RU2002114079A - Valve head - Google Patents

Claims (5)

1. A valve head comprising a threaded housing with an inlet and a cavity, a shutter in the form of movable and stationary flat ceramic washers with bores, a stepped drive rod, the cylindrical part of which is located in the cavity, is sealed with rubber seals, two centrally made on the stem end symmetrical protrusions interacting with the movable washer, and the stationary washer is located in two centrally symmetric grooves of the housing, sealed and fixed with a rubber seal of the pressure gauge and the limiter against overpressure when installed in the sanitary fittings, while in the cylindrical surface of the body there are two centrally symmetric output windows with the formation of a jumper at its input end, on the opposite side of the input end of the body an emphasis is made in the form of a segment cutout interacting with a rotation limiter, which is a pin radially mounted on the rod, as well as an element for fixing the valve head in the plumbing fixture, characterized in that the rubber seal When installed in a plumbing fixture, the overpressure limiter and limiter are a single unit made of a rubber sleeve reinforced with a metal ring, while a working clearance is formed between the said metal ring and the inlet end of the body, and the ratio of the height of the body from the inlet end to the thread to the jumper width makes up

2. The device according to claim 1, characterized in that the two centrally symmetrical grooves in the side surface of the housing extend along the lower end of the movable ceramic washer, forming an additional channel for the flow of the working fluid. 3. The device according to claim 1 or 2, characterized in that the said two centrally symmetrical protrusions of the rod interacting with the movable washer form a system for compensating for irregularities in the surface of the washer, while the ratio of the area of the protrusions interacting with the plane of the movable washer to its area is 0.08 ÷ 0.2. 4. The device according to claim 1, or 2, or 3, characterized in that a slide bearing made in the form of a caprolactam ring is installed on the rod at the junction of the stem portion of the smallest diameter to the stem portion with a larger diameter. 5. The device according to claim 1, or 2, or 3, or 4, characterized in that the fixing element of the housing in the sanitary fittings is made in the form of a fixed stop flange, as a unit with the housing.