Product Overview
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.
The by-pass circuit easily
detaches for cleaning.
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, protecting potential debris from interfering with
spring/magnetic disc mechanism.
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
Control 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