maintaining liquid level in 500 gallon tank.
maintaining liquid level in 500 gallon tank.
(OP)
Hi guys,
Could some body help me out with a smart way to maintain fluid level in 500Gallon capacity tank. the fluid will be bled out contimously for various purposes, so the system needs to replenish the the fuel level and ensure the fuel level never reduces.
I was thinking about using a sensor arrangement ,i.e a pressure tansducer attached to the bottom of the tank will give the a value of pressure when the tank is completely filled. this pressure value wil be the reference value. when there is a decrease in pressure, the sensor needs to operate a gate valve to let fuel into the tank and once the pressure has reached the reference value, it needs to shut down the flow my itself.
Can anyone suggest a easier and more reliable technique, cost is a factor.
Cheers.
Could some body help me out with a smart way to maintain fluid level in 500Gallon capacity tank. the fluid will be bled out contimously for various purposes, so the system needs to replenish the the fuel level and ensure the fuel level never reduces.
I was thinking about using a sensor arrangement ,i.e a pressure tansducer attached to the bottom of the tank will give the a value of pressure when the tank is completely filled. this pressure value wil be the reference value. when there is a decrease in pressure, the sensor needs to operate a gate valve to let fuel into the tank and once the pressure has reached the reference value, it needs to shut down the flow my itself.
Can anyone suggest a easier and more reliable technique, cost is a factor.
Cheers.





RE: maintaining liquid level in 500 gallon tank.
Good luck,
Latexman
Need help writing a question or understanding a reply? forum1529: Translation Assistance for Engineers
RE: maintaining liquid level in 500 gallon tank.
Assuming you can't do that then what you describe is a baisc level control system. Many levle gueages now run on pressure, translating pressure at the bottom of a tank into level using the SG of hte fluid. A simple PLC controller then monitors the level and adjusts an output sisgnal to positiion a control valve, not normally an on/off valve like a gate valve, to maintina the pressure. This is pretty easy, but does need 24V and a bit of wiring.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: maintaining liquid level in 500 gallon tank.
Independent events are seldomly independent.
RE: maintaining liquid level in 500 gallon tank.
This guy is talking about fuel - he won't use an EXD switch = BOOM. As usual nowhere near enough info to make a decent fist of it (is it pumped flow?, is it gravity?, is there power,.....)
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: maintaining liquid level in 500 gallon tank.
RE: maintaining liquid level in 500 gallon tank.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: maintaining liquid level in 500 gallon tank.
Independent events are seldomly independent.
RE: maintaining liquid level in 500 gallon tank.
to provide you with some more information:
The application is used for a jet pump performance test. We have a jet pump placed in a pressurisd tank which is provided with a motive flow. The motive flow is provided from a different tank. since it is a performance test we use different temperatures and pressure for the fluid which is supplied, also the tank needs to be pressurized for various performance conditions. the tank which the jet pump is sitting on is the one which needs the fuel level to be maintained.
the fluid used for the test is Jet-A
Also,
"translating pressure at the bottom of a tank into level using the SG of the fluid" frm ur previous post. Instead of this, can we use use a twin pressure tannsducer arrangerement in the pressurised tank and maintain the height of the fuel using the formulae h=(P2-P1)/(density * gravity). once a reference value of h is obtained , programme a PLC to maintain the height of fuel using a valve arrangement. does this setup bring any joy to you.
RE: maintaining liquid level in 500 gallon tank.
Good luck,
Latexman
Need help writing a question or understanding a reply? forum1529: Translation Assistance for Engineers
RE: maintaining liquid level in 500 gallon tank.
In this instance what you really need is a differential pressure transmitter (DPT) with one end open above the max liquid level and one end at the base of the tank. Then with the SG programmed in, the transmitter will give you liquid level regardless of the pressure in the tank (P tank) as this presusre will act on both ot the DPT, essentially as you note with P1 and P2, just this is in one transmitter.
What you do with that level signal is then plug it into a PLC which has a PID loop in it which oututs a position of a variable control valve. To translate that position signal into actual valve posiiton you need some sort of motive power, commonly air via a E/P convertor and an air driven position switch. Very common in the petrochem industry. Or the PLC can open / close a solenoid valve, but variable control valves are much smoother... you can get electric control valves as well.
did I guess it right?
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: maintaining liquid level in 500 gallon tank.
I've plumbed a level control arrangement like this in the past, but added heat tracing to the vent-space line to ensure no liquid build-up could occur. That was a different fluid, and may not be an option for you depending on flammability limits etc...
RE: maintaining liquid level in 500 gallon tank.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: maintaining liquid level in 500 gallon tank.
Good luck,
Latexman
Need help writing a question or understanding a reply? forum1529: Translation Assistance for Engineers
RE: maintaining liquid level in 500 gallon tank.
how will you know to replenish the fuel if the level never reduces?
RE: maintaining liquid level in 500 gallon tank.
Mike McCann
MMC Engineering