PCT No. PCT / JP97 / 02446 Sec. 371 Date Mar. 18, 1998 Sec. 102(e) Date Mar. 18, 1998 PCT Filed Jul. 15, 1997 PCT Pub. No. WO98 / 03268 PCT Pub. Date Jan. 29, 1998A paint spraying apparatus on which a number of paint applicator units of different types can be selectively and replaceably mounted depending upon conditions of a paint
coating operation required. A color changing valve
assembly is provided in a valve casing which serves as a
common base assembly for a number of paint applicator units to be chosen from, including rotary atomizing head type electrostatic paint applicator units and spray gun type electrostatic paint applicator units. Accordingly, depending upon conditions of
coating operation, such as shape of a
coating surface, nature of paint, properties of
solvent etc., a suitable paint applicator unit, selected from the paint applicator units, can be easily and replaceably mounted in position on the valve casing. The color changing valve
assembly which is provided within the valve casing can be shared as a common
mount base by a plural number of paint applicator units of different types.