Abstract: Apparatus for spraying mould parting agents and other substances having a conduit for circulating the substance, and spray nozzle equipment having a first bore connected to the conduit for a circulation of the substance therethrough. A second bore in the equipment intersects the first bore at an angle and extends to a spraying device. A nozzle pin in the second bore has a third bore for supplying a pressurized medium to the spraying device and is adjustable for a regulation of the supply of circulated substance to the spraying device. Additionally or alternatively, part of a conduit for circulating a sprayable substance is connected to a pump submerged in a supply of that substance and is actuated for actuating the submerged pump.