The piston type flow switch is installed on a standard valve body with internal thread connection. It is self-supporting and thus suitable for installation dimensions. Inline installation and end fittings are DN 15 … DN 20 female thread, DN 25 … DN 80 flange. The preferred installation position is vertically upright in horizontal pipelines. There is a flow direction arrow on the valve housing, which must always points in the flow direction. Approved by German Lloyd, Certificate No. 54 627 – 71 HH.