The Model BSD (belt speed detector) is a “traction action” motion control that indicates when a conveyor belt has slowed or quit moving altogether. The unit can be adjusted as an overspeed, underspeed, or zero speed control. The output of the Model BSD can be wired into a PLC or DCS, or to the optional RMS controller, which has a DP/DT relay to control up to two separate circuits, one for machinery shutdown and one for an alarm.
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Silo maintenance method averts confined space entry
A central Illinois ready mixed concrete producer has resolved material build-up issues in three storage silos where accumulation had slowed production and increased internal pressures, eventually damaging the vessel walls and forcing a shutdown. By enlisting the Martin Engineering silo-cleaning crew, the Commercial Acres RMC facility, whic is owned by Stark Excavating, was able to have the vessels safely emptied and ready for repair in 10 working hours—without confined space entry.
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