Extracting the vacuum
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.AL1SA Vacuum Extraction has produced a range of powerful vacuum extraction units which are offered for sale or lease hire.
Both static and vehicle mounted units are available claimed to be capable of handling wet waste or, at the flick of a switch, dry material up to the size of a half brick.
Edbro (Scotland) Ltd helped in the construction of the body also employing Edbro hydraulic equipment and tipping gear.
The standard vehicle mounted unit consists of two sections — the forward unit houses the suction equipment while the rear unit fitted with underfloor tipping gear contains the collected material.
The first unit to be mounted on a vehicle is fitted to a 24.4 tonne (24-ton) gross Leyland Reiver six-wheeler and power for the vacuum pump is provided by a 134kW (180bhp) Perkins V8 diesel engine.
Gas and electric motors are being offered as alternatives and for smaller vehicle installations power can be taken from the vehicle's gearbox via a pto.
Air discharged from the va cuum pump first passes through a filter system which is claimed to retain all contamination from the atmosphere.
The 13.8cum (18cuyd) D400 prototype multi-purpose model is said to have a loading capacity of 40.6 tonnes (40 tons) per hour and a legal capacity of 10.2 tonnes (10 tons).