Fuel water separator is an important part of fuel system.

A fuel water separator is a device that works to ensure clean fuel is delivered to the engine. Properly speaking, a fuel water separator is a small filtering device, acts as an added line of defence for your vehicle’s fuel system, filtering water and particulates from the fuel before it reaches the fuel filter, ensuring only a flow of clean fuel reaches your engine.

Water and contamination displaces diesel fuel’s lubricative coating on the high precision injector components, causing tolerance erosion, surface pitting, fuel pressure loss and poor performance.

The first stage of the fuel water separator uses a pleated paper element to change water particles into large enough droplets that will fall by gravity to a water sump at the bottom of the filter. The second stage is made of silicone-treated nylon that acts as a safety device to prevent small particles of water that avoid the first stage from passing into the engine.

Typical filtration media used in Fuel Water Separators is either a hydrophobic barrier media, such as silicone treated cellulose, or a hydrophilic depth coalescing media, such as glass micro-fibre.