The fire extinguishing ball device is composed of a foam shell, a dry powder driving device and an ABC dry powder fire extinguishing agent. The external part of the fire extinguishing ball device is wound with a cross-shaped lead. When the external lead wire is ignited, the driving medium is activat

Ball valveBall valves are evolved from plug valves. It has the same 90° rotation action, except that the plug body is a sphere with a circular through hole or passage through its axis. The ratio of the spherical surface to the passage opening should be such that when the ball is rotated by 90°, all

Introduction:The helium gas cylinder belongs to the national standard non-refillable steel cylinder and is designed and manufactured according to the national standard GB17268-1998. It is manufactured by the production line of ISO9001-2000 quality system certification by the General Administration o

The oxygen cylinder is the storage and transport pressure vessel, and there are some special requirements for the structure and application of the pressure vessel. Therefore, in the test, besides the relevant specifications of the pressure vessel, there are special specifications. So what do you nee