5. Balancing Valve
This type of valve provide throttling duty to regulate water flow rate for balancing purposes.
Two ports are provided in the inlet and outlet ports of the valve to permit measurement of
pressure drop across the valve. By using performance charts provided, the value of flow
rate through the valve can be determined. The valve handwheel will have a setting scale to
determine the amount of valve opening. This is useful during field commissioning and
balancing.
Generally, the internal construction is similar to a globe valve. It is more costly
than the conventional throttling valves and it is only used in systems where
proper and accurate balancing is required.
Normally, connected via
tubing to a hand-held
meter readout
pressure tapping
Setting handwhell
Section 3 Page 44
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