Product Overview

Primary Secondary
Gp Gs
Primary Secondary
Gp Gs
Primary Secondary
Gp Gs
Gprimary = Gsecondary Gprimary > Gsecondary Gprimary < Gsecondary
2
3
4
1
Gp Gs
primary secondary
Operating principle
Hydraulic separation
When a single system contains a primary production circuit, with its
own pump, and a secondary user circuit, with one or more distribution
pumps, operating conditions may arise in the system whereby the
pumps interact, creating abnormal variations in circuit flow rates and
pressures. The hydraulic separator creates a zone with a low pressure
loss, which enables the primary and secondary circuits connected to
it to be hydraulically independent of each other; the flow in one
circuit does not affect flow in the other.
In this case, the flow rate in the respective circuits depends exclusively
on the flow rate characteristics of the circuit pumps, preventing
reciprocal influence caused by connection in series. Therefore, using a
device with these characteristics means that the flow in the secondary
circuit only circulates when the relevant pump is on, permitting the
system to meet the specific load requirements at that time.
When the secondary pump is off, there is no circulation in the secondary
circuit; the whole flow rate produced by the primary pump is by-passed
through the separator. With the hydraulic separator, it is therefore
possible to have a primary production circuit with a constant flow rate
and a secondary distribution circuit with a variable flow rate; these
operating conditions are typical of modern heating and cooling systems.
Three possible hydraulic balance situations are shown below.
Microbubble air separation
The HydroCal’s internal element
(1) creates the whirling movement
required to facilitate the release of
microbubbles and their adhesion
to the internal element surfaces.
The bubbles, fusing with each
other, increase in size until the
hydrostatic thrust overcomes the
adhesion force to the mesh. They
rise towards the top of the unit from
which they are released through a
float-operated automatic air vent.
Microparticle dirt separation
Impurities in the fluid upon striking
the surfaces of the HydroCal’s
internal element (1), get separated
and drop to the bottom of the
body (2) where they collect.
In addition, the large internal
volume of HydroCal
™
slows down
the flow speed of the fluid thus
helping, by gravity, to separate the
particles it contains.
The collected impurities are
discharged, by opening the drain
valve (3) with the handle (4), even
with the system operating.