Product category:
Valve Hardware (Filters, Flow Controls, Positioners etc)
News Release from: Parker Hannifin - Filter Division | Subject: 900FH and 1000FH turbine series
Edited by the Engineeringtalk Editorial
Team on 20 March 2003
Filters remove water from diesel
supplies
The 900FH and 1000FH turbine series fuel filter water separators (FFWS) for high-performance diesel engines feature a patented internal fuel shutoff valve.
The 900FH and 1000FH turbine series fuel filter water separators (FFWS) for high-performance diesel engines feature a patented internal fuel shutoff valve The new FH turbine series has been designed to ensure that end-users continue to experience the highest filtration efficiencies not always offered when fitting copy replacement elements
This article was originally published on Engineeringtalk on 19 Oct 2000 at 8.00am (UK)
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The new patented internal fuel shutoff valve will only open when the turbine housing is fitted with one of the new, original Racor replacement 2020 or 2040 elements.
Elements other than genuine Racor cartridges will not open the shutoff valve.
The fuel shutoff valve keeps unfiltered fuel from entering clean-side passages during element removal and provides users with a consistent prime and less chance for trapped air to circulate through the fuel system.
The valve features a steel spring that pushes up on the element to make servicing more convenient.
Inserting or removing the replacement element activates the valve.
As the element is inserted into the assembly, the valve opens and allows only clean fuel to pass to the engine.
If the element is removed, the valve closes and stops all fuel flow out of the assembly.
Racor acknowledges that copy elements may initially be cheaper, however, it was found that these elements, when tested (at the purpose-built laboratory at Parker's manufacturing location in Dewsbury, West Yorkshire) in accordance with the ISO4020 water separation test, had water removal efficiencies as low as 30 to 35%.
This is well below the 99% efficiency offered by Racor as a result of its patented waterproof "Aquabloc" media, and well below the minimum efficiencies recommended for today's diesel fuel injection systems.
In addition to the poor water removal efficiencies experienced from the copy elements, it is worth noting that they are typically made from cellulose media which, when made wet by the water, actually causes the individual fibres that go to make up the filter media to swell and expand, therefore cutting off the path through which the fuel flows which, in turn, greatly reduces the life of the element.
It was also found that the copy elements usually have a higher clean element pressure drop which, again, results in shorter times between service intervals. Request a free brochure from Parker Hannifin - Filter Division ...
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