Chemical Technology Oct 2015

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Chemical Technology • October 2015
FOCUS ON PUMPS & VALVES
New component seal range is configurable-by-design
AESSEAL has launched a completely re-
engineered modular component seal range
that aims to raise the industry standard and
allow configurable component seals to be
built to order.
With 10 000 product lines available from
stock and over 44 000 product permuta-
tions configurable, it offers customers the
greatest possible product availability, quality
assurance and service.
The new range, in development for
almost four years, incorporates unique pat-
ented features which help to improve pump
reliability. These features include improved
seal face cooling through directed fluid
barrier flow systems, hydraulically balanced
seal face technology, and plug-in designs to
improve performance and reliability.
Incorporating a build-to-order philosophy,
the new range offers a larger selection
of product variants and standard product
lines that can easily be adapted to suit the
customer’s requirements.
By manufacturing the majority of the
parts, and having full control of the supply
chain, AESSEAL can now offer a much wider
portfolio of seals.
The new product range is further sup-
ported by the AESSEAL seal-selection app,
enabling an equivalent AESSEAL component
seal to easily be selected knowing just the
pump type, competitor seal reference, or
dimensional information.
Formore information contact RobWaites (man-
aging director) on tel +27 11 466 6500 or
email
AESSEAL’s new modular component seal range
New generation of liquid ring vacuum pumps
The new series of TRVX Pompetravaini single stage, variported, liquid ring
vacuum pumps introduced a new design in performance and reliability con-
cepts. This is the result both of Pompetravaini’s 80 years of experience and
of the views and suggestions of its end users; in other words, a milestone in
the way Liquid Ring Vacuum Pumps (LRVPs) are designed and manufactured
to provide the end users with tangible benefits.
This new hydraulic profile allows for a performance increase of over 10 %
over traditional LRVP designs. These increases apply to efficiency and to
operational cost savings achieved over the entire pump life.
There are numerous advantages to LRVPs, of which the following are just
some:
• The pump weight is on average 30 % less than traditional designs.
• Compact dimensions and volume of 40 % less than traditional designs.
• Single and direct service liquid connections.
• Up to 50 % service liquid usage reduction.
• Central body impeller housing with integrated suction and discharge mani-
folds, a featurewhich reduces pump components and increases robustness.
• Suction, discharge port plates and impeller in stainless steel allowing
greater reliability.
• Standard ISO 3069/DIN 24960 mechanical seals fitted, easily obtainable,
reducing component stocking.
• Mechanical seals can be replaced without disassembly of the pump reduc-
ing downtime.
• External precision regulation of the impeller shaft. Easy maintenance and
performance optimisation assembly time and cost.
• The length between bearing supports is 25% less than traditional pump de-
signs with consequent reduction of eventual vibration and shaft deflection.
• Connections are universally flanged to meet both DIN-EN and ANSI stan-
dards.
The TRVX is “a true leader in its own class” with capacities from 690 m³/h
up to 2 000 m³/h with a maximum vacuum of 33 mbar abs. With this range
it covers many of the industrial applications out in the market.
For more information or a quotation,contact Air & Vacuum Technologies which is
the official and sole agent for the full Pompetravaini LRVP range in southern
Africa. Tel: 0861 VACTEC (822 832),
SIL assessment of GEMÜ products
Together with the independent testing organization
EXIDA, GEMÜ has assessed a selection of different
products in accordance with SIL.
This assessment according to SIL covers the func-
tional safety of the products and is used to evaluate the
systems in relation to the reliability of fail safe functions.
The result is safety-relevant design principles which
must be complied with in order to minimize the risk of
a malfunction.
SIL itself is ameasure of the probability that a system
will correctly fulfil the required fail safe functions for a
specific time period.
In addition to pilot valves, the GEMÜ products as-
sessed include globe and diaphragm valves and electri-
cal position indicators.
By assessing the product selection referred to here,
GEMÜ is complying with its customers’ requirements pri-
marily from the process and manufacturing industries.
With the data made available, these can now carry out
assessments of entire plants.
GEMÜ is one of the world’s leading manufacturers
of valves, measurement and control systems. Over the
course of more than 50 years, this globally focused,
independent family owned enterprise has established
itself in important industrial sectors thanks to its inno-
vative products and customised solutions for process
media control.
A broad based modular system and adapted auto-
mation components mean that individualised standard
products and customised solutions can be combined
to make over 400 000 product versions.
For more information contact Ivona Jovic on
tel: +49 (0) 7940 123 708,
email: or go to
.