One quotation says 185 bar; another says 140 bar. Before ranking the machines, check the labels. You may be comparing maximum pressure with operating pressure. Importers and distributors need figures that belong in the same specification table, not just the largest number on the packaging.
Ask suppliers to define each pressure figure and provide the corresponding rated flow, nozzle configuration and test conditions. With those aligned, assess the cleaning surface and area the machine is intended to serve.
Keep the original parameter labels
The official Bosch GHP 5-75 X page lists maximum pressure of 185 bar, operating pressure of 140 bar, rated flow of 9.3 L/min and maximum flow of 9.5 L/min. These are that model's published specifications, not FORZMAX product data. Bosch official specifications.
One machine has two pressure figures and two flow figures. Keep “maximum”, “operating” and “rated” in your comparison sheet. If a quotation supplies only maximum pressure, leave operating pressure unconfirmed and request it. Do not copy the maximum figure into the missing field.
Manufacturers may use different labels and test conditions. Do not assume every maximum-pressure figure means the same short-duration peak, or that similar labels guarantee comparability. Ask how each figure was obtained and which pressure and flow figures describe the same operating point.
Include flow in the comparison
Comparing bar alone leaves out water volume. Kärcher identifies the combination of pressure and water volume as a factor in cleaning performance. Kärcher performance guidance.
Dirt, surfaces and nozzles still matter. A distributor supplying machines for paved courtyards should not make the same recommendation for vehicle paint solely on maximum pressure. Confirm approved accessories and operating methods. This article does not establish a pressure that is safe for every surface.
Standardize units without changing their meaning: 600 L/h = 10 L/min; 140 bar = 14 MPa. Preserve whether the source calls the figure rated or maximum.
Do not multiply separately listed maximum pressure and maximum flow to rank cleaning performance unless the documentation confirms they can occur together under the same conditions. Otherwise, that ranking has no established basis.
Ask both suppliers for the same information
Before comparing prices, request the following. Mark missing answers as unconfirmed:
- Operating/rated pressure, corresponding flow and test conditions.
- Maximum pressure and maximum flow, recorded separately from operating figures.
- Test or supplied nozzle and gun, high-pressure hose length and connection type.
- Water inlet requirements: minimum supply flow, permissible temperature and pressure. For tank-fed use, confirm model support and required accessories separately.
- Voltage, frequency and plug for the destination market, plus the manual's operating requirements and limits.
The sheet establishes comparability; it does not replace inspection. For a sample demonstration, have the supplier follow the manual and agreed conditions, recording the accessories used. Do not block a nozzle or modify a machine to obtain a higher reading.
Describe the site in the enquiry
Explain what needs cleaning, the area, the dirt and the available water and electrical supplies. For frequent use, state the expected usage pattern and request a suitable model backed by its manual. A “professional” label alone does not establish continuous-duty capability.
Confirm how replacement guns, hoses, nozzles and seals are ordered and whether their connections match. Identical pressure figures do not make accessories interchangeable.
When contacting FORZMAX, send the cleaning task, usage frequency and site utilities. Attach any existing specification sheet and highlight pressure or flow fields that need clarification. Send an enquiry.
The cover is an AI-generated conceptual illustration, not a FORZMAX sales model, factory photograph or test result.