Pressure | 5 Considerations for Hydraulic Hose Replacement

5 Considerations for Hydraulic Hose Replacement #5 Pressure - STAMP - GRO

We’ve reached our final step in the S.T.A.M.P. method. Here’s a look back at the first four steps:

  • Step No. 1: Size. Correlation between hose I.D. size, flow velocity and the efficiency of your hydraulic system.
  • Step No. 2: Temperature. Consideration of both ambient & media temperature's.
  • Step No. 3: Application. Identification of important requirements specific to your application.
  • Step No. 4: Media. Beyond its temperature, a look at media's chemical compatibility effects, core to metal.

The final thing to know before selecting a replacement hose is pressure. Many times when considering a hose, technicians focus solely on the pressure relief valve limit or maximum working pressure. However, much like temperature, two pressure types must also be known: system pressure and impulse pressure (any pressure spikes or surges). When looking at your current system, is it dynamic or static? Dynamic meaning the operating pressure fluctuates and there is potential for vibration, shock and temperature changes. Static is a system essentially free of the vibration, shock and temperature changes once the system is pressurized.

5 Considerations for Hydraulic Hose Replacement #5 Pressure - Blown Fitting - GRO

If you're working with a dynamic system, make sure your replacement hose has a working pressure equal to or greater than both working and impulse pressures to account for any pressure spikes, vibrations and shock. Similar to media, pressure considerations should cover your assembly in its entirety, including the hose ends. For example, a 5,000 psi hose that has 3,500 psi hose ends is not capable of withstanding 5,000 psi of pressure. This could potentially cause pressure issues from leaks, bursts of the hose, fitting blow off, damage to the entire system or injury. The hose assembly in this case, is rated for the lesser of the two pressures at 3,500 psi. Rule of thumb is to identify the highest pressure of the system and match to the lowest pressure component (the weakest link).

The S.T.A.M.P. acronym will help you determine the proper assembly replacement components for any application. Providing you with an efficient, durable and most importantly, safe operating system. Find our ParkerStore S.T.A.M.P video on our website for a full recap of each step. Plus, S.T.A.M.P. is also available at your fingertips with the HoseFinder App, download it today at And for detailed pressure rating charts and conversions, please reference the Technical section of the Parker Hose Products catalog 4400.

And if you’re looking for a knowledgeable professional, your local ParkerStore is right around the corner with the advice and product information to help you select the right replacement components for your application.

Post contributed by:
Suzanne Favri, Digital Marketing Specialist
Global Retail Operations, Parker Hannifin




Other ParkerStore related posts:
5 Considerations for Hydraulic Hose Replacement I No. 1 Size
Best Practices for Hose Installation and Routing Rules

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