Nozzle size calculation

To select the right nozzle, you need 2 pieces of information, namely the working pressure and the pump capacity in liters per minute. In the nozzle table, the nozzle size is on the left and the working pressure (bar) is at the top. Find the working pressure of your pressure washer and then scroll down in the same column until you come across the pump capacity in liters per minute. If the exact number of liters is not listed, take the closest capacity. On the same line, on the left side you will find the correct nozzle size for your pressure washer.

Example: at a working pressure of 120 bar and a yield of 10 liters/min, nozzle size 040 is recommended. Round down the number of liters (yield) in the table.

For Karcher K Series pressure washers:

  • Karcher K2-K4: we recommend a 3.0 orifice (030)
  • Karcher K5-K7: we recommend a 4.0 orifice (040)

For Kranzle pressure washers:

  • Kranzle K7: 3.0 orifice (030)
  • Kranzle K10: 4.5 orifice (045)
  • Kranzle 1152 TST: 4.5 orifice (045)

For Nilfisk pressure washers:

  • Please contact us and tell us the model and specifications of your pressure washer.
Nozzle size calculation