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