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
Core
+
Housing
+
=
Operating principle
– Static state
(no flow, no or low pressure)
The o-ring is relaxed (position 1).
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).
Position 2
The deformation of the o-ring increases as the pressure
rises (position 3).
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
Flow regulator