Flow Rates Checked in Suspension

The KDF/KDG low-volume flow meters or monitors by KOBOLD Messring GmbH (Germany), enable low flow rates to be checked reliably and cost-effectively. The devices, which operate according to the suspended float principle with a stainless steel ball that floats in the media flow, come in special designs for fluids and for gases (air). The devices with stainless steel housing are installed vertically, with a flow direction from bottom to top, using 1/4” threads or 8-mm-diameter hose clips. A needle valve allows the media flow to be set such that the measuring ball is positioned for optimum suspension. It is quick and easy to read off the respective flow rate by directly consulting the measuring tube made of robust borosilicate glass.

The version for fluid KDF media has 9 measuring ranges for water from 0.25–2.5 l/h to 16–180 l/h. With 15 measuring ranges, between 0.5–5 l/h and 500–5000 l/h for normal air, KDG flow meters can be used for many applications. Ring initiators can be fitted optionally as limit-value transmitters, enabling preset flow rates to be monitored contact-free from the outside.

The devices with upstream or downstream differential pressure regulators are a simple and practical means of maintaining constant flow rates. The robust, stainless steel housing contains a valve with a FPM or PTFE membrane, which ensures that the flow rate on the relevant side is maintained within the preset range.