Brochure

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FlowCal™ balances the hydraulic circuit by automatically controlling
the design flow rate to each emitter. Even with some circuits closed
by the control valves, the flow rates in the open circuits remain
constant at the nominal value. The system always provides the
greatest comfort and the highest energy savings.
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In this case, the spring-loaded piston fully
compresses a spring and leaves only the
fixed orifice for the fluid to pass through.
The flow rate through the FlowCal™
depends only on the differential pressure.
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In this case, the spring-loaded regulating
piston remains in equilibrium without
compressing the spring and gives the fluid
the maximum free flow area. When below
the differential pressure control range the
piston acts as a fixed orifice and thus the
flow rate through the FlowCal™ depends
only on the differential pressure.
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If the differential pressure is within the
control range, the spring-loaded piston is
positioned to give the fluid a free flow area
permitting regular flow at the nominal
Q@SD for which the FlowCal™ is set up.
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DEVICES
* These values are for this example. The same logic applies to the other Differential Pressure Control Ranges for FlowCal™ series 127 and 121.