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.

Flap type Flowmeter Instruments