Calgary, Alberta, Canada dzyanis@engineer.com

Fluid Power Pro

Hydraulic tank volume

The main rule for hydraulic tank sizing is: “bigger is better”, but because there isn’t always exists a possibility to find a lot of space for tank (mostly in mobile applications) we need to know and follow min requirements for system calculation.

Just wanted to summarize all info I have for estimation of hydraulic tank volume:

Min. value Recommendation
Industrial application – Mineral Oil
2.5 times of all pumps flow + 10% for air cushion 3..5 times of all pumps flow + 10% for air cushion
Industrial application – HFC/HFD
5 times of all pumps flow + 10% for air cushion 8 times of all pumps flow + 10% for air cushion
Mobile application – Open loop pumps
1.5..2 times of all pumps flow + 10% for air cushion 2.5 times of all pumps flow + 10% for air cushion
Mobile application – Close loop pumps
1..2 times of all CHARGE pumps flow + 10% for air cushion 1.5..2 times of all pumps flow + 10% for air cushion

Please correct me if I’m wrong.

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