Tube aerator
A pipe ventilator (RB) is a safety fitting which prevents possible negative pressure in pipes and risers by automatically sucking in air. In a collectively secured drinking water system, pipe aerators are located on all risers, and in individually secured systems in every tap.
Tube aerators are available in versions C, D and E:
Pipe aerator C is a straight-through type, the closing body of which is raised when there is negative pressure in the drinking water pipe and at the same time releases air intake openings. The incoming air separates the liquid column and prevents the process water from flowing back into the drinking water pipe. Most of the time, the RB C is used in combination with a backflow preventer in a shut-off valve , which is therefore self-locking.
Tube aerator D is an attachment form whose ventilation openings are also closed when in operation. When there is negative pressure in the drinking water pipe, the float moves due to its own weight and the external air pressure, and opens the air intake slots. The incoming air in turn separates the water column.
Tube aerator E works like D, but has a discharge funnel. RB E sits as a riser closure in collective-secured systems, which is only the case today in existing buildings.
literature
- Thomas H. Klümper (Hrsg.): Water use - drinking water installation . Oldenbourg Industrieverlag, 2000, p. 201–206 ( preview in Google Book Search).