Angle brass fire valves with an extended stem (for installing DPPK) refers to the fittings of fire equipment, which are installed in the internal fire water supply systems and are an integral part of water fire extinguishing at the facility with an operating pressure of 1.6 MPa and are used to control the supply of water with a temperature of up to plus 225 ° C in a fire hydrant. The angular design of the DU50 damper complies with the fire safety requirements established in the airbag 154-2000. An indispensable condition for installing the valve is water access, which is provided by connecting to a water supply network or a special fire hydrant.When installing internal fire hydrants, it is necessary to process the valve thread and then screw it to the water supply system, which allows you to immediately put the fire hydrant into operation. A complex design, like any other fire fighting equipment, requires inspection and testing. Fire hydrants are checked at least twice a year: performance check, working pressure, stuffing box seal. According to the fire safety standards NPB 154-2000, the use of ball valves in the fire-fighting water supply system is prohibited.