Explosion-proof valve, also called negative pressure explosion-proof door, is a new generation series of negative pressure protection products developed by Dalian Three-phase Machinery Equipment Development Co., Ltd. The device adopts magnetic automatic opening and closing technology, and the action pressure is accurate, and it is automatically reset after the action, and no parking is required. It is a new product that protects the boiler body and the flue from being sucked. Camping Light,Camping Lamp,Rechargeable Camping Lights,Torch Lanterns,LED Tent Light Yuyao Flylit Appliance Co.,Ltd , https://www.flylitlight.com