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Porthole gasket and assembly for a heat exchanger

  • US 10,871,333 B2
  • Filed: 12/06/2016
  • Issued: 12/22/2020
  • Est. Priority Date: 12/16/2015
  • Status: Active Grant
First Claim
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1. A porthole gasket for installation between a corrugated first plate, in a form of a heat transfer plate, and a second plate, in a form of an end plate, of a heat exchanger such that a central extension plane of the porthole gasket is parallel to the first and second plates, the corrugated first plate in the form of the heat transfer plate comprising plate ridges extending in an upper plane, plate valleys extending in a lower plane and a gasket groove configured to accommodate a plate gasket on a front side of the corrugated first plate, the porthole gasket being annular and arranged to enclose, within an inner periphery of the porthole gasket, a porthole area of the corrugated first plate and a porthole area of the second plate, wherein a first surface of the porthole gasket, which is arranged to engage with a back side of the corrugated first plate, is corrugated so as to define alternately arranged gasket ridges and gasket valleys along a longitudinal extension of the porthole gasket, the gasket ridges each possessing a top and the gasket valleys each possessing a bottom, the gasket ridges and the gasket valleys being arranged to mate with the plate valleys and the plate ridges, respectively, of the corrugated first plate, and a second surface of the porthole gasket, which is arranged to engage with a plate arrangement comprising the second plate, is essentially plane and not corrugated and is arranged to contact an essentially plane surface of the plate arrangement, the gasket ridges protruding, and the gasket valleys descending, in a normal direction of the central extension plane so that the tops of the gasket ridges are positioned elevationally above the bottoms of the gasket valleys when the second surface of the porthole gasket is facing downward in a direction perpendicular to the central extension plane, the porthole gasket possessing a width measured parallel to the central extension plane and perpendicular to the longitudinal extension of the porthole gasket.

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