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Partial stroke testing (or PST) is a techn … Partial stroke testing (or PST) is a technique used in a control system to allow the user to test a percentage of the possible failure modes of a shut down valve without the need to physically close the valve. PST is used to assist in determining that the safety function will operate on demand. PST is most often used on high integrity emergency shutdown valves (ESDVs) in applications where closing the valve will have a high cost burden yet proving the integrity of the valve is essential to maintaining a safe facility. In addition to ESDVs PST is also used on high integrity pressure protection systems or HIPPS. Partial stroke testing is not a replacement for the need to fully stroke valves as proof testing is still a mandatory requirement. testing is still a mandatory requirement.
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, http://www.isa.org/ +
, http://www.netherlocks.com/partial-stroke-testing/netherlocks-develops-remote-operation-for-faith-pst-system/ +
, http://www.iec.ch/ +
, http://www.ascendant-technologies.com/ +
, https://web.archive.org/web/20121229082755/http:/www.paladonsystems.com/index.php/products/pst-controller +
, http://www.dynatorque.com/dstop/ +
, http://www.imi-precision.com/ico4-pst +
, http://www.foxboro-eckardt.com/en-gb/products/control-valve-positioners/srd991/ +
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Partial stroke testing (or PST) is a techn … Partial stroke testing (or PST) is a technique used in a control system to allow the user to test a percentage of the possible failure modes of a shut down valve without the need to physically close the valve. PST is used to assist in determining that the safety function will operate on demand. PST is most often used on high integrity emergency shutdown valves (ESDVs) in applications where closing the valve will have a high cost burden yet proving the integrity of the valve is essential to maintaining a safe facility. In addition to ESDVs PST is also used on high integrity pressure protection systems or HIPPS. Partial stroke testing is not a replacement for the need to fully stroke valves as proof testing is still a mandatory requirement. testing is still a mandatory requirement.
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Partial stroke testing
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