Dosimeter with dosing valve - operated by main fluid pressure, which also keeps valve and seat clean

摘要

A dosimeter has an insertable housing for injecting additive material to fluid in a channel. A hopper is connected to the channel via a dosage shut-off valve (9) controlled by a rod (23) mounted axially in the housing positioned according to the main fluid press. incorporates simple precautions to maintain cleanliness of the valve element and seat. The rod is moved by a baffle operated by the fluid press., and the valve seat is connected to the flow section via a bored guide upstream from the baffle. The baffle is a turbine wheel (27) with inclined blades (7). The fluid press-on the blades rotates the rod, valve and baffle so that the valve and seat (11) are in frictional contact at each axial position.