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WNIP Jan Feb 19.1 Digital low res

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12<br />

<strong>19.1</strong><br />

New high p<strong>res</strong>sure slurry valves<br />

Stafsjö continues to focus<br />

on engineering and<br />

manufacturing of high p<strong>res</strong>sure<br />

valves and introduces the SLH<br />

and SLX for really demanding<br />

applications with slurry and<br />

other abrasive media. Since the<br />

introduction of Stafsjö’s first<br />

slurry valve, the SLV, in 2009 they<br />

have come across applications<br />

requiring extreme performance<br />

requirements at really high<br />

p<strong>res</strong>su<strong>res</strong>. And to win some big<br />

slurry projects they realized that<br />

they needed to have high p<strong>res</strong>sure<br />

slurry valves in their product<br />

range. Stafsjö’s SLH is able to cope<br />

with p<strong>res</strong>su<strong>res</strong> up to 20 bar, while<br />

the SLX can cope with p<strong>res</strong>su<strong>res</strong><br />

as high as 50 bar. Just like Stafsjö’s<br />

other slurry valves, the SLH and<br />

the SLX are designed to give<br />

a tight shut-off, independent<br />

of p<strong>res</strong>sure direction. The f<strong>low</strong><br />

capacity is maximized with a full<br />

bore and minimal seat cavity,<br />

and at the same time st<strong>res</strong>ses<br />

and wear on the equipment are<br />

minimized, <strong>res</strong>ulting in long<br />

service life of the valve and<br />

related process equipment.<br />

Product featu<strong>res</strong> The SLH and<br />

SLX have epoxy coated fully<br />

lugged valve bodies in nodular<br />

iron with integrated purge ports.<br />

The reinforced seats are flexible<br />

in an axial way and seals towards<br />

each other in the bore when the<br />

valve is in the open position, thus<br />

protecting internal parts and<br />

the gate from the abrasive high<br />

p<strong>res</strong>sure media. Upon closure,<br />

the seats are displaced axially,<br />

forming a seal with the gate until<br />

it forms a complete closure of the<br />

bore and gives a bi-directional<br />

tight shut-off. The seats also form<br />

a sealing face on the valve flanges<br />

saving the need for gaskets. The<br />

gate is supplied in high strength<br />

stainless steel, coated to give a<br />

hard and high wear and corrosion<br />

<strong>res</strong>istance surface. For security<br />

reason the valves are always<br />

supplied ready to be locked in<br />

either opened or closed position.<br />

The gland box, with three layers<br />

of TwinPackTM and a box bottom<br />

scraper, gives the gate guidance<br />

during operation and makes<br />

sure that a first-rate sealing is<br />

p<strong>res</strong>erved. Both SLH and SLX have<br />

solid top works to give excellent<br />

stability during operation.<br />

In the standard collection of<br />

actuators and accessories there<br />

are several types to choose<br />

from and regardless of what<br />

was originally supplied with the<br />

valve, any exchange of actuator<br />

and/or accessories can easily be<br />

performed on site.<br />

fred.venter@valve.co.za<br />

Streamlining<br />

specification<br />

processing<br />

to reduce<br />

project risk<br />

Project Data Link is a project<br />

engineering environment<br />

that helps reduce complexity and<br />

accommodate changes in capital<br />

projects. As projects become<br />

more complex with multiple<br />

contractors and stakeholders,<br />

Project Data Link helps keep<br />

projects off the critical path<br />

by efficiently and consistently<br />

translating project information,<br />

including tag databases and<br />

instrument indices, from<br />

multiple sources into project<br />

deliverables. It mitigates project<br />

risk by normalizing specifications<br />

into a single data source with<br />

traceability and an integrated<br />

change-management system.<br />

Project Data Link gives<br />

multiple suppliers, engineering<br />

firms, and other stakeholders<br />

access to project information<br />

including specifications related to<br />

field devices and the distributed<br />

control system (including control<br />

logic and configuration). In<br />

addition, data provided in various<br />

formats are normalized so that all<br />

information is available in a single,<br />

consolidated standard view.<br />

The integrity of project<br />

information is especially<br />

important during late project<br />

changes. The data link is always<br />

up to date, so when a change<br />

is initiated Project Data Link<br />

automatically reconciles it against<br />

what is in the system, identifies<br />

what needs to be changed,<br />

automatically sends updates to<br />

the DeltaV distributed control<br />

system and provides an audit<br />

trail of what has changed. This<br />

saves time and eliminates errors<br />

during the critical late stages of<br />

the project.<br />

michael.eksteen@<br />

emerson.com<br />

Introduction to visualization with Visu+ Exp<strong>res</strong>s and HMI<br />

The document “First steps<br />

with Visu+ Exp<strong>res</strong>s and HMI”<br />

offers new users an insight into<br />

the Visu+ visualization software<br />

and shows you how the HMI,<br />

controller, and development<br />

environment interact with one<br />

another in principle.<br />

Users are guided every step of<br />

the way until completion of the<br />

visualization project. This involves<br />

creating a new project in Visu+,<br />

designing a user interface via<br />

the import of variables from the<br />

controller via OPC, and linking<br />

with Visu+ application objects.<br />

The guide finally shows the user<br />

how to transfer the finished<br />

project to the HMI and how to<br />

operate the Visu+ application<br />

from there.<br />

No prior knowledge is<br />

needed to use the document. The<br />

introduction is structured such<br />

that quickly visible <strong>res</strong>ults are<br />

achieved and the user can create<br />

an image from the interaction<br />

of the products. The document<br />

and the project files can be<br />

downloaded free of charge from<br />

the download area of each Visu+<br />

HMI.<br />

patrickr@phoenixcontact.co.za

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