Vws (uk) Limited

Vws Limited

John Andrew Walker

Lee Underwood

Paul Whitehead

Alan Denton Mortimer

Nigel Philip Emery

A method of providing at least two outlet purified water streams from a water purification system by providing a first purified water into a first reservoir able to provide an outlet purified water stream. At least a portion of the first purified water is passed from the first reservoir through a water purification process to provide an ultra-purified water stream. The ultra-purified water stream is passed to a second reservoir. An excess of ultra-purified water is provided into the second reservoir beyond a pre-determined quantity, The excess ultra-purified water in the second reservoir is allowed to flow from the second reservoir into the first reservoir. An outlet from the water purification system of an ultra-purified water stream is provided from the second reservoir.

Method and system for providing purified water

A method for monitoring the effectiveness of an ion exchange module in an ultrapure water purification circuit containing ultrapurified water and having a purified water inlet and a point of use outlet and a memory, the method including the steps of measuring the resistivity of ultrapurified water using one or more sensors to provide an ultrapurified benchmark resistivity value R; introducing purified water into the circuit and passing the water through the ion exchange module; measuring the resistivity of the water to provide a new water resistivity value R; and comparing Rand Rto determine the effectiveness of the ion exchange module.

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Berkshire, United Kingdom

John Andrew Walker