Abstract: An electric motor actuated stop/check valve for industrial use such as liquid pumping systems which has a controlled opening and closing rate when liquid flow is in a forward direction but closes quickly upon reverse flow of liquid with no action from the electric motor actuator. A valve disc having an elongated disc stem contacts a valve seat when in a closed position to stop liquid flow. Actuation of the valve is by an electric motor which provides movement to an actuator rod which contacts the disc stem. The disc stem and the actuator rod are not connected which allows the valve disc and disc stem free movement, by action of the momentarily back-flowing liquid, to a back-flow preventing closed position when liquid forward flow is reversed. No action by the electric motor is required. A spring biasing the valve disc toward the closed position and a hydraulically operated valve closing-speed regulator reduces or eliminates slamming of the valve disc against the valve seat.

Abstract: A surge anticipator safety check unit for use in a liquid system for preventing damage to a pump and associated components of the system in the event of a loss in pumping pressure is provided. The unit includes a surge anticipator portion having a surge anticipator valve assembly, a hydraulic or electronic controller for operating the surge anticipator valve assembly depending on the conditions in the liquid distribution system, and a sensor associated with the controller for sensing the conditions in the downstream portion of the piping relative to the safety check unit. The surge anticipator safety check unit operates in conjunction with the operation of a check valve member in the piping and an air vacuum portion and operates to eliminate or minimize surge in the system. The valve assembly includes a solenoid plunger connected to a valve member. The plunger is operated by the controller for opening and closing the surge anticipator portion.

Abstract: A plug valve includes a valve body, an actuator, and an adapter. The valve body has an actuator end, a valve body end, and a stem chamber extending through said adapter. The valve body end of the adapter provides a valve body cover that can be attached to the valve body. The actuator end of the adapter is attached to the actuator by a threaded member extending through a set of holes of the adapter and the actuator. The adapter can have a bleedway in communication with the stem chamber for showing leakage. The holes of the adapter can be conforming to ISO standards for actuators.

Abstract: An electric motor actuated stop/check valve for industrial use such as liquid pumping systems which has a controlled opening and closing rate when liquid flow is in a forward direction but closes quickly upon reverse flow of liquid with no action from the electric motor actuator. A valve disc having an elongated disc stem contacts a valve seat when in a closed position to stop liquid flow. Actuation of the valve is by an electric motor which provides movement to an actuator rod which contacts the disc stem. The disc stem and the actuator rod are not connected which allows the valve disc and disc stem free movement, by action of the momentarily back-flowing liquid, to a back-flow preventing closed position when liquid forward flow is reversed. No action by the electric motor is required. A spring biasing the valve disc toward the closed position and a hydraulically operated valve closing-speed regulator reduces or eliminates slamming of the valve disc against the valve seat.

Abstract: An electric motor actuated stop/check valve for industrial use such as liquid pumping systems which has a controlled opening and closing rate when liquid flow is in a forward direction but closes quickly upon reverse flow of liquid with no action from the electric motor actuator.

Abstract: An electric motor actuated stop/check valve for industrial use such as liquid pumping systems which has a controlled opening and closing rate when liquid flow is in a forward direction but closes quickly upon reverse flow of liquid with no action from the electric motor actuator.

Abstract: An electric motor actuated stop/check valve for industrial use such as liquid pumping systems which has a controlled opening and closing rate when liquid flow is in a forward direction but closes quickly upon reverse flow of liquid with no action from the electric motor actuator. A valve disc having an elongated disc stem contacts a valve seat when in a closed position to stop liquid flow. Actuation of the valve is by an electric motor which provides movement to an actuator rod which contacts the disc stem. The disc stem and the actuator rod are not connected which allows the valve disc and disc stem free movement, by action of the momentarily back-flowing liquid, to a back-flow preventing closed position when liquid forward flow is reversed. No action by the electric motor is required. A spring biasing the valve disc toward the closed position and a hydraulically operated valve closing-speed regulator reduces or eliminates slamming of the valve disc against the valve seat.

