The variable area principle is still one of the most-used measurement principles in flow engineering. As well the new kobold messring type vkp flowmeter works on this approved principle. Instead of the conical measuring pipe generally used, a conical mandril is placed inside a housing made out of robust, impact resistant polysulphone, on which there is a float with a sharp-edged orifice.
The incoming medium flows through the float`s orifice and lifts it up versus the power of a stainless steel spring onto the flow depending height. The actual flow rate can directly be read off a scale affixed to the outside of the housing.
With the combination of spring and conical mandril this series of meters is far more compact than other commonly used devices with a conical measuring pipe. They are therefore ideal for measuring flow rates in machines and aggregates.
These devices can be installed in any position without an additional calibration, making them ideal as a transportable measuring device or for installation in flexible pipes [e.G. Hoses]. The use of a sharp-edged orifice float makes the devices relatively insensitive to viscosity and they are consequently highly suitable for flow measurement of oil, since its viscosity alters with changes in temperature.
A specially designed float, fitted with grooves around the outside periphery, also permits the measurement of impure fluids containing particles of up to 400 µm.
Measuring ranges between 2 and 100 l/min h2o or oil are available.
The optional connections are g1" and 1 npt. Available as an extra are brass solder pipe connections, pvc glue-in connections or g 1/2" or g 3/4" threaded connections.
The simple construction of the device and the use of just a few parts keeps the price of the instrument low and makes it eminently suitable for large scale use.
The devices can be equipped with an adjustable, switch for monitoring flow rates.
