LOCKING-RELEASING HEAD FOR A POWDER FIRE EXTINGUISHER

摘要

The inventive locking-releasing head relates to pumped powder extinguishers which eject a fire extinguishing powder at a positive pressure and can be used as primary extinguishing means for fighting class A (solid substances), class B (liquid substances) and class C (gaseous substances) fires, fires of electrical devices under tension equal or less than 1000 V and also for fires on road, railway and river transport. Said locking-releasing head for a powder fire extinguisher comprises a body (1) provided with elements for fixing to the container of said extinguisher, a handle connected to the body (1), a locking unit provided with a rod (16) carrying a valve fixed thereto, a control lever (13), a siphon tube (21), a pressure indicator (2) and a spraying nozzle (19). Said pressure indicator (2) is arranged on the valve rod (16) in which a hole is embodied in such a way that it connects the under-membrane cavity of the indicator to the under-valve cavity of the head. The inventive structural design ensures high technical and economic characteristics, in particular makes it possible to preserve the long-term tightness and to carry out an impulse operation mode.