Patent ID: 8640644

Claim:
Powder spraycoating equipment comprising: a dense phase powder pump containing at least two feed chambers, the equipment being configured such that alternatingly powder is aspirated by vacuum from a powder conduit into one of the feed chambers while powder is being discharged from another of the feed chambers via compressed conveying air into a powder discharge conduit to be sprayed by a spray tool; and a control unit in which is stored a conveying-air function which, in relation to powder rates to be delivered by the dense phase powder pump defines associated utilitarian rates of compressed conveying air, the rate of compressed conveying air increasing/decreasing with an increasing/decreasing powder rate; where the control unit is fitted with an adjusting element is configured to adjust a powder rate to be delivered by the dense phase powder pump; where the control unit is configured to automatically adjust the utilitarian rate of compressed conveying air in relation to the adjusted powder rate using the stored conveying-air function; the equipment further including valves which are driven by the control unit in a manner that the adjusted powder rate is delivered by the dense phase powder pump at the utilitarian compressed conveying air rate defined by the stored conveying-air function through the powder discharge conduit to the spray tool.