Gericke, Regensdorf, Switzerland, points out that rotary valves are required to feed, convey or isolate powders of widely differing physical properties. In the construction, chemical, environmental or mineral industries they handle specific abrasive products such as glass cullet, carbon, cement, dolomite and quartz. They are therefore exposed to risk of major
abrasion damage. Wear to the rotor and also to the body occurs even if the rotary valves are made of hardened materials and alloys. Such treatment will prolong the working life but will not avoid abrasion completely.

The result is that sooner or later, the rotary valve has to undergo refurbishment with worn out parts being replaced, otherwise leakage will increase, and the performance of the valve will be compromised. The OEE (overall equipment effectiveness) will decrease. Gericke RotaVal, the company’s UK subsidiary, has developed the EHDM rotary valve for just such demanding applications. The objective is to increase the valve’s lifespan, reduce downtime and to facilitate maintenance so that it can be performed in situ. This has been achieved by a design where all components at risk of abrasion damage can be easily replaced.

The EHDM valves are available in all sizes of the Gericke rotary valve range. Gericke RotaVal manufactures various types of rotary and diverter valves. For hygienic applications, the extendable HDMF models have proved successful and can even be equipped with the RotaSafe™ contact detection device. www.gerickegroup.com; www.rotaval.co.uk
 

Gericke RotaVal EHDM rotary valve with replaceable wear parts

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