Rotary valves – ATEX protective system

Rotary valves are used to transfer materials between two separate systems, for example from beneath the dust collector directly to the container. Rotary valves of FZC type have modular structure and are available in different lengths and of different capacities.

Rotary valve – an explosion isolation device used for transferring bulk materials

The rotors are equipped with rubber seals which ensure effcient separation of air between the inlet and outlet. The valve housing is made of steel sheets.

The main function of rotary valves is to prevent the pressure inside one dedusting device from spreading to the outside of the valve and, at the same time, empty the dust collector from the separated material (dust, chips etc.).

Our rotary valves of FZC STD type comply with the essential provisions for devices of the Directive 2014/34/EU of the European Parliament and of the Council of 26th February 2014 on the harmonisation of the laws of the Member States relating to equipment and protective systems intended for use in potentially explosive atmospheres.

What is more, our rotary valves FZC STD work as explosion isolation system and are devices certified by a notified body (No.: 1453, GIG, Mikołów, Poland).

Available devices with the following marking:

St2 II 1/-D Ex h IIIB T125stC Da/-
St2 II 1/2D Ex h IIIB T125stC Da/Db
St2 II 1/3D Ex h IIIB T125stC Da/Dc
St2 II 2/-D Ex h IIIB T100stC Db/-
St2 II 2D Ex h IIIB T125stC Db
St2 II 2/3D Ex h IIIB T125stC Db/Dc

Basic technical data and protective system parameters:

version for explosive dust of the following class:
– St1 i St2 (K_{st max} 300 [m bar/s])

endurance/ reduced explosion pressure:
– p_red ≤ 50 kPa

EU Type Testing certificate

Certyfikat badania typu UE, celkowy zawór obrotowy izolujący wybuch, śluzy celkowe atex, śluzy obrotowe atex, śluza przeciwwybuchowa, zawór obrotowy przeciwwybuchowy, zawór celkowy przeciwwybuchowy, system ochronny atex

Location of the rotary valves:

– between the filter and the silo
– between a cyclone and a silo
– between a filter and a container
– between a cyclone and a container
– between a filter and a pneumatic transport installation
– between a cyclone and pneumatic transport

Advantages:

up to three times higher efficiency when compared to the valves available on the market
long and failure free life of the device
6 mm thick rubber blades made of high strength and abrasive-resistant materials, with additional linen reinforcement
wider discharge opening up to 350 mm
the rotor produced in welding technology and reinforced with the use of additional bulkhead connectors – wider discharge chambers between the blades are obtained
chain clutch – higher stability
equipped with a NORD cylindrical motoreducer as standard
equipped with a protective casing for the motroreducer as standard
mild start-up at valve working initiation
easy maintenance including demounting of the motoreducer and replacement of rubber blades
modular structure enables extension
spare parts availibility from the warehouse in Poland

Rotary valve type	Rotation speed [rot/min]	Motor power [kW]	Maximal theoretical efficiency [m³/h]	Efficiency at 50% load [m³/h]	Approximate weight of a rotary valve with a motoreducer [kg]
FZC-500-7-STD/EX	21	0,75 or 1,1	103	52	130
FZC-750-7-STD/EX	21	0,75 or 1,1	155	78	185
FZC-1000-7-STD/EX	21	1,1; 1,5 or 2,2	207	103	225
FZC-2000-7-STD/EX	21	1,1; 1,5 or 2,2	414	206	420
FZC-3000-7-STD/EX	21	1,1; 1,5 or 2,2	621	309	600

Basic technical parameters of FZC type rotary valves

Basic dimensions:

Basic module dimensions, rotary valve types 500, 750 and 1000.

Extended valve module, rotary valve type 2000 and 3000.