VALVE HEAD OF SANITARY FITTINGS Russian patent published in 1999 - IPC

FIELD: equipment of sanitary fittings; applicable in control of flows of liquid working medium in system of engineering structures. SUBSTANCE: valve head has with axial hole and external thread for fastening in location of fittings. Body wall below thread has windows for passage of working medium. Installed in body axial hole is driving plastic turning rod. Rod middle part is made in form of smooth cylindrical section whose diameter is less than diameter of rod lower part, but exceeds diameter of upper part by value amounting to 0.02-0.4 of external thread diameter. Packing rings are installed in middle part with preload and possible axial motion. Upper turning ceramic disk is mounted for engagement with lower part of turning rod. Lower ceramic disk is fixed in body. EFFECT: convenience in use of valve head, reduced its cost, preserved reliability and prolonged service life. 3 cl, 3 dwg