Abstract: Backflow prevention is provided in connection with a device having one or more shut-off valves integrated with a double-check-valve backflow prevention device and/or housing. Preferably, a single housing encompasses two backflow preventer check valves, and upstream and downstream shut-off valves. Typically, end users cannot readily remove the shut-off valves (and/or their housing) from the backflow preventer check valves (and/or their housing). No flange or other connection between shut-off valves and backflow preventer check valves (and/or their housing) is required, reducing size, weight and labor requirements. The system can substantially reduce or eliminate potential for installation of double-check-valve backflow preventer devices without shut-off valves.

Abstract: A fluid valve assembly includes a housing, a valve, a rotatable driver received in the housing in operative communication with the valve, and an over-center linkage disposed between the driver and the housing. The housing includes an entrance to permit fluid flow into the housing and an exit to allow fluid flow out of the housing. The valve is disposed between the housing entrance and exit. The valve is configured in an open state to permit fluid flow through the housing and in a closed state to block fluid flow through the housing. Rotation of the driver from a first rotational position toward a second rotational position moves the valve from the closed to the open state, and rotation of the driver from the second rotational position to a third rotational position permits the valve to return to a closed state. The over-center linkage biases the driver to either the first or third rotational position.

Abstract: A flow divider, particularly for use in uniformly dividing a single incoming stream of liquid fertilizer into multiple outlet streams. The flow divider features a housing having a bore therein; a distribution sleeve which fits within the bore; and a distribution needle which slides within the distribution sleeve to evenly divide the incoming flow. Flow enters a distribution chamber formed between a tip portion of the distribution needle and the distribution sleeve, preferably flowing over a series of circumferential ribs located on the tip portion, and accelerates through a narrowing, flow-accelerating region between the distribution needle and the distribution sleeve. The flow is then discharged through a series of orifices in the distribution sleeve and out through a series of flow passageways radially arranged around the flow divider.

Abstract: A flow control valve having a seating surface formed on a valve element to contact a valve seat when the valve is closed has a shape of a part of a hypothetical spherical surface having a spherical center at a center of a supporting member. Therefore, the distance from the center of the supporting member to the seating surface is kept constant, and the valve element can be seated at a periphery of the valve seat without a gap, even if the shaft is inclined. Thus, the valve leakage is reduced. The supporting member supports a shaft connected to the valve element movable in an axial direction of the shaft. The center of the supporting member is aligned with a center of the valve seat. Movement of the supporting member in a radial direction of the supporting member is prohibited. Therefore, the center of the supporting member is not displaced from the center of the valve seat in the radial direction. Accordingly, the displacement of the shaft in the radial direction can be prevented.

Abstract: A ceramic control valve of a faucet including a water stopping seat which is provided in the periphery thereof with a retaining edge. The water stopping seat is disposed in a floating fashion in the cylindrical valve body of the ceramic control valve such that the retaining edge of the water stopping seat is retained in an annular recess of the cylindrical valve body. The service life spans of the washers of the stationary valve block of the ceramic control valve and the circular surface of the faucet are thus prolonged.

Abstract: In a fitting structure of a control valve in a variable capacity compressor according to the present invention, a step portion 92 is formed by connecting two taper surfaces 93a and 93b, the diameter of each of which decreases progressively towards the depth of a fitting hole 32 (in an inserting direction of a control valve 33) between each step surface portion 57, 67, 74, 91 of a fitting hole 32. A first taper surface 93a at a deep part of each step portion 92 has a smaller inclination in the inserting direction than a second taper surface 93b on the inlet side. The first taper surface 93a is formed so that its inner diameter on the inlet side is a little greater than the outer diameter of each O-ring 61, 70, 77 disposed on each step surface portion 57, 67, 74 in a free condition.

Abstract: A flow diverter, two position, plate type, assembly connected to a mixing valve always to deliver hot water to the same designated hot water inlet port of the mixing valve and cold water to the same designated cold water inlet port of the mixing valve. The flow diverter assembly including a housing, hot and cold inlet lines to be connected in one or the other of two positions and a plurality of interconnected plate members always to deliver hot and cold water to the same inlet ports of the mixing valve regardless of whether the hot or the cold water inlet lines are connected in one or the other positions.

Abstract: An improved structure for a water faucet control cartridge including an eccentrically arranged valve at the lower extent of the flow guide disk. The eccentrically arranged valve is of plastic construction and has an internal offset flow passage that enables water to flow from the water output seat of the faucet to the flow guide disk. The valve has a flat, semicircular, top surface for sealing against the flow disk.

Abstract: A compact diverting valve having a plurality of output ports for supplying various previously mixed hot water and cold water to anyone of a number of output ports. In some instances more than one output port may be supplied with previously mixed hot and cold water at a particular setting of the device. The system also includes a positive keying system into the diverter valve so that the valve actuator, manipulated by the user, has only one possible “rest” position for each selected output mode position. The valve also includes limit stops to prevent complete rotations of the valve actuator by the user an single spring C clips to facilitate removal of the component parts of the valve.

Abstract: A flow control assembly is provided with a cartridge which includes a body sized and shaped so as to be received in a housing of fluid handling apparatus, such as duplex strainers and diverter valves. The body has a first chamber and a second chamber adjacent to the first chamber. The first chamber includes a first fluid inlet and first and second fluid outlets, while the second chamber includes second and third fluid inlets and a third fluid outlet. A first valve is movably positioned in the first chamber. The first valve is movable between a first position, in which fluid passes from the first fluid inlet to the first fluid outlet, and a second position, in which fluid passes from the first fluid inlet to the second fluid outlet. A second valve is also movably positioned in the second chamber.

Abstract: A pressure balanced valve assembly includes a casing having a proportioning member received in a passage defined in the casing. Two inlets and two outlets are respectively defined in two opposite ends of the casing. The proportioning member has a central passage defined therethrough, two apertures defined through the wall of the proportioning member and communicating with the central passage. The position of each of the two apertures of the proportioning member is moved relative to the two inlets of the casing when the water pressure in the casing moves the proportioning member so as to change the opening of the two inlets of the casing by the wall of the proportioning member.