Product design: For operating temperatures of -20 °C <= Ta <= +40 °C. Special properties: Axial roof fan, explosion-proof, medium gas. Explosion protection and approvals according to ATEX and IECEx. Ex II 2 G Ex eb IIB + H2 T3/T4 Gb / Ex II 2 G Ex h IIB + H2 T3/T4 Gb. Operating temperatures depend on temperature class: T3 -20 °C <= Ta <= +60 °C, T4 -20 °C <= Ta <= +40 °C. For all gases and vapors of Ex groups IIA and IIB and additionally qualified for hydrogen. MAICO Ex fans meet the safety requirements of the European Directive RL 2014/34/EU for equipment and protective systems in potentially explosive atmospheres. For Zone 1 and 2. Ignition protection types: e - increased safety and c - structural safety. Protection class IP 64. Base plate, inlet nozzle and rain protection hood made of galvanized sheet steel. Blow-out direction horizontal. Sturdy transport eyes enable transport by crane. Can be switched for ventilation or exhaust. Impeller: Axial impeller made of conductive plastic. Balance quality of the motor-impeller combination G 6.3 according to category BV-3 in accordance with ISO 14694. Air flow direction: The air flow direction is marked. Standard exhaust air operation, air flow direction blowing over the motor. Motor: Robust three-phase motor with ball bearing, maintenance-free. Reversible. Reversible operation: The volume flow is reduced by approx. 35% if the air flow direction is abnormal. Operating mode S1 (continuous operation). Speed control with transformer TR... possible. Exception: DZD 35/2 B Ex... The temperature in the fan motor is monitored by PTC thermistors. The PTC thermistors must be connected to a trigger system (safety device according to Directive 2014/34/EU) that permanently disconnects the fan from the power supply if the temperature is too high. The MAICO PTC thermistor tripping system MVS 6 or TMS is recommended as the tripping system. Electrical connection: Connection cable approx. 1.7 m long. Separate terminal box, explosion-proof, with cable gland. Safety instructions: Only operate the fan with free intake or exhaust if the impeller is protected against contact in accordance with DIN EN ISO 13857, e.g. B. with protective grille SG.Article: DZD 25/2 B Ex e, delivery volume: 1600 m3/h, speed: 2870 1/min, impeller type: axial, air direction: ventilation, speed controllable: yes, reversibility: yes, voltage type: three-phase current, rated voltage: 400 V, mains frequency: 50 Hz, rated power: 140 W, cosphi: 0.69, INom: 0.29 A, Imax at UNom: 0.39 A, protection class: IP 64, thermal class: F, installation location: roof, installation position: vertical, material: sheet steel, galvanized, housing material: sheet steel, galvanized, color: galvanized, weight: 14.57 kg, weight with packaging: 16.99 kg, nominal width: 250 mm, width: 570 mm, height: 325 mm, depth: 570 mm, width with packaging: 610 mm, height with packaging: 360 mm, depth with packaging: 610 mm, EX designation according to ATEX directive: Ex II 2 G, EX designation according to standard: Ex eb IIB + H2 T4 Gb / Ex h IIB + H2 T4 Gb, Ta ambient temperature:-20 °C <= Ta <= +40 °C, IA/IN: 5.9, time tA: 69 sec, operating mode: S1, PTC DIN 44082: M 100, EC type examination certificate: TV-A 19 ATEX0104 X, IECEx EPS 19.0020X, temperature class: T4, thermal class of insulating materials Th. Cl.: 155 (F)