Heinrichs Messtechnik KDS/BGK Operating Instructions
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1 Identification
1.1 Supplier/manufacturer
Heinrichs Messtechnik GmbH
Robert-Perthel-Str. 9 D-50739 Köln
Phone +49 (221) 49708 - 0
Fax +49 (221) 49708 - 178
Internet: http://www.heinrichs.eu/
1.2 Product type
KDS-K/C/S and BGK:
Miniature flowmeter in all-metal design based on
the float principle
KDS-R:
Miniature flowmeter in all-metal design based on
the float principle with differential pressure
regulator
1.3 Product name
KDS-K/C (horizontal connection)
KDS-S (vertical connection)
KDS-R (vertical connection)
BGK (vertical flange connection)
1.4 Issue date
08/04/2011
1.5 Version no.
Version: KDS-BGK_BA_08_ENG
This manual is valid for devices with a serial
number bigger as 256917.
2 Applications
2.1 KDS und BGK
The KDS and BGK flowmeters are used for
measuring the flow of liquid and gaseous
products in pipes as well as dosing, monitoring,
adjusting and controlling them. They show the
current flow quantity in volume or mass per unit
in time.
2.2 KDS-R
The KDS-R flowmeter can be used for stabilizing
set flow quantities of liquid and gaseous products
in pipes. The set quantity is kept constant
independent of pressure changes during product
inflow for type KDS-R.....N or a pressure change
during product outflow for type KDS-R .....V.
3 Operational mode and system
design
3.1 Measuring principle for BGK and KDS-
K/C/S flowmeters
Float principle: The product flows through the
meter vertically from the bottom to the top, lifting
the float until the buoyancy force and the weight
of the float establish equilibrium. The height of
the float is a measure of the flow quantity.
3.2 BGK and KDS-K/C/S system design
The meter consists of a conical fitting pipe with a
float that can move vertically. The position of the
float resulting from the flow rate is converted to a
rotary motion on the pointer axis of the analog
indicator unit by the built-in permanent magnet
through the magnetic tracking system.
3.3 Measuring principle of the KDS-R
Differential pressure: The diaphragm of the
regulator is in a state of equilibrium when the
pressure conditions are the same on both sides.
The pressure on the input side depends on the
pressure of the product and the pressure on the
output side on the pressure drop of the setting
valve of the flowmeter.
If the pressure changes either on the input side
or the output side, the built-in diaphragm valve
causes a pressure compensation that keeps the
set flow rate constant.
Important: The regulator can only adjust
pressure fluctuations on the input or the output
side. The pressure conditions on the respective
other side must be stable.
3.4 KDS-R system design
The unit consists of a type KDS variable-area
flowmeter equipped with a differential pressure
regulator.
The variable-area flowmeter consists of the
device fitting made of stainless steel with an
integrated conical metal tube and a vertically
movable float. The valve for setting the flow rate
is built-in.
The height of the float resulting from the flow rate
is transmitted by the permanent magnet in the
float through the magnetic tracking system in a
rotation to the pointer axis of the analog indicator
unit.
The differential pressure regulator is made of
stainless steel and consists of a diaphragm made
of Perbunan or PTFE and a compensating valve
made of stainless steel.
