Edwards Limited

David Paul Manson

Phillip North

Huw David Powell

Stephen Edward Downham

Kristian Laskey

Huw Powell

Myoungsuck Lee

A pump comprises a rotor arrangement and a stator arrangement. The stator arrangement comprises a first part made from a corrosive resistant material which defines a volume which in use is swept by the rotor arrangement for pumping fluid from an inlet to an outlet of the stator arrangement. A second part of the stator arrangement is made from a thermally conductive material which envelopes the first part so that heat generated in the first part can be transferred to the second part at the interface surface between the two parts. The second part has formed therein at least one duct for conveying a liquid coolant through the second part so that heat can be transferred from the second part to the liquid coolant for cooling the stator arrangement.

Pump enveloped with thermally conductive material

A method for managing deposits within a pump mechanism () is provided. Fluid suitable for dissolving, diluting or otherwise disengaging deposits which have accumulated on the internal working surfaces of the pump is brought into contact with the mechanism. The performance of the pump is monitored and this data is used together with process data received from, or associated with, a tool () being evacuated by the pump to calculate () fluid flow characteristics which are required to compensate for the accumulation of deposits on the internal working surfaces of the pump. Fluid is then introduced () into the pumping mechanism in accordance with the calculated fluid flow characteristics.

Cleaning method of a rotary piston vacuum pump

A system () for supplying an inert purge gas to a pumping arrangement () includes a plurality of flexible capillary tubes () each for conveying the gas from a respective outlet of a manifold () to a respective port () of the pumping arrangement (). The internal diameter and length of each tube () control the gas flow rate to the respective port ().

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New Haven, United Kingdom

David Paul Manson