Flap-type flow meter is a robust, reliable flow meter that provide direct visual indication of flow rate in pipelines. It is commonly used in water treatment plants, power stations, to monitor cooling processes, and in building technology and swimming pools. Measurement medium includes water, air, liquids, gases, non-conductive fluids (mineral oils, demineralised water), highly viscous media and fluids with a high content of solids or gas.

KLA series flow-meter is based on the same operating principle as the KFS Standard and KFS-M40 Series. Inside the meter a flap moves up and down in analogy to the amount of liquid flowing through.
In the KLA-GS version the quantity is directly indicated by the flap; The flow meter is equipped with hard glass screens at the front and at the back. The flow-rate reading is done on an integrated scale into the front hard glass screen. The economical version KLA Standard provides a direct visual display.
In both versions a magnet transmits the movement of the flap to a pointer in the case.
For process control, the measuring device can be equipped with:
- 1 or 2 inductive contacts
- 1 analogue transmitter, 4-20 mA output: angular position transducer. The signal must be linearized.
Features:
- For liquids
- From DN 15 up to DN 200
- Horizontal or vertical mounting
- Independent of viscosity
- Outputs: 4-20 mA, contacts; ATEX versions
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KFS flap string-loaded type flowmeter is used to evaluate flows in piping from DN25 up to DN600. Each flow indicator is calibrated according to customer requirements and equipped with a scale specific to the medium.
The measuring cell includes a flap spring-loaded moved by the medium. The angle of rotation of the flap changes according to the flow. A magnetic coupling transfers the movement to a pointer on a dial.
Options: Contact outputs: For process control purposes, the measuring device can be equipped with contacts, inductive or Reed type. Each contact (max. 2) is adjustable over the entire measurement range.
Features:
- KFS Standard: Stainless steel case with bayonet lock, IP66
- For gases and liquids
- DN 25 to DN 600
- Carbon steel, Stainless steel, PVC, PPH, PVDF
- Horizontal or vertical mounting
- Independent of viscosity
- ATEX version (optional)
- Model: KFS Standard / KFS-M40

- The primary measuring element of the flow meters is a flap, which is deflected by the flow of the medium. The deflection angle is a direct indication of the flow through the pipe.
- In the KLA the flap is gravity-loaded, so that the device may be used for the flow directions left to right, right to left and bottom to top.
- In the variant KLA-GS the fluid is directly observed through a sight glass.
- In the KFS the flap is spring-loaded, so that the device may be also used for the flow direction top to bottom.
- Kirchner und Tochter/BAMO offers 70 years of experience and German quality monitored and certified by the DVGW, in compliance with DIN EN ISO 9001:2015 and the Pressure Equipment Directive (PED) 2014/68/EU.






