Brochure

Advantages of balanced circuits
Balanced circuits have the following principal benefits:
1. The system emitters operate properly in heating, cooling and
dehumidification, saving energy and providing greater comfort.
2. The zone circuit pumps operate at maximum efficiency, reducing
the risk of overheating and excessive wear.
3. High fluid velocities which can result in noise and abrasion are
avoided.
4. The differential pressures acting on the circuit control valves are
reduced preventing faulty operation.
Operating principle
The balancing valve is a hydraulic device that controls the flow rate
of the heating/cooling transfer fluid.
The control mechanism is a ball valve (1), operated by a control
stem (2). The flow rate is manually and properly set by use of the
convenient onboard flow meter (3) housed in a bypass circuit on
the valve body. This circuit is automatically shut off during normal
operation. The flow rate is indicated by a metal ball (4) sliding
inside a transparent channel (5) with an integral graduated
scale (6).
Construction details
Flow meter
When activated, the flow rate is
indicated on the flow meter
housed in a bypass circuit on
the valve body. When finished
reading the flow rate, the flow
meter is automatically shut off,
isolating it during normal
operation.
Use of a flow meter greatly
simplifies the process of system
balancing since the flow rate
can be measured and
controlled at any time without
differential pressure gauges or
reference charts. The onboard
flow meter eliminates the need
to calculate valve settings
during system setup.
Additionally, the unique
onboard flow meter offers
unprecedented time and cost
savings by eliminating the long
and difficult procedure of
calculating pre-settings
associated with using
traditional balancing devices.
Flow meter bypass valve
The bypass valve (1) opens and closes the circuit between the flow
meter and the valve. The bypass valve is easily opened by pulling
the operating ring (2), and is automatically closed by the internal
return spring (3) when finished reading the flow rate. The spring
and the EPDM seal (4) provide a reliable seal to isolate the flow
meter during normal operation.
The operating ring (2) material has low thermal conductivity to
avoid burns if the flow meter is opened while hot fluid is passing
through the valve.
Ball/magnet indicator
The metal ball (4) that indicates the flow rate is
not in direct contact with the heating/cooling
transfer fluid passing through the flow meter.
This is an effective and innovative measuring
system in which the ball slides up and down
inside a transparent channel (5) that is isolated
from the fluid flowing through the body of the flow
meter. The ball is moved by a magnet (6)
connected to a float (7). In this way the flow rate
indication system remains perfectly clean and
provides reliable readings over time.
Manual valve
C
ontrol valve
7 6 5 4
3
2
7 6 5 4
3
2
7
6
5
4
3
2
4
3
2
1
5
2
3
2
1
1
234
4
6
7
5
7
6
5
4
3
2
3
5
6
4
1
15