flow regulators – construction and function
The purpose of a flow regulator is to ensure that a defined,
virtually constant flow rate is maintained, which is unaffected
by pressure fluctuations to the greatest extent possible.
A NEOPERL® flow regulator comprises a precision control
o-ring, a core and a housing (certain models). The gap
between the o-ring and the teeth of the core is the opening
through which the water flows. The opening may be
inside or outside the o-ring depending on the model.
Precision control o-ring
– Static state
(no flow, no or low pressure)
The 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, thus increasing the size of the opening
for the water (returning to position 2 and then to position 1).
34 | Flow regulators