Rotork Valve Actuation Robust & Accurate
Robust and accurate Rotork valve actuation at the centre of advanced oil tanker VOC emission control system
VOCON venting control valve with Rotork CMA actuator installed on the deck of an oil tanker.
The controlled release is often undertaken when the gas pressure approaches a pre-set point. However, it is not always clear at what pressure a manually controlled release should be stopped. Without this information, excess vapours can be released, causing air pollution and a loss of cargo.
To meet this challenge the VOCON Valve and Reporting System controls the vapour pressure in oil cargo tanks to minimise and fully control VOC emissions. Designed to comply with the latest international rules and regulations it is equipped with the most advanced reporting system available.
At the centre of the system, a venting control valve operated by a Rotork CMA electric process valve actuator is installed on the bypass line between the IG (Inert Gas) main pipeline and the mast riser.
In automatic mode the actuator modulates the valve position in response to a control signal from a pressure transmitter to control the vapour pressure in all the cargo tanks. This critical duty reduces VOC loss by maintaining a constant pressure in the cargo tanks during the voyage.
The compact and robust CMA actuator selected for this duty is environmentally sealed to IP67 and internationally certified for use in Zone 1 hazardous areas. The wide ambient operating temperature range of -20 to +65ºC facilitates long-term reliability and maintenance-free operation in the exposed environments experienced on the decks of oil tankers.
Accepting an industry-standard 4-20mA control signal, resolution is 0.2%, delivering the accurate, repeatable and backlash-free positional control demanded by the VOCON application.
Tel: +44(0)1225 733 200
Email: information@rotork.com
Web: www.rotork.com
Published: 2nd May 2018
Rachel Wormald, Managing Director at YPS Valves Ltd and Elizabeth Waterman, ...
Are you looking for industry-leading, brand independent valve and actuator ...
As can be seen from the photograph, clearly the resident birds at Bartlett ...
Howco Group has unveiled its latest £1million investment, with the ...
In 2024, Allvalves is poised for an exciting year of growth and expansion, ...
GMM Pfaudler Engineered Plastics & Gaskets are delighted to bring the ...
In the ever-evolving valve industry, GMM Pfaudler stands out for its ...
SAMSON Controls Ltd – part of the SAMSON group - a renowned leader in ...