Tnda series explosion-proof gas emergency shut-off valve (gas solenoid valve) of Chengdu teenda Gas Equipment Co., Ltd. (hereinafter referred to as teenda company) is a safety emergency shut-off device for gas pipeline. It can be connected with the gas leakage alarm system or with the fire control and other intelligent alarm control terminal modules, so as to realize the on-site or remote automatic / manual emergency cut-off of gas source and ensure the safety of gas pipeline transportation and gas consumption. The product meets the relevant requirements of gb3836.1-2010 "explosive environment Part 1: General requirements for equipment" and gb3836.2-2010 "explosive environment Part 2: equipment protected by flameproof enclosure" d "; the product has the advantages of quick cut-off function, good sealing performance, low power consumption, high sensitivity, reliable action and convenient use. The valve must be opened manually to meet the requirements of safety management and accident handling.