One. Scope: 1. explosive gas mixtures dangerous places: Zone 1, Zone 2; 2. explosive gas mixtures ⅡA, ⅡB; IIC; 3. Temperature classes: T1-T4; two. Product Features: 1. Main deputy cabinet combinations have around, up and down two kinds, the main cabinet for positive pressure in the sealed chamber, front door, front set up an observation window, deputy cabinet main resettlement positive pneumatic control systems. 2. With the front door automatic ventilation, ventilation delay, automatic qi, automatic control positive range of operating features. 3. The operation is simple and convenient, that is the end of the ventilation into the "positive operational" state. 4. With positive pressure protection (upper and lower), sound and light alarm, automatic power-off positive critical limit, door off, power outages and other emergency manual safety interlock protection. 5. Pressure ring type cable glands. 6. The product can be installed inside a variety of instruments, drives, soft starters, PLC programmable logic controller, computer control system, enabling local and remote control. Three. Explosion principle source of ignition using dielectric isolation explosion-proof measures to achieve the purpose of electrical explosion-proof cabinets principle positive pressure ventilation. Namely: the user all of the electrical components housed in a medium filled with positive pressure clean shell, the external environment, explosive gas mixtures can not come into contact with substances or dangerous temperature spark electrical components during normal operation generated so as to achieve the purpose of proof electrical company website: www.fangbaodianqi.com.cn Phone: 0377-60583218 Contact: Mr. Wang Mobile: 15938877272