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production & processing
Mechanical scoop belt-sampler
United Marine Aggregates > Greenwich Wharf, London > 0208 305 0978
United Marine Aggregates at Greenwich Wharf carries out
daily routine testing of aggregates being loaded into rail
wagons. To facilitate regular joint sampling with rail-fed
customers, remotely behind safety guarding, a robust pivoted
sampling scoop was designed and installed.
Samples can now be taken from the moving conveyors, by
lowering the scoop (pivoted centrally) into the stream of
moving material, then pivoting the device, thus sliding the
sample down the short integral chute into a sampling bag on
the ground, thereby minimising manual handling. The ease of
use of the finished device has increased customer confidence
in the conformance of the end product.
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Preventing burner fuel fires
Tarmac Central > Mancetter Quarry, Warwickshire > 01827 712324
Kevin Alsop, Coating Plant Foreman at Mancetter Quarry has engineered a system to substantially reduce
the risk of coating plant fires due to fuel leaks or incomplete combustion.
Based around two (25mm bore) pressurised ball valves – one for the gas oil supply, the other for the
‘reprocessed’ oil supply – these valves (and pipes) are encased in red nylon tubing. 60psi pressure acts
against a spring to keep the valve open to supply fuel to the burner.
If there is a fire, the nylon tubing heats up and bursts, reducing the pressure to atmospheric level which
automatically closes the fuel valves. There are also separate fuel valve leak detectors which can sense the
presence of unburnt fuel on the non-pressure side of the valve. Upon detection, an alarm is raised, thus
preventing the build-up of unburnt fuel in the dryer or bag filter unit.