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	The Purpose The INTERCEPTOR®-VETM is designed to prevent explosion propagation from one vessel to another through interconnected piping. It can also be used to prevent hot particles, glowing embers, or flames from reaching a vessel and igniting a deflagration or a fire. The Problem In process systems there are situations where a deflagration can propagate from the initiating site to connected machinery through interconnected piping. In some applications it may be feasible and desirable to detect, isolate, and quench prior to ignition. In both situations, a fast response explosion isolation valve offers the best means to accomplish these objectives. Principle of Operation. The INTERCEPTOR®-VETM Valve is normally open. Upon receiving a signal from either a pressure responder or an optical sensor the INTERCEPTOR®-VETM Controller will respond by sending a signal to the INTERCEPTOR®-VETM Valve. The INTERCEPTOR®-VETM Valve will close in milliseconds to prevent passage of hot particles, glowing embers, flames, or pressure from continuing to flow through the pipe. The medium for actuation is plant compressed-air stored in a tank at the valve to ensure the fastest response possible under any plant conditions. The valve closure principle is a rubber bladder pinch valve and is a fail safe design. The INTERCEPTOR®-VETM requires little vendor support. The pinch bladder has little mass and, therefore, does not impart shock to the valve, the seats, or the piping upon closure. To illustrate this advantage, it can, and in fact should be routinely tested. There is a test button for this purpose and a re-set button. This is a monthly check performed by qualified plant personnel. The test function is PIN Code protected to prevent unauthorized tampering. The INTERCEPTOR®-VETM Valve has a wear indicator in the bladder. If the bladder is exposed to abnormal wear, the Liner Wear Alert will activate a message on the INTERCEPTOR®-VETM Controller. The bladder is replaceable with the valve body opening in a clamshell fashion. The INTERCEPTOR®-VETM Controller is ultra fast and ensures the quickest response possible at the current state of the art. Fast response allows the shortest possible distance between a protected vessel and the INTERCEPTOR®-VETM Valve.
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