Abstract: In a single-control mixing cock the proportion of mixing between hot water and cold water and the delivery flow rate are controlled by plates (10,14) of hard material sliding one with respect to the other along plane surfaces and contained within a replaceable cartridge supported in oriented fashion within the body of the cock.In order to avoid the necessity of replacing the articulated joints for the control lever of the cock, plates (10,14), control means (17), guide and motion-limiting means (23), are contained in the shell (5,6) of the cartridge, said control means (17) being provided with a coupling means (22) complementary and reciprocally engageable with coupling means (33) of the control lever (31) connected by the articulated joint (29) to a cap which retains the cartridge within the body of the cock.

Abstract: A valve having a body with a valve seat and valve element and actuating means for moving the valve element toward and away from the valve seat with stop means in the body for stopping the movement of the valve element when the element is positioned against the valve seat. Fluid-actuated seal means are provided for sealing between the valve seat and the valve element and fluid-actuation means including a piston and cylinder which are in fluid communication with the seal means for actuation of the seal means. The fluid-actuation means are connected to the valve-actuating means whereby the seal means are pressurized and relieved by movement of the valve-actuating means.

Abstract: This invention relates to an improvement in a conventional double-disc gate valve having a vertically movable gate assembly including a wedge, spreaders slidably engaged therewtih, a valve disc carried by the spreaders. When the gate assembly is lowered to a selected point in the valve casing, the valve discs are moved transversely outward to close inlet and outlet ports in the casing. The valve includes hold-down means for guiding the disc-and-spreader assemblies as they are moved transversely outward and inward. If such valves are operated at relatively high differential pressures, they sometimes jam during opening. Such jamming has been a problem for many years in gate valves used in gaseous diffusion plants for the separtion of uranium isotopes.The invention is based on the finding that the above-mentioned jamming results when the outlet disc tilts about its horizontal axis in a certain way during opening of the valve.

Abstract: A ball check valve construction provides for safely controlling flow of compressed fluid under a normal operating pressure through a conduit line to a pressure actuated device. The valve construction includes a valve body formed with a ball check chamber in which is contained a ball normally biased by a spring element into an open position. The valve body is constructed with inlet and outlet pots having respective conduit elements connected thereto. Sudden pressure increase through the valve body resulting from an end of a conduit element becoming accidentally disconnected compresses the ball against the spring into contact with a sealing ring surrounding the spring, thereby to instantly interrupt flow of compressed air and prevent whipping or lashing about of the disconnected end.

Abstract: The specification describes a butterfly flap valve comprising a flap which on opening is adapted firstly to be axially displaced and then turned. For operating the flap a shaft extends transversely to the direction of flow into the housing of the valve and carries fixed on it an arm lever which is pivotally connected with the flap. In a plane spaced from the plane of the lever the flap is connected with a link which is pivotally connected with the housing. The link and the lever form an articulated quadrilateral which is staggered so as to lie in two planes.

Abstract: A ball valve with an actuator wherein a seal assembly with a combination O-ring swivel and seal for producing a tight seal is hidden in a pocket isolated from the flow of fluid through the valve by an inlet reentrant flange and the valve body. The swivel and other parts of the seal assembly including but not limited to the seal thereof, because the O-ring swivel makes the seal assembly mount tenuous and subject to chattering and vibration, can be damaged. This is true because the seal assembly seal receives large and rapid impact loads. The chattering and vibration also thereby produce serious damage to and wear on the seal assembly seal. A great deal of chattering and vibration is usually caused by exposing the seal assembly to the fluid passing through the valve. In the ball valve disclosed herein this is prevented by mounting the seal assembly in the isolated pocket. The valve disclosed herein also has other features.