Conveying & Transfer Systems

We supply various systems for the transfer and conveying of raw materials from fine powders to polymer bales and everything in between. The most applicable system is specified in accordance with your specific materials and conveying requirements with respect to transfer distance, throughput and downstream process. Our conveying systems generally fall into three main divisions; mechanical, pneumatic and vacuum, each having its own specific sub categories.

Mechanical Conveying & Transfer Systems

Conveyors & Elevators

Belt conveyor systems are used to transfer either loose or solid materials both horizontally and at inclined angles. These conveyors can be supplied with solid or interlinked mesh belts, with or without flights dependent upon requirements and can be used a simple transfer systems, feeding devices or as batch or continuous weighers.

Roller conveyor systems are generally utilised where containerised or solid materials are to be handled. They can be supplied as powered or gravity type and can incorporate bespoke lifting transfer mechanisms, corners and automated holding areas etc.

When pneumatic systems are not feasible and insufficient space is available for an inclined conveyor system material can be elevated using bucket type elevators. Various forms are available dependent upon materials, throughputs etc. In general terms these elevator systems collect material into a bucket or enclosure which is attached to the elevation system (belt, chain etc.). Numerous buckets are located upon the elevation system which lift the material vertically to the required height before discharging it through a connecting chute to the downstream process.

Screw & Vibratory Transfer Systems

Screw conveyors can not only be used as accurate feeding devices but can also provide an efficient method of transferring bulk materials. Such conveying systems can be supplied to simply move product from one storage location to another or to convey product over a longer distances and incorporate directional changes via multiple units.

Transfer screws can be designed and supplied to suit our customer͛s exact requirements with respect to conveying rate, dimensions and material handling capabilities. Rotational sensors & choke switches can be incorporated to monitor screw performance and indicate blockages and faults.

As with screw conveyors, vibratory systems can be utilised to transfer product from one area to another in addition to their use as feeding or dispensing systems. Vibration can be utilised to not only move products horizontally but also along positive inclines either in a linear or rotary fashion.

Pneumatic Conveying Systems (Positive Pressure)

Dense Phase Systems

Dense phase pneumatic conveying systems transfer product as a slug of material at slow speed under high pressure. Dense phase systems normally operate as a batch transfer system where a batch of materials is weighed and discharged into a pressure vessel. The vessel is then pressurised and the discharge valve opened therefore forcing the material along the conveying pipe line. This type of conveying system causes less damage to delicate materials which are susceptible to degradation when transferred at higher speeds. 

Material is transferred to the receiving vessel which is fitted with a reverse jet filtration system which separated the transferring air from the material via a series of filter cartridges. The cartridges are automatically cleaned between batches using reverse air jets.

Lean Phase Systems

Lean phase pneumatic conveying systems transfer product as a stream of material travelling at high speed but under low pressure. This type of transfer system can be utilised for both batch and continuous production and uses a blower unit to force conveying air along a pipe line into which the material is introduced. Material is generally fed from a discharge station or a weigher into the conveying line via a rotary valve which not only delivers material at a constant rate but also separates the upstream equipment from the conveying pressure.

Lean phase conveying system utilise either a filtration unit or a cyclone system at the receiving point to separate material from conveying air.

Vacuum Conveying Systems

Vacuum conveying systems operate in reverse to a lean phase system where material is transferred from source to destination via a vacuum pump or inverse blower. Air is sucked out of the transfer pipe line which causes a vacuum and therefore pulls the material along. This type of transfer system can also be utilised for both batch and continuous production systems.

Vacuum transfer systems generally utilise rotary valves or similar feeding system to control the flow of material into the line and normally incorporate a filter or cyclone unit on the receiving vessel to separate transferring air from material.

Venturi Conveying Systems

Venturi systems use the principles of fluid dynamics to create both negative and positive conveying pressures. A negative pressure is created upstream of the unit and a positive pressure is created downstream. Such systems are therefore very effective in sucking material from its source and supplying it to the destination under pressure. These systems convey materials using lean phase technology and utilise either a cyclone of filter unit at the destination to separate conveying air from conveyed product.

The Venturi system works by creating a constriction within the pipe (classically an hourglass shape) that varies the flow characteristics of the gas travelling through the tube. As the velocity in the throat is increased a consequential loss in pressure occurs. This drop in pressure therefore creates a vacuum effect which can be used to draw material into the conveying pipeline. On the downstream side of the Venturi unit the material is conveyed using the positive pressure air flow.

C J Waterhouse Company is a UK distributor for Kongskilde, a leading supplier of Venturi systems around the world. Their extensive experience within material conveying using fluid dynamic principles has led them to provide a unique system which vastly reduces air consumption and reduced end of line filtration requirements due to their air return system. This system removes a portion of the air that is supplied to the Venturi to create the vacuum and returns it back to the blower unit to be recycled.
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