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Solvent Alternatives Guide
High Pressure Sprays

General Information

  • High-pressure spray is very effective at particle removal and excellent for cleaning blind, tapped holes.

  • High-pressure spray cleaning may use any of the following chemistries:

  • High-pressure sprays are probably not necessary for lower cleanliness levels. For example, the removal of machining chips does not require high pressure; however, the removal of lapping compounds might.

  • Nozzle design greatly influences process efficiency. Nozzle design range from fan jet to needle jet.

  • A basic cleaning system consists of:
    • Liquid supply
    • Supply pump with filter
    • High-pressure pump with filter
    • Spray wand (removable nozzles increases adaptability)
    • Tank or booth (use of a glove box is common).

  • Any chemical additive must have very low foaming properties.

  • Process optimization involves:
    • Nozzle design
    • Nozzle configuration within spray header (spray pattern)
    • Impingement angle
    • Cleaning liquid chemistry
    • Pressure (flow rate)
    • Dwell time.

  • Redeposition of contaminant from spray bounce-back may be a problem.

  • High-pressure spraying can achieve all levels of cleanliness. The cleanliness level required will dictate cleaning system filter requirements.

  • High-pressure spraying can be done with a manual spray wand or an automated spray header.

  • It may be used alone or as part of a system combining other process steps.

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    Last Update: 23 May 2001