Electricity + Control March 2015

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ROUND UP HAZARDOUS AREAS + SAFETY
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
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