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Have faith
November 1st 2005

Dutch process-interlocking and valve control specialist Netherlocks has developed a method of testing emergency shutdown and highintegrity pressure-protection system valves during normal operation of a plant, avoiding the loss in productivity caused by conventional testing methods.

The Fail Action Integrity Test Handling (FAITH) system limits the stroke of the valve-actuator combination to just 20°, enough to guarantee the reliability of the valve without impacting on production.

The conventional way of testing these valves involves closing them completely. Since shutdowns are rare, plants tend to install an expensive, over-sized actuator to 'crack' the sticking valve. The FAITH system removes the need for such an actuator and enables tests to be performed more frequently and conveniently.

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