Chinese Pipeline Selects Rotork ELB for Increased Line Break SafetySource: www.gulfoilandgas.com 5/17/2018, Location: Asia
The Rotork Electronic Line Break (ELB) is a robust, self-contained system that combines pipeline pressure monitoring with intelligent valve control. It continuously monitors upstream and downstream pipeline pressure dynamics to provide early detection of pipeline breaks and initiate automatic valve actuator movement to a pre-selected emergency position.
In one recent contract Rotork GO (Gas-over-Oil) pipeline actuators have been fitted with ELB units for line break monitoring and protection on remotely installed valves on a natural gas pipeline in China. The ELBs will enable the operator to monitor the running condition of the gas pipeline and the open/closed status of the valves. The immediate reporting of a line break by an ELB will enable the operator to swiftly close the appropriate valves and isolate the problem.
The ELB is housed in a compact, environmentally sealed and explosionproof housing that can be mounted on the actuator or remotely. Valve actuator control - selectable as fail close, fail open or stay put - is based on Rate-of-Drop (RoD) and Rate-of-Rise (RoR) of the pipeline pressure as well as high and low pressure limits. A remote Process Shut Down (PSD) input with the option to override all functions is also available to drive the valve to the pre-determined fail position.
The ELB also provides an array of programmable alarm and alert indications and has an extensive range of features that can be configured to meet end users’ specific requirements. These include up to six remote inputs and four configurable solenoid outputs, Partial Stroke Testing (PST) and Modbus® network connectivity.
Setting menus displayed on the large HMI window are the focus for non-intrusive programming and commissioning using Rotork IQ intelligent electric actuation technology. In normal mode the LCD display indicates valve position. The same window also displays visual indication of status, alarms, event, trend and operation logs and diagnostic data.
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