Pressure Compensated Flow Control - Part 3

Part 1: • Pressure Compensated F...
Part 2: • Pressure Compensated F...
Did you notice that this flow control is also a pressure reducing valve? Let's dig into that, and look at the system dynamics when the supply pressure changes.
Learn Hydraulic and Electrical concepts with hundreds of these interactive simulations at www.lunchboxse...

[@carlosalbertoruacastro8453]

Extraordinaria clases maestro, es usted mi admiración, con sus clases refuerzo mi conocimiento su manera didáctica y calmada es impresionante.

[@ToolsAandLogic]

EXCELLENT WORK, BUT PLEASE ADD SOMETHING TO SHOW, THAT WHAT WILL HAPPEN IF NON PRESSURE COMPENSATED FLOW CONTROL VALVE IS USED. SO THE IMPORTANCE OF USING PRESSURE COMPENSATED FLOW CONTROL VALVE WILL BE UNDERSTOOD. LIKE SIDE BY SIDE COMPARISON OF BOTH FLOW CONTROL VALVES

[@Prius_Life_Below_Zero]

Very informative, thanks. Would you happen to know a device that would drop the pressure from 3000psi to 1500psi, flow isn't important

[@widoelma3lem]

This is great keep up

[@galomateo1]

pardon my comment but... i would say that the little error that appears when you strive from the design value is due to the non consant force from the string rather than the preassure loss in the path. (there's no fluid speed in that path). The secret for this valve to work is that magic string wich force isnt F= k * (l-l0) but simply F=k.

[@davemakesitmove]

What software do you use for the animations? I teach at a college and could really use this type of software in my lectures. Your series of technical videos are very well done.

[@jenniferendres4943]

It seems to me that this system would be efficient when the pressure at the motor approaches the pressure compensator set pressure. If this system is flowing 10gpm through a 1,000 psi drop across the valve, the energy loss is 10*1,000/1714 = 5.8 HP = 14,842 BTUs/Hr heat added to the fluid. Can the pressure compensator reference to motor pressure, rather than pump discharge pressure, to make these values run closer together to minimize the pressure drop across the flow control valve, and reduce the amount of work dissipated as heat?

[@adityashah8635]

Very much helpful for electrical people

[@sathishr7774]

Orifice eqn says Q=A (delta p)^0.5 area and delta p constant so flow becomes constant

[@brandanhall1138]

Hi Karl would this valve only ever be used with a fixed displacement pump or are there applications where you would have it inline with a variable displacement pump? Brandan

[@rahulprasad1509]

How is the source pressure(2000psi) not changing, while changing the resistance of motor? Please describe.

[@hrishikale7209]

How flow rate can vary if the pump is positive displacement ? Positive displacement pump are those who maintain constant flow rate even though pressure changes.

[@gabeziIIa]

It's assumed there is a relief valve upstream of this, or the positive displacement pump is also pressure compensated to vary flow rate.

[@adambell2068]

I guess you didn't watch the whole video...

[@sathishr7774]

@@gabeziIIa Do relief valve control flow ? It just relieves excess pressure , so how the flow is balanced between the relief valve and pressure compensator?

[@deadman1462]

Hello, i think concept of steering control unit is more trivial. Can you please do a series on steering control unit? Regards, Supreeth R

[@workwillfreeyou]

Thanks Karl. Does any of these valves have adjustable springs?

[@funone8716]

And if the spring breaks, all flow stops?

[@NithinNayak-dm2ii]

I guess, Flow would be there, but the flow would be as in the case of non compensating valve

[@peterdraper4987]

So if the oil supply is via a gear pump, what happens to the excess flow?

[@aidwilli]

it would go through the pressure relief valve that is setting the supply pressure

[@tarekbakareng9531]

Why use this option as long as if the pressure exceeds it's limit the relief will open and thus reduce the flow rate

[@aidwilli]

@@tarekbakareng9531 waste power and generate heat with relief valve

[@victorsimukoko9304]

Remember, flow restriction increases the pressure which helps to act on the spring. Reduction in pressure increases the flow (vol/ time)