Pilot Operated Pressure Reducing Valve - Part 1
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- Опубликовано: 8 ноя 2024
- A quick overview of the behaviour of a Pilot Operated Pressure Reducing valve. There's a lot going on, so you should rewind or replay the video until it all makes sense. For more, take a look at www.lunchboxse...
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At 0:24 we have a 2000 pounds held by a 10 inch area and it gives 200 psi pressure . Then how does the load move in this case when the force is balanced . Should we set the valve a little higher?
Hi , hope you are good. Wanted to know your views on Pressure reducing valves. When I checked, seems that they all have internal leakage through their pilot line. I mean , for a pressure reducing valve to work , the pilot line must drain oil to tank.
So if any pressure reducing valve is connected to an accumulator, it will drain the accumulator till the preset pressure is reached and pilot drain flow will stop !
Am I right? Can pressure reducing valves be used with accumulators? For example, can we have a 3 way pressure reducing valve without internal leakage?
Do we have any models of 3 way pressure reducing valves without leakage?
Does leakage happen when valve is off ?
For e.g suppose I have a 3 way proportional pressure reducing valve; when valve is off , output pressure is zero. If this valve is connected to an accumulator, will it drain all accumulator oil little by little? Will leakage occur when valve is off ?
Thanks.
Kind Regards.
Please give us solenoid operated relief valve tutorial.
Generation 5th do you wish for the tutorial to cover relief valves that have a On-Off solenoid for an unloader section, or do you mean electro-hydraulic, proportional pressure relief valves?
Do U use a check valve with that one or it got it on
which software you r using to develop these mechanisms
We've got some information about how we make these simulations here on our website: www.lunchboxsessions.com/help/what-software-do-you-use-to-make-the-simulations
If preset spring setting of reducing valve is let say 150PSI and a actuator connected at outlet of valve requires pressure more or less than 150PSI to be actuated, then how does reducing valve maitain 150PSI pressure.
Pawan Gundariya Thanks for your excellent question. If the valve is preset for 150, the outlet pressure will be limited to 150 maximum. The cylinder will simply not be actuated at all, it the cylinder load is greater than 150 PSI. Keep in mind that the pressure reducing valve is not a flow controlling device, and as such, does not try to accomplish a flow rate. This valve is better thought of, in this application, as a force controller. Does that answer help a little?
Does this valve relieve the downstream pressure
How many more years should we wait for part 2? 5 years are not enough?)
haha，good question
where is part two ?
We haven't made the part 2 video yet. Stay tuned!
Does this hold the load if the inlet flow is switched off ?
It is definitely not meant to do that. It may hold for a short time, but definitely do not count on this. It’s only and primary function is to limit pressure on the downstream port.
@@lunchboxsessions Schematically , it looks like it will hold . Is it due to the main spool clearance ?
Can anyone explain why does the outlet piping has a smaller diameter than that of inlet to valve?
Thanks
Amr Reda I had a recent case, where the back pressure was not an issue ( pressure drop in outlet piping was much less than 10% of set press), but the mach number was. So, we preferred to move the location of sudden pressure drop further down the relief header, and not very close to the PSV itself. So, we did not mind to create higher delta Ps right after the valve. Not sure if this pertains to this specific case, but was an example of wanting higher pressure drops in the tail pipe.
what the application are you using?
We've got some information about how we make these simulations here on our website: www.lunchboxsessions.com/help/what-software-do-you-use-to-make-the-simulations
Right
thanks
Bro sounds like a robot
My
thanks