Valve adjustment chart – Number of turns
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.
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.
Summary:
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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:
But each of them has the specific applications.
Summary:
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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: