Project Neptune
August 2008
Valves, Actuators & Pump Control
Spirax Sarco South Africa has completed the second batch of three 250 mm globe control valves for delivery to Norway.
The valves are designed for shipboard application where they are used to control the flow of steam at an inlet pressure of 25 bar and a temperature of 230°C. The outlet pressure can be as low as 4 bar and the maximum flow rate is 79 100 kg/hr.
The locally produced valves stand 1,7m tall and weigh over a ton
In order to cope with such a large pressure drop, the valves are fitted with specialised trim sets incorporating multilabyrinth energy dissipating stacks, which give bilinear system characteristics. The plugs and seats are hardened with Stellite 6 that is applied using a plasma arc process. This enables the valves to dissipate approximately 8250 kW of energy, by contrast a standard globe control valve would only be capable of dissipating around 1490 kW.
To achieve high reliability the valves are not fitted with pressure balanced trim, but rather relatively large actuators are used to guarantee a good shut-off which does not deteriorate as rapidly as if pressure balance seals were incorporated in the design.
The valves are therefore fitted with long stroke tandem piston actuators with integrated tank air fail systems. This allows a relatively compact design that achieves shut-off better than 0,01% of rated capacity, under test conditions. Prior to installation on the oil-tankers the valves were certified by Det Norske Veritas, the largest globe control valves manufactured in South Africa to be so certified.
Spirax Sarco says these valves typify the company’s commitment to design and build specialised valves that meet demanding client requirements and maximise productivity.
For more information contact Debbie Groenewald, Spirax Sarco, +27 (0)11 230 1300, [email protected], www.spiraxsarco.com
Further reading:
Submersible pump protection
ifm - South Africa
Valves, Actuators & Pump Control
With ifm’s remote monitoring solution you can visualise the condition of your submersible pumps and diagnose issues before they become serious problems.
Read more...
Electrically operated, energy-efficient double diaphragm pumps
Valves, Actuators & Pump Control
BMG has introduced the EVO 210 series electric double diaphragm pump range, offering a quieter, more energy-efficient alternative to conventional air-operated diaphragm pumps for chemical processing, mining, wastewater treatment and general manufacturing applications.
Read more...
Internationally engineered valves support uptime in tough conditions
Bearing Man Group t/a BMG
Valves, Actuators & Pump Control
BMG’s Fluid Technology division works closely with industry in sub-Saharan Africa to ensure that all valves, strainers and flow control equipment supplied meet the exact requirements of every application and also conform with stringent industry standards.
Read more...
Engineering simplicity: shaping the future of valve automation
Festo South Africa
Editor's Choice Valves, Actuators & Pump Control
Festo’s VTOP pneumatic assembly offers a streamlined approach to managing pneumatic and electrical interfaces at the valve assembly.
Read more...
Hygienic processing with butterfly valves and Bürkert control technology
Bürkert South Africa
Valves, Actuators & Pump Control
Among the standout technologies shaping modern hygienic processing environments are hygienic butterfly valves, especially when seamlessly integrated with Bürkert actuators, control tops and positioners.
Read more...
Cryogenic valve limits leakage and energy loss
Valves, Actuators & Pump Control
Emerson has introduced the Fisher IC2 cryogenic top-entry control valve, ideal for cold box applications in air separation units, hydrogen liquefaction and LNG production.
Read more...
Allmech introduces new water treatment solutions
Valves, Actuators & Pump Control
Allmech has announced a series of product updates aimed at improving reliability, efficiency and system simplicity in high-volume and high-hardness water environments.
Read more...
Duplex valve improves continuous production at Gauteng manufacturing facility
Valves, Actuators & Pump Control
In a recent installation at a Gauteng-based manufacturer of household and personal care products, Allmech provided a tailored water treatment solution to ensure a consistent supply of soft water for steam generation, an essential element in the client’s 24/7 production cycle.
Read more...
Developing solutions for SA’s wastewater challenges
Valves, Actuators & Pump Control
KSB Pumps has a proud global legacy in the development of self-priming pump technology, which reflects decades of engineering innovation and application expertise. Building on this foundation, KSB’s AU series has extended the company’s self-priming expertise into screened wastewater handling, which meets the growing needs of municipal and industrial sectors worldwide.
Read more...
Helping to solve wastewater challenges
Valves, Actuators & Pump Control
KSB Pumps and Valves is doubling its efforts to help government and municipalities find practical and technical solutions to the growing wastewater challenges gripping large parts of the country.
Read more...
printer friendly version