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Technology of the nitiFilter®

The nitiFilter® by XFP : a permanent and self cleaning filter

Filtering media by a counter-flow of filtered oil (backflushing)
Maintenance-free filter.
Can be fitted on any vehicle.

Install and forget

Backflushed contaminants are retained by the purifier
The purifier cleans the oil
Clean oil returns to the sump
Maintenance is limited to an easy drain of the purifier

nitiFilter oil filter and purifier technology

nitiFilter oil filter and purifier technology

What does make nitiFilter® si different ? Its unmatched performance

Filter design :

304L Stainless Steel Filtration Media REPS type weave
Low pressure drop
Aluminium 5083 components
by-pass valve


A guaranteed filtration aperture for optimal engine protection
⇒ Engine power remains optimum
Lower oil running temperature
100% filtered oil 

Easy maintenance and environmental friendly 

Filter design:

Sump drain is replaced by a purifier drain
System is designed to surpass engine lifetime
Oil analysis follow-up program


⇒ Easy maintenance and more than 90% less oil waste
⇒ The nitiFilter® can be re-used on your next engine
⇒ Monitor oil quality and engine health

Did you know?
With a conventional filter, clogging is progressive. Oil pump demand increases to lubricate the engine (as if you turn on the air-conditioning). Engine power decreases progressively. Oil heats up as the pressure drop across the filter increases.
  If the filter is not often replaced, the filter by-pass will open when the engine is under load. Unfiltered oil lubricates the engine:

  • Inefficient filtration leads to an increase in oil contamination. Increased contamination leads to an increase in oil consumption as contaminants will “burn” the surrounding oil.
  • As contamination increases, proper engine lubrication is impaired. Engine wear rates increase.
  • Flow through the by-pass valve varies (depending on how much flow the filter itself can still handle). Engine oil pressure fluctuates.

The by-pass valve for a conventional filter starts to open when the pressure drop across the filter is between 11 and 35 psi (depends on engine builder specifications). The by-pass valve is either integrated in the filter, either in the filter head on the engine block.

With nitiFilter®, pressure drop is below 7 psi as soon as oil reaches 60°F.

Tip: how do I know when the by-pass valve in my conventional filter opens?
If you are a Professional end-user with engines above 150 kW (off-highway machinery, heavy-duty trucks, marine application, etc.), there should be an alarm once the filter is clogged and the by-pass valve opens. Have a doubt? Check with your OEM.
If you are a Professional end-user with light-duty trucks, there is a fair chance you will have no indication the by-pass valve is opening.
If you have a passenger car, there is no indication the filter is clogged and the by-pass valve opens. At worst (or at best), your oil pressure indicator will flash at idle when the engine is hot. At that point, engine is “noisy”, throttle response is compromised and fuel consumption increases.

All nitiFilter® have an oil pump pressure port (filter inlet) and engine oil pressure port (filter outlet) to control filter pressure drop occasionally or at all times. Need a set of manometers? Please contact us.  

How to check your oil?

Why checking the oil

Analyses allow control of oil lubricating properties and engine monitoring: abnormal external pollution (air filter, covers), coolant ingression, combustion issues (leaking injectors), abnormal engine wear rates.

How to easily take an oil sample

We supply an oil sampling valve with our filtration kits. Sample is taken on the filter inlet, engine running.

When to take an oil sample

An oil sample is truly representative of the oil circulating in the engine if taken on a hot running engine (at least 104°F).

A real-life results with nitiFilter® 
Here’s an example of a test run on one of the owner’s car.
With nitiFilter® and an oil drain carried out 60,097 Km ago (37,260 miles), oil analysis result is OK. The XFP system is removed and a conventional filter is fitted. 5,000 Km (3,100 miles) later, an oil sample is taken and results show oil contamination increased.
Engine oil pressure was also monitored during the test (pressure switch was replaced by a manometer).
Owner noticed that engine oil pressure would fluctuate when on the Highway (probably due to the by-pass valve opening). 
  Analysis of nitiFilter oil

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