Double-girder bridge crane QB

explosion-proof

Mainly consists of bridge structure, lifting mechanism, crane traveling mechanism, electric equipment etc. Explosion-proof performance of all motors and electrical equipments of QB type explosion-proof overhead cranes is in line with GB3836.2-2000 "for explosive gas atmospheres with explosion-proof electrical equipment-Part 2: Flameproof "d", and the whole performance is in line with provisions of the standards of explosion-proof bridge cranes JB/T5897-1991. The proof marks are Exd Ⅱ BT4 and Exd Ⅱ CT4. Applied to sites where explosion transfer capacity is not higher than the II B or II C-class, and the sites with explosive air mixture formed with inflammable gas (or steam) and air whose factory ignition temperature groups of not less than the T4 group. The applicable hazardous area: 1 division or 2 division (refer to GB3836.1-2000). √ For explosive gas atmospheres. √ Span Length: 7.5~31.5 m. √ Lifting Capacity: 5~75 ton. Overall Feature The machine: Novel structure, attractive appearance and good technics; Operation: Flexible and smooth, safe and reliable Mechanical Part Double girder, welding box beam, camber meet national standard; Adopt high quality carbon steel, Q235B or Q345B; Main and end girder connected through level 10.9 high-strength bolt Crane drive: IP54 or IP55, level F insulation Efficiency brake, long life