Electricity + Control March 2015

HAZARDOUS AREAS + SAFETY

ROUND UP

Sweep angle control valves – harsh applications Mitech ’s range of SweepAngle Control valves is specifically designed for severe applications with highly erosive process fluids where pressures and/or temperatures are too high for pinch valves or similar slurry valves.The Sweep angle design reduces fluid impingement through the body to offer high resistance to erosion damage. Custom designed to suit various applications, the valves are also ideal for applications where severe flashing is expected.

With a modular design, the valves are offered in sizes from 1”to 16” and if required, larger sizes are available on request.The SweepAngle Control valve has flange ratings of up to 2 500.The plug and seat can be manufactured in hard material, up to and including tungsten carbide or other ceramics. The body can be bronzed or coated with high velocity spray coated tungsten carbide in critical areas. The valve has a flow-to-close configuration and few components in the flow path which eliminate any sharp changes in direction. The seat ring is clamped between the valve body and the downstream pipe work, eliminating the need for a traditional retainer or cage.

Typical applications for the valve include those found in min- ing, petrochemical, food, pulp and paper and power generation industries. Enquiries: Pieter Badenhorst.Tel. 011 927 4850 or email enquiries@mitech.co.za

Flexible relay solution – improved safety Machine builders can easily implement required safety functions while improving productivity with the Allen-Bradley Guardmaster 440C-CR30 safety relay from Rockwell Automation . Users can programme the safety relay through the free Connected ComponentsWorkbench software from Rockwell Automation. This free software reduces programming time and helps increase productivity by allowing users to create, control and monitor a safety system in the same software environment as their standard control. The Guardmaster 440C-CR30 safety relay meets PLe, SIL 3 per EN ISO 13849-1 and IEC 62061 standards. It is ideal for applications requiring four to nine safety circuits and control of up to five zones. “Machine builders across all industries are seeking safety solutions that go beyondmeeting compliance requirements, to helping significantly increase both configuration and operation productivity,” saidThomas Helpenstein, product manager, Rockwell Automation. “The flexible, compact Guardmaster 440C-CR30 safety relay configured via Connected ComponentsWorkbench software meets their needs for improved safety, uptime and productivity. The distinct graphical user interface and drag-and-drop capabilities of the software help guide users through a simple process of selecting certified safety function blocks for the safety relay. Once programmed, an embedded Modbus interface allows the safety relay to easily commu- nicate diagnostic data toAllen-Bradley Micro800 controllers, Allen-Bradley PanelView graphic terminals or

Allen-Bradley CompactLogix controllers. Leveraging the embedded communication capabilities and the software allows users to easily moni- tor, troubleshoot and quickly modify their applications, including performing partial or conditioned shutdowns, as needed. Five status and 16 user-configurable LEDs on the safety relay’s faceplate provide local diagnostics to further aid in status reporting and troubleshooting. Enquiries: Christo Buys. Tel. 011 654 9700 or email cbuys@ra.rockwell.com