Porthole gasket and assembly for a heat exchanger
First Claim
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.
1 Assignment
0 Petitions
Accused Products
Abstract
A porthole gasket to be installed between a corrugated first plate and a second plate of a heat exchanger such that a central extension plane of the gasket is parallel to the first and second plates is annular and arranged to enclose, within the gasket inner periphery, porthole areas of the first and second plates. A first surface of the gasket, configured to engage the first plate, is corrugated to define alternately arranged gasket ridges and gasket valleys along a longitudinal extension of the gasket. The ridges and valleys mate with plate valleys and plate ridges, respectively, of the first plate. A second surface of the gasket, configured to engage a plate arrangement comprising the second plate, is essentially plane and arranged to contact an essentially plane surface of the plate arrangement. The ridges protrude, and the valleys descend, in a normal direction of the central extension plane.
12 Citations
17 Claims
- 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.
- 16. A porthole gasket configured to be installed 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 possessing a longitudinal extension defining an annular shape 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, the porthole gasket possessing a first surface and a second surface that face in opposite directions, the first surface of the porthole gasket being arranged to engage a back side of the corrugated first plate and being corrugated to define gasket ridges and gasket valleys that alternate with one another along the longitudinal extension of the porthole gasket before the porthole gasket is installed between the first and second plates, 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, the second surface of the porthole gasket being not corrugated and essentially plane and arranged to contact an essentially plane surface of a plate arrangement comprising the second plate, the gasket ridges protruding in a direction perpendicular to the central extension plane so that the tops of the gasket ridges are located on one side of the central extension plane, the gasket valleys descending in the direction perpendicular to the central extension plane so that the bottoms of the gasket valleys are located on an opposite side of 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.
Specification