Product Overview

Primary Secondary
Gp Gs
Primary Secondary
Gp Gs
Primary Secondar y
Gp Gs
Primary Secondary
Gp Gs
Primary Secondary
Gp Gs
Primary Secondar y
Gp Gs
Primary Secondary
Gp Gs
Primary Secondary
Gp Gs
Primary Secondar y
Gp Gs
Gprimary = Gsecondary Gprimary > Gsecondary Gprimary < Gsecondary
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 flow path with a low
pressure loss, which enables the primary and secondary circuits
connected to it to be hydraulically independent of each other; the ow
in one circuit does not affect ow 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.