Accessories

The devices provide the high safety level and are designed to be used in the places, in which the explosive atmospheres are likely to occur, caused by gases, vapours, mist or air-dust mixtures.

VAV air flow regulators are used for the automatic control of a stream flowing through the ventilation air ducts in the air supply and in the exhaust part of the installation.Ex devices ensure high safety level and they are intended for locations with likely explosive atmospheres caused by gases, vapours, mists or air-dust mixtures. Ex regulators are designed in accordance with ATEX 2014/34/ EU as devices from group II category 2 intended for use in explosion hazard zones 1, 2, 21 and 22. The manufacturer’s ATEX Certificate is available for electric components. This regulator, according to PNEN1751, is classified as C2 (air leakage class C for the housing, air leakage class 2 for the partition).

The housing and the shutter of the regulation damper is made of the zinc-plated steel sheet or on special request it is made of stainless steel 1.4301. The dumper partition is equipped with rubber sealing guaranteeing tightness with the complete partition closure. The damper partition axis is placed in the bearing made of antistatic plastic or brass. The measuring strip is an accumulatingmeasuring element. The strip is made of aluminium profile with properly distributed impulse openings. The control-drive system of the flow regulator is a unit consisting of the static differential pressure sensor, actuator and controller (the controller is placed beyond the explosion hazard zone according to diagram 5)