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Hydraulic Load Sensing design FAQ

Dzyanis May 20, 2016 0 Articles load sensing, valve 127 Views

By subscriptions I have received the separate links to “Load-Sensing Systems FAQ” from different suppliers. To read them you need to click the links below, fill the forms and download the PDF files with FAQ:

“Hydraulic Load Sensing design FAQ“, sponsored by HAWE Hydraulics.
“New Valve Technologies Improve Load- Sensing Systems “, sponsored by EATON.

Of course, it’s free. Next questions are discussed there:

How can load sensing be beneficial to a hydraulic system?
What is the typical efficiency of a hydraulic system?
What are the problems when flow is fixed?
How is load sensing technology energy effective?
etc.

Valve adjustment chart – Number of turns

Dzyanis August 13, 2015 0 Calculators adjustment, valve 217 Views

Here you can find the online chart which let you easy adjust any flow or pressure valve using its settings range and the available number of turns.

Pilot Operated Check Valves or Counterbalance Valves?

Dzyanis July 13, 2015 1 Articles check valve, counterbalance, valve 442 Views

Summary:

When use Pilot Operated Check valves?
When use Counterbalance valves?
Design advises for topic valves.

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First of all, Pilot Operated check valves are NOT a cheap solution of Counterbalance valves.

Yes, both of them have next the same benefits:

Prevent a load from dropping in case of hose or tube failure.
Prevent a load from drifting caused by directional control valve spool leakage.
Leak-free load holding.

But each of them has the specific applications.

Pilot ratio & pilot pressure of counterbalance valves

Dzyanis September 9, 2014 0 Articles counterbalance, valve 971 Views

Summary:

Understanding the pilot ratio of the counterbalance valves
Calculations the pilot pressure of the counterbalance valves for different applications

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Lower pilot ratios will increase system stability and provide better motion control. Therefore, the vast majority of counterbalance applications are satisfied with a 3:1 pilot ratio.

Higher ratios will be more efficient (reduce heat generation) but at the cost of stability and smooth motion control. This is why 10:1 pilot ratio valves, generally, should be avoided. But, sometimes, on motors high pilot ratios will provide adequate dynamic control.

Two areas work to open a counterbalance valve, the relief area (port 3) and the pilot area (port 1); the pilot area divided by the relief area equals the pilot ratio:
cbv

Tag Archive: valve

Hydraulic Load Sensing design FAQ

Valve adjustment chart – Number of turns

Pilot Operated Check Valves or Counterbalance Valves?

Pilot ratio & pilot pressure of counterbalance valves

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