Nominal vs. Absolute is probably the most misunderstood aspect of
industrial filtration. The design of the vessel housing and the element
used for separation determine the overall efficiency. “Nominally
efficient” alludes to the fact that some larger particles are likely to bypass
the system due to the way the element is designed or seated within the vessel.
Filter designs employ elastomeric or non-alloy crush seals to prevent
element bypass; pipeline strainers normally rely on a metal-to-metal seal
between element and housing.
Both strainers and filters can be provided in duplex configurations, which
are used for applications in which the process cannot be interrupted for
cleaning or replacement of the element.
Likewise, both strainers and filters can be automated to “self-clean”.
This is sometimes preferable to duplexed designs when personnel are not
available to clean or replace clogged elements. Designs exist to minimize
differential pressure fluctuation as well as to minimize loss of process fluid.
Common fluid name
Particle size to remove
Estimated concentration, PPM
Describe the solids to be removed
Specify the maximum flow rate, pressure and fluid temperature
Advise the inlet and outlet pipeline size, connections and material of construction
Perhaps most importantly, an overview of your application including the problem you are trying to solve and if you have any special requirements which might include special coatings, documentation or NDT procedures.
Each one of our inquiry forms are designed "product specific", prompting you for the applicable information required to generate a proposal.
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