GB384422A - Valve - Google Patents

Abstract

384,422. Stop valves. ZAGORSKI, J., 33, Kantstrasse, Charlottenburg, Berlin. Nov. 23, 1931, No. 32388. [Class 135.] Casings ; closure members ; materials, special.-In valves having coaxial inlet and outlet passages 2, 8, Figs. 2, 3, 4 and 7 and a balanced or partly balanced cylindrical plunger-like valve member 10, Figs. 4 and 7, the valve casing 1 has walls provided with a stream-line baffle 5 and with curved surfaces 3, 4 which constrain the liquid stream, or the outer layers thereof, to flow at the seat opening in curves having the form of conical spirals. The baffle 5 may be central, as in Fig. 2, or at one side, as in Fig. 3. When the valve seating is oblique, as in Fig. 4, the valve member 10 may be formed cone-like, as at 11, to assist in guiding the fluid on its spiral path. The valve plunger is packed by a stuffing-box and the packing may be divided into two longitudinal parts by a partition 28, Fig. 7, and the valve member is loosely attached to the headed valve spindle, as shown ; the spindle may also be separately packed. The valve member may be provided with longitudinal balancing passages opening above the plunger in conjunction with an internal balancing valve on the spindle end. The valve seating ring 22a may be of hard nickel-chrome steel, and the valve a facing ring 24 of plastic metal, such as the monel-metal alloy, nickel, silver, or of annealed copper, both secured in undercut grooves, as shown. The closure member may fit over the upper part of the seating ring on the outer and inner sides, and within an upstanding shoulder 27, as shown.