When it comes to cleaning, a high-pressure nozzle has the ability to determine a high-pressure washer’s performance, which in turn, influences the cleanliness of the relevant object or surface. Whether you’re looking to do outdoor surface cleaning or large-scale industrial cleaning, choosing the right nozzle for a high-pressure washer will also impact the maintenance of the machine in the long run. But wait… there’s more. Today’s blog will provide valuable insight into the importance of nozzle sizing, how to choose the correct nozzle size, as well as how often a nozzle should be replaced.
What is a Nozzle and What are the Different Types?
The nozzle, positioned at the lance’s end, is the final component of high-pressure cleaners’ flow of water. The water and/or cleaning agent initially travel through the pump system, then through the high-pressure hose to the gun, and finally to the lance before it reaches the nozzle. Our drain jetting nozzles are ideal for unblocking drains and sewer pipes in that they shoot high-pressure water jets that effortlessly flush out sewage, roots, grime and debris.
Why is Nozzle Sizing Important?
Before delving into the importance of sizing a nozzle, it’s important to note that pressure from a high-pressure washer is determined by this very component. In layman’s terms, over-sizing a nozzle has adverse effects on a pressure washer’s cleaning performance, while under-sizing a nozzle places unnecessary strain on and may damage critical machine components.
More specifically, if a nozzle is too small, it typically places stress on the pressure washer’s unloader, as excess water is forced through the bypass. In doing so, this induces wear on the unloader and is likely to cause the operator to over-adjust the unit’s pressure. In contrast, if a nozzle is too big, it will cause a drop in the pressure exerted by the machine.
How Do I Choose the Correct Nozzle Size, and How Often Should I Replace It?
To choose the correct nozzle, it is best practice to consult our nozzle chart, as can be seen below. To navigate the chart and determine the right nozzle, you will need to align your pressure washer’s rated pressure (bar) and flow rate (litres per minute). Once you have done so, it’s advised to use a nozzle that is one size smaller than what is supplied on the chart.
Over time, as a high-pressure washer is repeatedly used, the water will begin to wear out the nozzle, causing the hole (orifice) in the nozzle to enlarge. As a result, the size and spray pattern of the water are altered, causing a pressure drop and longer cleaning periods. Hence, by under sizing a nozzle, you can ensure its longevity. It’s obvious from this that a nozzle does not need to be broken to be replaced. To ensure that your machine performs at an optimal level, we recommend replacing your high-pressure nozzle with every machine service.
CEMSA's Nozzle Chart
At CEMSA, we stock a variety of nozzles for high-pressure washers. Since these components have a significant influence on the operating pressure of a high-pressure machine, we highly suggest regular nozzle replacement, as this will ensure maximum machine performance. Got an inquiry about nozzles? Don’t hesitate to contact your nearest CEMSA branch or distributor via our contact page.
