Abstract: A heat exchanger includes a heat exchanger shell having an inlet and outlet. A header plate including an inner member and an outer member defining a leak detection chamber therebetween is provided at each end of the heat exchanger shell. A plurality of heat exchanger tubes is positioned in the heat exchanger shell. Each tube extends through an aperture formed in an inner member and an aperture formed in an outer member of each of the header plates. A seal is provided in a channel in each aperture to sealingly engage a corresponding heat exchanger tube and a corresponding plate. A passage leads from the leak detection chamber to the exterior of the header plate.

Abstract: An improved radiator construction comprising a cooling tube having a barbed end, preferably with an adjacent collar, spaced apart sufficient to engage an elastomeric seal. The seal and tube are positioned in the opening of a radiator or heat exchanger header so that the tube barb and collar and the engaged seal cooperate to retain the cooling tube in the header.

Abstract: A heat exchanger tube having fin elements angled in an acute manner from a lateral axis of the flow tube to promote the deflection of debris. The heat exchanger may have a deflector element positioned between the fin elements to prevent the collection of debris between the fin elements.

Abstract: A heat exchanger is described wherein each heat transfer tube is individually removable along its longitudinal axis such that a dense tube configuration within the heat transfer chamber can be maintained.