Electricity + Control February 2017

VALVES + ACTUATORS

ROUND UP

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 ivona.jovic@gemue.de

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. Tel: +27 (0) 11 971 9400 or email malan/bosman@tectra.co.za

February ‘17 Electricity+Control

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