Abstract: Disclosed herein is a package convertible into a frame, comprising: a flat rectangular support plate, a rectangular frame element, and a rectangular lid element. The support plate, the frame element and the lid element are formed and arrangeable with respect to each other in such a way that in the package state the support plate is circumferentially grippable by at least a lower edge of an outer wall of the frame element. On an upper wall of the frame element parallel to the support plate the lid element is arranged so that a package in parallelepiped shape is created. In the frame state the frame element is arranged on a front surface of the support plate along its circumference, and the lid element is arranged either on a rear surface of the support plate or between a front surface of the support plate and the frame element.

Abstract: The invention relates to a package (10) convertible into a frame, comprising: a flat rectangular support plate (11) having a front surface (70) and a rear surface (72), a rectangular frame element (19) having an outer wall (40) arranged at its outer circumference with a lower and an upper edge (43, 44) and an upper wall (42) of the frame element (19) adjoining with the upper edge (44) on the inside of the frame element (19), and a rectangular lid element (60). The support plate (11), the frame element (19) and the lid element (60) are formed and arrangeable with respect to each other in such a way that in the package state the support plate (11) can be circumferentially gripped by at least the lower edge (43) of the outer wall (40) of the frame element (19).

Abstract: A tube expander for heat exchanger coil units according to which a tubular expansion process is conducted. In one aspect, the tube expander includes a fixture, which includes a back unit and first and second door assemblies movably connected thereto. One or more heat exchanger coil units are adapted to be connected to each of the first and second door assemblies. In another aspect, the fixture is adjustable to accommodate different heat exchanger coil units. In yet another aspect, the tubular expansion process is not permitted when the first or second door assembly is closed and a sensor does not sense the presence of a latch bar.

Abstract: A tube expander for heat exchanger coil units according to which a tubular expansion process is conducted. In one aspect, the tube expander includes a fixture, which includes a back unit and first and second door assemblies movably connected thereto. One or more heat exchanger coil units are adapted to be connected to each of the first and second door assemblies. In another aspect, the fixture is adjustable to accommodate different heat exchanger coil units. In yet another aspect, the tubular expansion process is not permitted when the first or second door assembly is closed and a sensor does not sense the presence of a latch bar.

Abstract: A tube expander for heat exchanger coil units according to which a tubular expansion process is conducted. In one aspect, the tube expander includes a fixture, which includes a back unit and first and second door assemblies movably connected thereto. One or more heat exchanger coil units are adapted to be connected to each of the first and second door assemblies. In another aspect, the fixture is adjustable to accommodate different heat exchanger coil units. In yet another aspect, the tubular expansion process is not permitted when the first or second door assembly is closed and a sensor does not sense the presence of a latch bar.

Abstract: A tube expander for heat exchanger coil units according to which a tubular expansion process is conducted. In one aspect, the tube expander includes a fixture, which includes a back unit and first and second door assemblies movably connected thereto. One or more heat exchanger coil units are adapted to be connected to each of the first and second door assemblies. In another aspect, the fixture is adjustable to accommodate different heat exchanger coil units. In yet another aspect, the tubular expansion process is not permitted when the first or second door assembly is closed and a sensor does not sense the presence of a latch bar.