Electricity + Control February 2017

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Efficient motorised actuator for globe and diaphragm valves
The GEMÜ eSyDrive motorised actuator sets new standards
in the areas of compact design, speed and accuracy. GEMÜ
has designed this actuator as a response to increasing require-
ments in the area of motorised valves, while recognising the
current trend in the area of process automation. Pneumatically
operated valves are increasingly being replaced with electrical
versions.The development of this new actuator has been based
on decades of experience in the area of motorised actuators.
Designed on the basis of the hollow shaft principle in conjunc-
tion with technology that does not use brushes or sensors, the
GEMÜ eSyDrive sets new standards in terms of compact design,
reliability and accuracy. The self-locking actuator also offers a
high level of reproducibility for positioning and is therefore
particularly suitable for use in precise control applications.The
Ethernet-based eSy-web interface, in conjunc-
tion with an integrated web server, enables the
exchange of parametrisation and diagnostics data
and the networking of several devices.
Motorised valves are primarily used in areas
where the use of compressed air is not desired
or possible. Large-scale production plants are
cited as examples of such areas, as distribution
of compressed air is uneconomical in such facili-
ties. Another example of the areas of use of these
valves is mobile or decentralised facilities for
drinking water treatment.
Enquiries: Ivona Jovic.
Email
Innovative desiccant dryer ensures consistent gas purity
In the business of industrial gas production,
consistent product quality is an absolute
requirement. To ensure this consistency
is maintained, raw gas from production
facilities is tapped off their main supply
lines for analysis.
However, this gas is often saturated with
water, which hampers reliable analysis.
Here RTS Africa Engineering, a Tshwane-
based engineering solutions provider to
industry’s toughest challenges, has come
up with an innovative solution in the form
of the RTS Africa desiccant dryer.
"Our desiccant dryer ensures reliable
analysis and, consequently, stable and con-
sistent quality for users of industrial gases,"
points out Ian Fraser, Managing Director of
RTS Africa Engineering. In some applica-
tions, moisture in gases used in industry
can cause serious damage to plant and loss
of production, he points out.
'Wet' gas is piped into the dryer through
its 1/4” NPT stainless-steel needle valve,
which regulates the gas flow. The dryer
consists of a transparent PVC or Perspex
tube fitted with PVC ends. The gas passes
through a water-absorbing bed consisting of
fused-alumina pellets.While the RTSAfrica
desiccant dryer is most commonly used to
dry hydrogen or oxygen, it is suitable for
drying numerous other gases.The dryer can
be installed in plants of varying sizes, as it
will handle a flow rate of between 100ml/
minute and 1 000 ml/minute and a maxi-
mum pressure of 0,5 kPa. In its operating
environment, it will function efficiently in
temperatures of up to 75˚C.
Enquiries:Tel. +27 (0) 11 462 6188
Simple, flexible and efficient standard valve
Tectra Automation, part of the Hytec Group of Companies, has
brought the Aventics ES05 Essential Valve System series to South
African shores.The ES05 series offers a clever, economic and user-
friendly solution for applications with standard requirements in
industrial automation. Designed specifically to reduce the number
of components, assembly is completed with one single tool, mak-
ing life easier for distributors, machine manufacturers and system
integrators with the added benefit of reducing the risk of faults.
The ES05 series was developed by Aventics in response to cus-
tomers’ requests for a simple, flexible and efficient standard valve
with reduced components – tailored to their application.
“The new series, therefore, focuses on ease of handling for dis-
tributors, machine manufacturers and system integrators,” explains
Malan Bosman, Pneumatic Product Manager, Tectra Automa-
tion. “They can configure their customised solution online from a
set number of readily available components. Assembling a valve
system has never been faster or easier.”
The ES05 is a modular system and, as all components are unique
and only one tool is required for the job, incorrect installation is
virtually impossible. All fittings are of the same type and tightened
with the same torque, which further simplifies assembly and pre-
vents errors.
Enquiries: Malan Bosman.
or email malan
ROUND UP VALVES + ACTUATORS
35 February ‘17 Electricity+Control