Size | 5 Considerations for Hydraulic Hose Replacement

5 Considerations for Hydraulic Hose Replacement #1 Size - STAMP - GRO

Seems, simple: you just need to replace your hose. You’ll take the same one you had in your equipment or machine as before, it was doing the job. Was it? Are you consistently replacing it? Is it needing frequent maintenance in between replacements? How about getting the best value and maximizing the life expectancy of your hose and equipment, saving money and time. And maybe, more importantly, reducing downtime and potential damage and injury.

We suggest following the S.T.A.M.P. method to help remember what to consider when selecting a replacement hose or to determine if the same hose is the correct one. The 5 things you need to know are size, temperature, application, media, and pressure. Over the next five posts, we’ll review each step of the method in detail.

First things first: Size

Like water through a garden hose, your hydraulic hose has oil running through it. The speed the oil is traveling at is velocity. Oil moving too fast can cause system damage, leaks and generate heat and heat in a hydraulic system is a sign of inefficiency. Oil moving too slowly will result in lower pressure and poor performance.  

So what does oil velocity have to do with hose size?  Everything!  Look at this cross section of hose. 

5 Considerations for Hydraulic Hose Replacement #1 Size - Hose Cross Section - GROThe center is the inside diameter (I.D.). The fluid power industry uses a universal measuring system called Dash Numbers to indicate I.D. in sixteenths of an inch (note: with the exception of Transportation and Refrigerant hoses). A hose I.D. that is too small will increase the velocity of the oil and if too large, the oil will be too slow. So how do you decide the right size to obtain the proper flow velocity? The Parker Hose Products catalog 4400 Technical Section provides a Flow Capacity Nomogram to help determine the correct hose size based on the proper flow rate of your system.

In addition to the Parker Hose Products catalog 4400, your local ParkerStore is also a great resource for questions or additional technical information when determining the correct hose for your application.

We’ll continue our series with the second step of the S.T.A.M.P method: Temperature considerations. If you'd like to review all five steps in detail, check out our ParkerStore S.T.A.M.P. video on our website.

ParkerStore Team Logo - GRO Post contributed by: 
Suzanne Favri, Digital Marketing Specialist
Global Retail Operations, Parker Hannifin





Other ParkerStore related posts
Best Practices for Hose Installation and Routing Rules
5 Considerations for Hydraulic Hose Replacement I No. 2 Temperature
5 Considerations for Hydraulic Hose Replacement I No. 3 Application 

5 Considerations for Hydraulic Hose Replacement I No. 4 Media

5 Considerations for Hydraulic Hose Replacement I No. 5 Pressure

How to Choose the Right Fluid Power Hose

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