Explosion proof roof fan
max. 44 800 m³/h | DVV-EX
Systemair
* Speed-controllable via frequency converter
Roof fans DVV-Ex are designed to exhaust potentially explosive atmospheres (mixtures of air and inflammables such as gases and steam) from explosion hazardous areas. The DVV-Ex fans have impellers with backward-curved blades and IEC motor in explosion protection "flameproof enclosure" - EEx d. The casing is manufactured from seawater-resistant aluminium and the base frame from galvanised steel, with a copper inlet cone. Suitable for exhaust from zones 1 or 2, field of application II, for gases of groups A and B and temperature classes T1 to T4. The fans are classified to category 2G. Terminal box in explosion protection "increased safety" - EEx e is mounted on casing. To enable protection of motor from overheating these fans have serial built-in thermistors (PTC) with external leads (connection to U-EK230E motor protection relay as accessories possible). On request fan can be factory fitted with sound attenuator on outlet (as DVVI-Ex fan).
