prefilter

prefilter

[prē′fil·tər]
(engineering)
Filter used to remove gross solid contaminants before the liquid stream enters a separator-filter.

prefilter

In air-conditioning systems, a filter, 1 before the main filter to remove the larger particles; usually has a lower efficiency than the main filter and has a low pressure drop characteristic.
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Tenders are invited for Supply of Multiple Pocket Type Prefilter Cartridge
P], will inversely affect the response and should be cancelled by prefilter, therefore the required prefilter transfer function to cancel the zero is given by Eq.
The nonwovens used for the devices are coated with similar filter medium of prefilter or the middle performance filter.
The First Need XL comes with a good pre-filter to remove solids, but to significantly prolong service life, especially when cleaning really muddy, foul water, here's what you do: Buy competitor MSR's Sweetwater SiltStopper prefilter unit (about $20) and a 3-pack of replacement pre-filters (also about $20).
20] Xiang Gen Xia, "A new prefilter design for discrete multiwavelet transforms", IEEE Transactions on Signal Processing, vol.
Various types of prefilters were evaluated initially to find the optimal pore size and the type of material of the prefilter membrane, which effectively removes particles while minimizing bacterial loss.
The chosen approach incorporates from the start some measure of generalized bandwidth for the used prefilter so that eventually the link between that generalized bandwidth (the so-called "soft bandwidth") and a critical sampling interval shall be found.
We knew that we needed to find a way to prefilter the feed water to the MBR in order to remove the oil and other components that were wreaking havoc with the system.
However, when the CP is not long enough, the orthogonality of the subcarriers is lost, causing intercarrier and intersymbol interference (ICI and ISI), and a prefilter is needed at the receiver to shorten the effective channel to appropriate length.
The company in the beginning of 2007 will launch an air purifier that features an ultraviolet lamp, a prefilter, HEPA filter and charcoal filter to reduce odors, said Robert Berger, director of product development for WindChaser.
The tests with hydroanthracite prefilter clearly indicated that in the case of using both filters the total iron content in filtered water was 1.
The company says that this allows the upstream layer to essentially act as prefilter, retaining larger particles, yeast, and colloids, while the tighter downstream layer removes microorganisms and haze components.