Home > Rotork valve actuation selected for Australia’s giant coal seam gas to LNG projects

Rotork valve actuation selected for Australia’s giant coal seam gas to LNG projects

Supplier News
article image On the left, CVA actuator model CVQ1200; behind, Skilmatic model SI-Q51 electro-hydraulic actuator; and right, Skilmatic model SI-Q60

Various flow control products from Rotork will be used throughout the giant Queensland coal seam gas-to-LNG projects in Australia. 

To date, Rotork’s international sales network has received orders for more than 5000 valve actuators, embracing electric, electro-hydraulic, pneumatic and gas-over-oil technologies.

The three projects – Queensland Curtis LNG, Santos GLNG and Australia Pacific LNG - are developing coal seam gas in Queensland’s Surat and Bowen Basins. Hundreds of kilometres of pipelines will link the natural gas production wells on the Queensland mainland with a world-class LNG production plant under construction on Curtis Island, which will initially produce more than 27 million tonnes of LNG for export each year. These coal seam gas projects are centred on a clean and efficient energy source with half the carbon dioxide emissions of coal. 

HART-enabled Rotork CVA modulating electric actuators have been ordered for process valve control at an eventual total of 2000 widely distributed sites in upstream mainland wellheads. In addition to natural gas, CVA actuators will also control the flow on the extraction process for coal seam water, which will be treated for use by agricultural and industrial customers as well as to supplement domestic water supplies.

CVA actuators deliver continuous, repeatable modulating control with a programmable fail to position option. Resolution, repeatability and hysteresis performance is quoted at less than 0.1% of full scale, offering suitability for some of the most demanding control valve applications. Innovative CVA electric actuation removes the expense of installing and maintaining instrument air supplies at these remote sites, where the pressure of the gas itself is too low to provide a viable source for actuator operation. CVAs are also preferred because electric actuation eliminates the release of any environmentally harmful gas into the atmosphere during valve operations.

Nearly 1000 Rotork Skilmatic SI and EH range electro-hydraulic actuators have been ordered for control valves, shutdown valves, wellhead skids and metering skids. These self-contained actuators combine the simplicity and convenience of electrical operation with the modulating precision of hydraulic actuation and the reliability of mechanical failsafe motion. Designed to SIL3 standards for use in safety critical applications, Skilmatic actuators are also programmable for partial stroke testing, enabling valves to be tested without interrupting routine processes.

Rotork electric actuators ordered for the projects also include IQ actuators for use in various isolating valve automation duties. All the Rotork electric actuator ranges feature advanced and user-friendly non-intrusive programming and commissioning technologies, combined with integral data logging, diagnostics and asset management capabilities.

Also forming part of the order for use in the pipeline and LNG plants on Curtis Island are fluid power actuators, most of which are CP and GP range pneumatic actuators operating butterfly valves on LNG production lines. The actuators are customised with control packages to meet specific operating duties, including SIL2 and SIL3 applications.

The GO range gas-over-oil actuators will be used for the large mainline pipeline shutdown valves. GO actuators are designed to use the pressure of the pipeline gas as the motive power source. 

Rotork’s international sales network has made an important contribution to this success, with orders received at Rotork offices in Australia, China, Singapore, Italy and the USA. 

Rotork Australia has moved to larger premises in order to fully support the Queensland projects.

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