GB901925A - Improvements in or relating to valve-like devices for controlling the flow of fluid - Google Patents

Abstract

901,925. Valves; fluid-pressure servomotorcontrol systems. AEROJET-GENERAL CORPORATION. Jan. 19, 1960, No. 1949/60. Class 135. A liquid flow control valve comprises a housing 10 having an inlet 27 and an outlet 11 connected by a passageway and means, for varying the cross-sectional area of the latter, in the form of a resilient material 26 having passages or interstices therein, and pressure can be applied to the resilient material in order to vary the cross-sectional area of the passages or interstices, thereby controlling the flow of liquid therethrough. As shown in Fig. 1, the resilient material is in the form of rubber balls located between stationary and movable perforated plates 18, 25 so that upon axial movement of the plate 25 via a handle 29, the rubber is compressed and so reduces or completely prevents the flow through the valve; wire-mesh screens 19, may be provided. In a modification, two packs of balls of different degrees of hardness are located in the valve body and separated by a wire mesh screen. In the construction shown in Fig. 2, the resilient material 47 is located in a deformable bag 36 mounted in a housing 35, pressurized fluid being admitted through a pipe 56 to act on the bag and thereby compress the resilient material. The resilient balls may be replaced by a number of rubber tubes located in the valve body and acted upon either axially by manual means or radially by fluid-pressure via a resilient bag as described above; the tubes may be replaced by a block of rubber having a plurality of passageways formed therein. In the further embodiment shown in Fig .3, applied to a float-operated flushing-valve, a movable perforated plate 64 is actuated by the pressure of the controlled liquid acting on a diaphragm 68 connected to the plate, the liquid pressure being varied by a valve 75A. In operation, the liquid pressure acting on the diaphragm compresses the balls and thereby maintains the valve closed until a valve 77 controlled by a float 79 opens and relieves the pressure on the diaphragm via a bleed pipe 76. In place of the rubber balls or tubes a body of sponge rubber may be used.