existing corrosion in the storage facilities and delivery lines. The potential water problem has drastically changed. When enough water is introduced into the blends to lower concentration, the alcohol becomes incapable of staying in solution and separates from the fuel. This condition is termed “phased separation”. Introduction of fuel in this condition into a vehicle’s fuel system will result in erratic engine operation. Product Features The NAPA 4027 Fuel Dispensing Pump Filter, which can be used with gasoline, diesel fuel, gasoline blends and oxygenated fuels (MTBE), provides numerous features and advantages. 1. Primary filter media of pleated cellulose and chemically enhanced filter media remove solid contaminants and water from the fuel. 2. Secondary filter media – a second layer of chemically enhanced filter media for greater water absorption capacity. 3. Synthetic wrap prevents media migration and acts as final dirt barrier. 4. Woven fiberglass screen supports media migration barrier. 5. Spiral, perforated metal center tube supports filter media and provides for an optimum flow rate. 6. Plated steel end caps prevents leaks from pressure, cracking and corrosion. 7. Plastisol adhesive provides a leak proof seal between the filter media and the end caps. 8. Coiled steel tension spring holds the filter element firmly in place to prevent internal bypass. 9. Specially formulated gasket for leak proof seal. 10. Environmentally friendly filter shell. Differentially coated tinplate can be recycled. Does not contain any hazardous materials. Installation/Activation The NAPA 4027 Fuel Dispensing Pump Filter is installed on a conventional spin-on filter base between the fuel dispensing tank and the dispensing nozzle. In this position, all fuel must pass through the filter and is cleaned of solid contaminants. When water is introduced and phase separation occurs, the special sensing layer will selectively absorb the water from the fuel causing it to swell. This will result in an increase in differential pressure and a drop in flow rate from approximately 12 GPM to less than 1 GPM in about 60 seconds. When the special sensing layer is activated and the fuel flow is drastically reduced, this signals the operator that water is present. If a new filter is installed without eliminating the water contamination, the filter will again reduce the rate of fuel flow as it absorbs water. Fully Tested Laboratory and field tests have shown our chemically enhanced filter media readily absorbs approximately 8 oz. of water in fuel. When water is introduced and phase separation occurs the pressure drop begins to increase and the flow decreases from approximately 12 GPM to less than 1 GPM in about 60 seconds. * Maximum 15% Alcohol (Methanol or Ethanol) 1038