Abstract: A variable function voting solenoid-operated valve apparatus is provide, wherein the apparatus includes a first solenoid-operated valve, a second solenoid-operated valve and a bypass valve disposed in mutual fluid communication, wherein one or more of said first solenoid-operated valve, said second solenoid-operated valve and said bypass valve further comprises one or more air-to-move valve actuators; an air supply for delivering a supply of compressed air to said one or more air-to-move valve actuators; a plurality of pressure sensors, including a first pressure sensor disposed in fluid communication with said first solenoid-operated valve, a second pressure sensor in fluid communication with said second solenoid-operated valve, and a third pressure sensor disposed in fluid communication with said bypass valve; and an exhaust vent for venting pressure accumulated within one or more of said first solenoid-operated valve, said second solenoid-operated valve and said bypass valve to an external environment.

Abstract: Disclosed herein is an apparatus for on-line detection of leaky valve seals wherein the apparatus includes an isolation valve having at least one upstream seal, at least one downstream seal, a fluid flow diverter; an inner cavity isolated from a fluid flow path by the seals; a vent port disposed in fluid communication with the inner cavity; a vent valve disposed in fluid communication with the vent port; and a differential pressure sensor disposed in fluid communication with both the vent port and the fluid flow path.

Abstract: A high-diagnostic, dual sensor process temperature switch having a one-out-of-two voting architecture useful in commercial and industrial fluid transport systems is provided for determining whether process connections and isolation valves are plugged or closed, and for determining whether individual temperature sensors within the device are deformed, corroded or otherwise compromised. The dual temperature sensors functionally employ similar electronic technology, and are each disposed to provide variable electrical outputs to one of a plurality of discrete A/D converters. The dual temperature sensors' electrical outputs are compared prior to the A/D conversion process in order to immediately identify large temperature deviations between the respective sensors. Each of the A/D converters' digital signals are routed to one of a plurality of independent CPUs or data processors; the CPUs then generate digital output signals representing either a logical 0 (Low) or 1 (High).

Abstract: An apparatus and method for simply and economically detecting leaks in a isolation valve disposed in an on-line fluid transport system having at least an upstream pipe and a downstream pipe is provided, the apparatus comprising a isolation valve connected between the upstream pipe and downstream pipe for isolating fluid flow through the transport system; wherein the isolation valve includes at least one upstream seal, one downstream seal, and an inner cavity effectively isolated from the fluid flow by the seals.