Removal device

A removal device for removing gas bubbles and/or dirt particles from a liquid in a liquid conduit system or for removing particles of a heavier or lighter liquid from the liquid in the liquid conduit system, the removal device comprising:

• an entry,
• at least one exit,
• a housing which defines an inner space,
• a main flow channel extending from the entry to the exit at least in part through the inner space, the main flow channel being defined by at least one tube,
• at least one branch flow passage, the branch flow passage allowing fluid communication between the main flow channel and a quiet zone outside the tube and within the inner space which is defined by the housing, and
• at least one return flow passage, the return flow passage allowing fluid communication between the quiet zone outside the tube and the main flow channel,
• wherein the quiet zone has a greater cross-sectional area than the main channel and,
• wherein the removal device is constructed to branch off only a relatively small portion of the main flow, with the result that in use the liquid in the at least one quiet zone has a substantially smaller velocity than the liquid in the main flow channel, allowing dirt or particles of a heavier liquid to settle and/or allowing gas bubbles or particles of a lighter liquid to rise in the quiet zone.