Abstract: A safety check unit for use in a liquid distribution system for preventing damage to a pump and associated components of the system in event of loss in pumping pressure. The unit provides a check component to prevent back-flow of the liquid when the pump is shut down, and provides protection against a possible vacuum condition in the system by introducing air to the system; protects against damage by a surging back-flow of liquid by opening a relief port of the unit; and protects against air in the system by use of an air relief mechanism of the unit.

Abstract: A self-cleaning stationary basket strainer has a housing with an inlet adjacent the top and an outlet adjacent the bottom, with a stationary strainer basket contained therein spaced from the wall of the housing. A flush discharge opening and a backwash discharge opening and provided in the closed bottom of the housing. A hollow backwash conduit is provided adjacent the inner surface of the strainer basket, adapted to move about the inner periphery thereof, and has a passage in the wall thereof communicating with a chamber in the conduit. A discharge section on the hollow backwash conduit communicates with the backwash discharge opening in the housing, the backwash discharge opening sealable when not in use. A scraper blade and extension member are provided on the hollow backwash conduit forming a channel which communicates with the passage. A rotatable brush may also be used which moves about the inner periphery of the strainer basket and brushes the inner surface of the strainer basket.

Abstract: A stepper for use between a transducer subjected to variable pressure, heat or liquid level for converting the continuous output signal of the transducer with all of its variations, both of significant magnitude and those of insignificant importance, into a continuous stepped output signal that increases or decreases the current to a transducer responsive control unit, particularly a servo amplifier, which stepped signal eliminates all minor and unimportant fluctuations from the output current from the transducer. The stepper also includes a sequence of voltage regulators such as potentiometers in the circuits between the stepper and the servo amplifier by means of which the magnitude of the current flow of each step to the servo amplifier may be adjusted or programmed with respect to one another. It is particularly useful in the regulation of flow control valves in water distribution and sewage disposal systems, but its application to steam boilers is also disclosed and described.

Abstract: In order to more effectively control the operation of surge valves in pumping stations through relatively long pipelines where liquid is pumped to an elevated discharge circuit and avoid excessive waste of water, where there is provided an electric solenoid to effect opening and subsequent closing of the surge valve and an electric circuit that responds to abnormal conditions which will result in a pressure surge of water with the unscheduled pump stoppage due to mechanical or electrical failure. This circuit operates to open the solenoid valve in time for the surge valve to open before the actual pressure surge of water arrives and closes after the surge has spent at least most of its force, so that liquid will be spilled for only a safe period of time. At the same time, the circuit will effect the successive display of pilot lights to indicate its condition at any time.

Abstract: For use in connection with an electrically driven pump and check valve combination as used in municipal water and sewage plants wherein the check valve prevents the reverse flow of water from the pipeline to which the pump supplies water into the pump, as would otherwise happen in case of a pump failure or breakdown or temporary power failure, there is provided a pump director with a first timer that starts the pump operating as soon as a control switch is closed and power is available and, as soon as the pump motor is energized, a blue signal light flashes, but if pressure does not begin to build up in the pump outlet with the check valve closed, a flashing red signal will replace the blue and continue indefinitely until manually reset.

Abstract: In order to more effectively control the operation of surge valves in pumping stations through relatively long pipelines where liquid is pumped to an elevated discharge circuit and avoid excessive waste of water, where there is provided an electric solenoid to effect opening and subsequent closing of the surge valve and an electric circuit that responds to abnormal conditions which will result in a pressure surge of water with the unscheduled pump stoppage due to mechanical or electrical failure. This circuit operates to open the solenoid valve in time for the surge valve to open before the actual pressure surge of water arrives and closes after the surge has spent at least most of its force, so that liquid will be spilled for only a safe period of time. At the same time, the circuit will effect the successive display of pilot lights to indicate its condition at any time.