MULTI-STAGE FILTER WITH PRESSURE RELIEF APPARATUS
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United States of America Patent
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Issued Date -
Jan 28, 2016
app pub date -
Jul 22, 2015
filing date -
Jul 23, 2014
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Abstract
A filter apparatus, a pressure relief apparatus methods are provided. The filter apparatus includes a tubular hull having an inlet port and an outlet port. A tubesheet partition separates the tubular hull interior into a first stage portion and a second stage portion. A plurality of filter elements are mounted in annular guides. A pressure relief apparatus is configured to relieve pressure through at least one of the annular guides with the pressure relief apparatus in parallel fluid circuit with the filter elements. The pressure relief apparatus includes an elongated tube, a sealing plug, an end cap, a rod disposed within the elongated tube with one end of the rod coupled to the sealing plug and another end of the rod coupled to the end cap; and a spring disposed in the elongated tube between the sealing plug and the end cap.
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