Abstract: A heat exchanger includes a plurality of polymer tubes extending between and fluidly connecting an inlet manifold and an outlet manifold, thereby providing a flow path inside said tubes for a first fluid between the inlet manifold and the outlet manifold. The tubes are configured to have space between the exterior surfaces thereof, thereby providing a fluid flow path for a second fluid through the space between the exterior surfaces of the tubes.

Abstract: A coil support suitable for supporting a coil in a condensing unit includes a body and a protrusion extending from the body. The protrusion is configured to limit movement of the coil in at least one direction.

Abstract: A sealing assembly especially adapted for high pressure hydraulic applications includes a circumferentially compressible seal ring having stepped overlapping ends and a resilient expander, preferably of oval cross-section, which assists in urging the compressed seal ring into sealing communication with the thus sealed surfaces. The seal ring is manufactured with an oversized closed gap condition from a filled synthetic material having a modulus of elasticity sufficient to permit compression thereof when the seal ring is installed between the thus sealed surfaces. The ring may optionally include a secondary resilient sealing member positioned between the axial, internal surfaces of the steps.