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Home > Products > Material handling and separation > Rotary Valves > Nederman NRS Ex rotary valves

Nederman NRS Ex rotary valves

Continuously empty combustible dust from your dust collector

The NRS type 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. This is an ideal application for the NRS type rotary valve.

The rotary valve can be used for most material types, though the particle size must not exceed 13 x 13 x 13 mm (.5 x .5 x .5 in).

The NRS type rotary valve is modular and robustly constructed in heavy steel plate. The rotor of each module is equipped with an elastic clutch. This reduces the possibility of damage in use and maximises the life of the unit. The rotor has special rubber seals, which provide an effective air lock between the inlet and the outlet.

This type of rotary valve is also available in an ATEX certified version for explosive dusts type St1 and St2. The NRSZ is a protective system according to ATEX definition.

Explosive dusts type St1 may have Kst up to 200 bar m/s. The Pred must be less than 90 kPa.

Explosive dusts type St2 may have Kst up to 300 bar m/s. The Pred must be less than 60 kPa for NRS Ex 4 St2 and less than 20 kPa for NRS Ex 10, NRS Ex 20 and NRS Ex 30 St2.

The rotary valve type NRS Ex 10-Q is also available in ATEX certified version for explosive dusts type St1. Explosive dusts type St1 may have Kst up to 200 bar m/s. The Pred must be less than 25 kPa.

 

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