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The principles of spraying

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What is spraying?

Spraying has several meanings. We aim:

There are several way to spray:

Case Process usedAdjustment of the liquid flow
1 by pushing a liquid under high pressure through a nozzle (sample: a gas oil injector). by changing the liquid pressure or features of the nozzles (the nozzle or its section, for sample with a cone-point screw).
2 by supplying a nozzle with a gas. The pressure is sufficient to suck the liquid up and to spray it. by changing the gas pressure or with a flow regulator set on the liquid circuit.
3 by throwing through a nozzle a mist made up from a gas and a liquid.
The nozzle is not used to create the mist.
by changing the mist concentration or its flow.
4 with a nozzle separately fed with liquid and compressed gas.
The gas sprays the liquid but does not suck it up.
with something included in the device which feeds the nozzle with liquid.)

Most of the time the used gas is air

The sprayed quantity of liquid may be adjusted by changing the spraying duration.

The shape of jets

The shape of the jet is a feature of nozzles. It is sometimes adjustable.

Spraying and microlubrication, minimum quantity lubrication (MQL)

Most microlubrication devices are designed to spray as case (3) or (4). In fact, they are fitted with nozzles supplied in liquid by a micropump and in compressed air with a flow regulator or a pressure regulator. The liquid flow is adjusted with the capacities or micropumps capacity or by changing the timing of micropumps.

Microlubrication spraying is also named microspraying.

ACOVAL spray devices

VIBRACO builds: