Heinrichs Messtechnik GmbH
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Operating Manual K09
3
Operational mode and system design K09
Float principle:
The product flows vertically through the meter from the bottom to the top. The height of the float in the
measuring tube is a measure of the flow quantity.
The float is in equilibrium between the buoyant force of the flowing medium and the counteracting force of
gravity on the float.
The measured value is indicated on the measuring-tube scale with the upper edge or the indicator edge of the
float (ball).
3.1
K09 system design
The meter consists of a conical measuring tube made of glass containing a vertically free-moving float The
height of the float in the measuring tube reproduces the calibrated flow quantities on the measuring tube.
3.2
Measuring principle for K09- V / N
Differential pressure regulator:
The diaphragm of the controller is in a state of equilibrium when the pressure conditions are the same on both
sides. The pressure on the inlet side is determined by the pressure of the product; the pressure on the outlet
side is determined by the pressure drop of the setting valve of the flow meter.
If either the inlet or outlet pressure changes, the change in pressure is compensated by the built-in diaphragm
valve - thus maintaining a constant set flow rate.
Important: The regulator can only regulate inlet or outlet pressure fluctuations. Steady pressure conditions
must prevail on each side of the regulator.
3.3
K09-..V / N system design
The unit consists of a K09 variable-area flow meter, equipped with a diaphragm differential pressure flow
regulator. The variable-area flow meter consists of a device fitting with an integrated measuring tube made of
glass that contains a vertically movable float and the valve for setting the flow rate.
The differential pressure flow controller is made of stainless steel and consists of a diaphragm made of Viton or
PTFE and a compensating valve made of stainless steel.
For gaseous products, there are two versions available:
K09-...V for a constant inlet pressure and a variable outlet pressure
K09-...N for a constant outlet pressure and a variable inlet pressure
For liquids, both versions can be used; however, the K09-...V version should be favoured.
