Abstract: A flow control valve includes a valve inlet configured to receive a fluid, a valve outlet configured to output the fluid, and a valve member assembly for controlling the fluid flow through the flow control valve. The valve member assembly and the valve inlet are configured such that, when in use, fluid flowing through the flow control valve exerts substantially no net force on the valve member assembly.

Abstract: A backwater valve has a hollow valve body with an inlet defined by a vertical surface, an outlet, and a bottom. A pivoting valve member is pivotally movable about a pivot axis between a normally open position along the bottom of the valve body and a closed, vertical position sealing the inlet. The valve member has a hinge end, the pivot axis being positioned at the hinge end. An overbalancing member carried by the valve member biases the float toward the closed position. The overbalancing member comprises at least one of a counterweight and a magnetic element. The overbalancing member is positioned at the hinge end and spaced from the pivot axis such that the overbalancing member is vertically above the pivot axis when the valve member is in the open position and horizontally over from the pivot axis when the valve member is in the closed position.

Abstract: The device to adjust and control water levels is an apparatus that functions to secure a float valve at the bottom of an outdoor fountain without permanent installation involving screws, nuts, bolts and the like. The device includes a solid body, a bracket and a decorative float. The bracket is easily assembled to the solid body and retains the body of the float valve submerged in the fountain.

Abstract: This invention is a kind of toilet tank fill valve internally sealed with ceramic slices. It includes a double layered water passing tube, a float, a sleeve, and a one-way valve. It works independently without a tank ball. It solves water leakage problem completely and has a service life of 50,000 flushes.

Abstract: A device for providing remote indication of the opening of a weighted pallet type tank vent in which a permanent magnet is attached to the end of the pallet guide shaft distal to the pallet. A magnetic induction sensor is secured to the outside of the shaft guide to sense movement of the magnetic field produced by the magnet and produce an electrical signal which may be transmitted to a remote location to indicate that the pallet has opened and relieved pressure in the tank.

Abstract: A retention gate (20) is pivotable about a horizontal pivot shaft (22) mounted near the gate's upper edge and is located behind the overflow sill (14) of a storage drainage opening (12), said retention gate in its closed position being in sealing contact by its lower edge (30) with the overflow sill and furthermore being loaded by a counterweight (42) mounted on the outflow side at a distance from the pivot shaft (22), said counterweight generating the closing force required against the inflow side pressure. The retention gate (20) when in its closed position runs from its lower edge in the downstream direction at an average slope of 20.degree.-60 .degree. relative to the vertical, and the counterweight (42) rigidly affixed to it is guided in such manner that it generates in each gate position a closing torque that approximately matches the torque generated by the amount of drained water required to keep constant the level (24).

Abstract: A buoyed flapper valve comprises a flapper which is capable of closing an exit of a dipleg or standpipe, which is also connected to a counterweight and a float. The float has sufficient buoyancy to as to overcome the weight of the counterweight when the valve is submerged in a bed of particulate material. The flapper valve is preferably employed as a dipleg check valve within a reactor, e.g., a riser reactor system, and can be used under a variety of operating conditions including both submerged and non-submerged operating conditions.

Abstract: A liquid level sensor connects a buoyancy device in a vessel to an end of one member of a two piece mechanical linkage projecting through a flexible pressure sealed opening in the closed end of the sensor body with the outer ends of the two members overlapping and connected by a pivot point. The second member is rigidly secured to a sensor body and defines a fluid pressure receiving passage which connects with a diametrically disposed bore within which a poppet valve is mounted. The poppet valve normally prevents the flow of pressure through the diametrical bore and outward through a radial outlet in the sensor body to actuate an alarm. Upon a deviation of the liquid level in the vessel from the desired level, the buoyancy device produces vertical pivotal movement of the one member of the two piece mechanical linkage which forces the poppet valve to a position permitting pressured fluid to flow therethrough and to energize an alarm.