Aerator

from Wikipedia, the free encyclopedia

A jet regulator ( engl. Aerator ; also aerator , mixing nozzle or aerator ) is a nozzle , which at the outlet of the most faucets in kitchens and bathrooms, as well as many other water fittings is attached. The jet regulator standardizes, widens and slows down the water jet that emerges from the fitting. Usually air is added for this purpose. When using aerators, the amount of water required to wet surfaces, such as washing and washing up, can be reduced.

Water volume regulators also limit the amount of flowing water. They often look very similar to the aerators.

The EN 246 standard contains requirements for jet regulators, in particular with regard to the flow rate ( throughput ) and noise reduction.

Structure of a jet regulator

application

Jet regulators shape the water jet emerging from sanitary fittings. Even at low water pressure, an even jet should be generated that does not ripple. When the water pressure is high, the jet should remain soft to prevent splashing. The reduction in throughput saves water.

Aerators can dampen outflow and valve noises. There are aerators with a ventilated jet, laminar jet and shower jet, as well as in different flow classes. In flow class A, around 15 liters per minute flow at 3 bar water pressure. Special water-saving models limit the flow e.g. B. to 7 l / min.

Structure and variants

A jet regulator usually consists of a mouthpiece, an inner part and a seal . The inserts are made of either plastic or metal. Plastic components often calcify somewhat more slowly than metal components. It is also easier to optimize their shape in production. Metal inserts, on the other hand, are more robust and often more durable.

There are aerators with internal thread (for screwing on, 22 mm metric thread, trade name IG M22) and external thread (for screwing in, 24 × 1 mm metric fine thread , trade name AG M24). Bathtub spouts usually have jet regulators with a larger diameter (external thread 28 mm, trade name AG M28). There are also sizes M18, M19 and M21, which are often only available in stores on request.

  • Aerator, outside; metal insert on the left, plastic insert on the right

  • Aerator, inside; plastic insert on the left, metal insert on the right

  • Jet regulator, with water flow regulator , inside; plastic insert on the left, metal insert on the right

  • Aerator, with water flow regulator , outside; plastic insert on the left, metal insert on the right

literature

  • Karl Volger, Erhard Laasch: House technology. Basics - planning - execution. 10th, revised edition. BG Teubner, Stuttgart 1999, ISBN 3-322-94100-0 , p. 307 ff.
  • A. Gramberg: Technical measurements for machine inspections and for operational control. 5th enlarged edition. Springer Verlag, Berlin / Heidelberg 1923, p. 194 ff.
  • Dirk Bohne: Technical expansion of buildings. 10th edition. Springer Verlag, Berlin / Heidelberg 2014, ISBN 978-3-8348-1832-4 , p. 56.
  • Franz Daschner (Ed.): Practical hospital hygiene and environmental protection. 2nd, revised edition. Springer Verlag, Berlin / Heidelberg 1997, ISBN 3-662-09402-9 , p. 570.
  • Uponor GmbH (Hrsg.): Practical handbook for technical building equipment (TGA). Volume 2, 1st edition. Beuth Verlag, Berlin 2013, ISBN 978-3-410-23965-9 , pp. 558-562.


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