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Common Industry Terms III

May 2015

The filtration industry uses industry-recognized terminology to communicate various things relative to filters. What type of filter is it? How does it work? What components are included within the filter and what does that tell us? What are the performance levels of the filter itself? These terms help us to understand the characteristics of all filters, regardless of brand.

Here are a few common industry terms relative to filtration.

Anti-Drainback Valve
The valve often provided in the inlet of a filter to prevent oil draining back through the oil pump.

By-Pass Valve
In some systems this valve is built into the filter. In other systems, this valve is built into the casting to which the filter attaches. The valve allows oil to by-pass the filter when the filter element does not permit a proper flow of oil to lubricate the engine as in cold start or filter plugging situations.

End Seal
A means of sealing against the flow of unfiltered oil outside the end caps of a filter element. The end seal is quite often fastened to the end cap with adhesive or a metal retainer device. Compression seals fit against smooth surfaces using a spring to compress.

Post Seal
A means of sealing the filter to a post located on the filter adapter or within the filter housing. This component seals on its inside diameter radially around the post.

Stand Pipe
This often serves to maintain a certain level of oil within the filter following engine shutdown. May also be used as the oil inlet or outlet tube and in some filters contains the pressure differential valve.

Retainer
Any device that holds a component in place.

Drain Valve
Typically found on spin-on fuel filter/water separators, this valves allows draining of water from the filter if need be prior to changing out the filter.

Water-In-Fuel (WIF) Sensor
Included within some fuel filter/water separators, sends an electrical signal to notify the end user if water has reached a certain level within the filter.

We will include additional terms in future editions of Tech Tips.