What are the advantages and shortcomings of the basic spray (combination) nozzle?

The main advantage of the combination or spray nozzle is that it is provided with a pattern changeover mechanism as well as a shut off arrangement. The pattern changeover mechanism allows changing the pattern from jet to spray or vice-versa, while the shut-off mechanism allows the operator to shut down the flow, when required.

In the basic spray nozzle, the flow varies as the pattern changes from the hollow jet to the spray pattern (normally the flow in jet pattern is lesser and increases as the pattern changes to fog)

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