The tube expansion machine is also called high pressure hydraulic tube expander. And the high pressure hydraulic tube expansion machine is an innovative tube expander different from the traditional mechanical tube expander.
Hydraulic Tube Expansion Machine Operating Principle
The high pressure hydraulic tube expanding machine utilizes water or hydraulic fluid as the working medium and hydraulic pressure as tube expanding power. It applies uniform hydraulic pressure to the inner surface of the tube to cause plastic deformation of the tube, thus achieving the tube to fins joint or tube to tube-sheet joint. Thereby, the hydraulic tube expansion process is also called flexible tube expansion joint.
How to Choose the Right Hydraulic Tube Expander
There are two types of high pressure hydraulic tube expanders: air driven hydraulic tube expanders and electric powered hydraulic tube expanders. You need to choose the appropriate hydraulic tube expander according to the type of equipment you need to expand.
If your equipment is a finned type heat exchanger such as a condenser or radiator, generally speaking, its tubes are not large in diameter and not thick, so the required expansion pressure is not particularly high. The air operated tube expanding machine is cheaper and has an output pressure of 80MPA, which is enough to meet your requirements.
If your equipment is a shell and tube type (tube bundle type ) heat exchanger such as a boiler, a large condenser or a high-pressure heater, and what you ask for is the expansion joint of tube to tube-sheet. Normally, the tubes of such large equipment are very thick and large in diameter, and the tube-sheet is thick too, which require much higher pressure to complete tube expanding. The electric powered hydraulic tube expanding machine can output pressure up to 500MPa, undoubtedly, it is suitable for you.
