| 摘要 |
An apparatus for spraying liquid surface treatment material has a housing (11), a liquid inlet for supply of the liquid surface treatment material, and a gas inlet for supply of pressurized gas to be mixed with the liquid surface treatment material. The apparatus also has an outlet nozzle through which the gas and liquid surface treatment is sprayed, a control needle valve adapted to regulate the supply of the liquid surface treatment material to the outlet nozzle, and a gas supply passageway connecting the gas inlet to the outlet nozzle. A control means for controlling the control needle valve is provided in the form of a cap member (15) received on the housing (11) and engaged with the control needle valve. The cap member (15) is adjustable in the axial direction relative to the housing (11) to limit axial movement of the control needle valve. The cap member (15) and housing (11) are each provided with a plurality of indicators (16,17a,17b) which indicate the limit applied to the axial movement of the control needle valve thereby allowing for repeatable adjustment of the spray pattern of the apparatus. |
