Product category:
Shutdown, SIS and safety systems
News Release from: Drallim Industries | Subject: Smart Valve Monitoring system
Edited by the Processingtalk Editorial
Team on 15 June 2004
Real time partial stroke testing of ESD
valves
The Drallim Industries Smart Valve Monitoring system is a partial stroke testing system that tests all of the components of a shut down system in real time
As technology has moved on techniques for partial stroke testing have become more comprehensive which have lead to high component coverage However a major drawback of techniques to date is that shut down systems are not tested in the same manner as they are designed to operate therefore potential failure modes may be masked
This article was originally published on Processingtalk on 18 Nov 2003 at 8.00am (UK)
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Capturing the hydraulic footprint of an SSIV
A worlds first: Drallim Industries announces that its Smart Valve Monitoring system has captured the hydraulic footprint of an SSIV in operation 200m off the platform and at 150 metres depth
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Valve signatures and partial stroking can be achieved with the simple addition of a pressure transmitter and purpose designed microcomputer can diagnose many types of valve problem
The Drallim Industries Smart Valve Monitoring system is a partial stroke testing system that tests all of the components of a shut down system in real time.
This allows the user not only to assess whether the valve would close but also the performance of all components contained within the system.
This is achieved by conducting the test in exactly the same manner as that required for a shut down and monitoring the instrument pressure during the test.
Further reading
Drallim Smart Valve Monitoring fully analysed
Drallim Smart Valve Monitoring (SVM) has completed its FMEDA analysis by EXIDA; the resulting analysis shows SVM to have a Safe Failure Fraction (SFF) of 100%.
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Siemens Automation and Drives has launched new software which allows the integration of RFID (radio frequency identification) systems into business processes
This generates a signature that relates to the characteristics of all of the components of the system as they operate in a real time mode.
The main benefit of this technique is that not only can it be seen that the valve will close in the required time but also that the solenoid valve and any associated quick exhaust valves are switching in a consistent manner.
By gathering this data over a number of tests the user can assess the performance of the system and determine whether any of the components are degrading over time.
This allows the user to schedule maintenance in advance of any manifestation of failures.
This technique has proved of great benefit in the first ever partial closure testing of sub sea valves, remotely capturing the hydraulic footprint of a Sub Sea Isolation Valve (SSIV) located 200 metres off the main platform and at 150 metres depth.
IEC 61511 determines that safety related system isolation valves should be capable of being tested in order to establish there operability; a significant problem where safety valves are located in inaccessible locations like the sea bed.
Regular testing and monitoring of the performance of ESD valves and associated control elements can lead to the saving of thousands of dollars from unexpected downtime and a significant improvement in the availability of the safety instrumented system.
Drallim Industries are experts in partial stroking solutions and have installed systems worldwide for pneumatic and hydraulic valves both onshore and offshore.
They have a wide range of systems for installation in safe and hazardous areas from low tech to full smart analysis systems.
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