|
Aerator with flow regulator( PCA ® Aerator)
Pressure Compensating Aerator
|
|
|
|
There are basically two possible ways to control the flow. One is to restrict it by defining the size of the orifice in such a way as to permit a predetermined flow rate at a specific pressure( e. g. 3 bar). Neoperl refers to these products as“ flow restrictors”. While flow restrictors allow little water to pass at low pressure, the flow rate is often higher than necessary at high pressure. |
flow l / min | gpm |
|
|
Customer satisfaction |
Environmental protection |
Aerator with integrated flow regulator Under normal conditions, the water flow through an aerator increases as the pressure rises. However, it may be necessary to achieve a virtually constant flow rate, regardless of pressure fluctuations, in situations where the flow rate is subject to certain requirements, e. g. – compliance with standards in specific markets – saving water – regulated distribution of water.
This is where the PCA ® technology comes into its own. PCA ® aerators are easier and more convenient to use than flow restrictors at low pressure and save water at high pressure. The user has as much water as he needs( customer satisfaction) but uses no more than is necessary( environmental protection).
How the PCA ® technology works
Static state( no flow, no or low pressure): the precision control o-ring is relaxed( position 1).
Dynamic state( flow): As soon as water flows through the flow regulator, the o-ring becomes distorted and is pressed into the gaps between the teeth of the core. This reduces the size of the opening for the water( position 2). The deformation of the o-ring increases as the pressure rises( position 3). When the pressure decreases, the o-ring gradually returns to its original shape, increasing the size of the opening for the water again( returning to position 2 and then to position 1).
Low or no pressure( 0 bar) Position 1
High pressure( 5 bar) Position 3
N o r m al p re s s u re( 3 b a r) P o sitio n 2
Aerators | 9