Rotork modulating electric valve actuators have been installed in an efficiency upgrade project at a large water treatment works serving the Dutch capital city of Amsterdam.

The modern and highly automated plant at Vogelenzang, owned by Waternet, has a daily water treatment capacity of 180,000 cubic metres. The treatment regime comprises pre-screening, carbon filtration, ozone injection and sand filtration. Waternet is the only water company in the Netherlands to cover the entire water cycle, from the treatment of waste water and provision of drinking water to cleaning and maintaining levels of surface water. These services are performed on behalf of the Regional Public Water Authority – Amstel, Gooi and Vecht – and the City of Amsterdam.

Reliability problems had arisen with the electric actuators on the carbon filtration plant, which were failing to cope with the modulating valve duties required for efficient filtering and backwashing operations. Rotork’s solution has been to remove the old actuators, install IQTMPro quarter-turn modulating actuators directly onto the affected butterfly valves and connect to the existing power and control cabling. This work has been performed by Rotork Site Services, Rotork’s specialist division for retrofitting, site maintenance and repair activities...(+)

Cameron reported net income of $99.9 million, or $0.40 per diluted share, for the quarter ended December 31, 2011, compared with net income in the prior year’s fourth quarter of $164.6 million, or $0.66 per diluted share.
Cameron fourth quarter earnings $0.77 per share, excluding charges

- Quarter’s earnings per share total $0.40, including charges
- Quarter’s orders total $1.9 billion, year-end backlog nearly $6 billion
- 2011 orders total $7.8 billion, $2.0 billion more than 2010

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The National Gas Company of Trinidad and Tobago Limited is using the largest Dantorque™ actuator ever produced by Emerson to help expand its gas distribution network on the Caribbean nation of Trinidad and Tobago. The actuator, which is 2.4 meters tall and 1.64 meters in diameter, will be used to isolate the gas being supplied from Trinidad’s northern offshore gas fields in the event of an emergency situation.
The multi-million dollar project covers a range of valve automation products from Emerson, including a Dantorque subsea gear operator and one smaller spring return actuator, three Shafer™ subsea actuators and 11 Shafer gas-over-oil actuators installed on the offshore-platform and land portions of the pipeline.

The development of new gas fields off the northeast shores of Trinidad required new pipelines to be connected to the existing pipeline infrastructure, which is all in the south. The tie-in to the large 91 cm diameter existing pipeline required a spring return actuator with ROV (Remote Operated Vehicle) override capability. To meet this requirement, Emerson supplied a DTUS 171/1350 Dantorque actuator which has a spring ending torque of 102,500 Nm (907,800 in-lbs) and weighs nine metric tons (9.92 short tons)...(+)