Valve head is used as an assembly of water-folding fittings (mixer) for cold and hot water with a nominal pressure of up to PN 1.0 MPa (10 kgf / cm2) and a temperature of up to + 175 ° C, which is installed in buildings for various purposes. Material of the main parts : brass LS 59-1. Threads for connecting pipelines, D – М 18×1. The principle of operation of the h / g is very simple: the valve-axle box with a rubber collar is equipped with a stem, which, during a screw gear, extends, tightly closing the valve seat with a rubber gasket. Uncomplicated design and interchangeable parts make repairing the screw head and replacing the rubber gasket much easier than the ceramic counterpart.