Rotary Valves


We supply high quality and efficient rotary valves, an important part of any extraction system.

Nederman’s NRSZ rotary valve is used to transfer material between two separate systems. In pneumatic conveying systems, discharge is usually required from the filter or cyclone to the silo at atmospheric pressure. Our state of the art rotary valves are ideally suited to this application.

Versatile and tough

The NRSZ rotary valve can be used for most material types, though the particle size must not be greater than 13 x 13 x 13 mm (.5 x .5 x .5 in). This rotary valve is modular, making it easy to fit and is built to be robust. The valve is constructed in heavy steel plate while the rotor of each module is also equipped with an elastic clutch. This reduces the possibility of damage while it is being used and maximises the life of the unit. The rotor itself has special rubber seals, which provide an effective airlock between the inlet and the outlet.

This type of rotary valve is certified for explosive dusts type St1 and St2 and is recognised as a protective system according to ATEX definition.

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