Underwater Ram Pump
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- Опубликовано: 7 фев 2025
- This video shows that the ram pump can be used underwater. I wanted to find out how practical it was to run the pump underwater. Seems like the pump works well and is a little bit quieter.
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The reason for the slightly less pressure underwater is that the height up the water level in the black tub is what determines the ' drop ' of your ram pump. You lost a foot of drop when the tub was full. Depending on the situation, it still might be a good thing just for noise reduction.
this design makes more sense than above ground ram pumps because the pressure of the water would help keep less air in the system so probably pump move volume/pressure.
..interesting it shows the same volume.
Nice to see someone test underwater as thats what I was planning.
I have a feeling that this works well with minimal underwater depth. If it were to go too far it would start to reduce the head pressure because the hydrostatic pressure increases.
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Connecting a stand pipe to the the waste valve to above water level should fix this?
Would need a long rod to prime the pump.
Adding that pipe would actually reduce the head pressure.
The weight of the water when the tub is full reduces the pressure. The waste water has a more difficult time exiting the pipe so pressure going to the elevated pipe is less. Its like you put a vertical pipe in the waste valve, the taller the vertical pipe gets, the lower the pressure. The flow rate =Area of the pipe times the velocity of the water. 8 Lbs of pressure in not sufficient to change the velocity significantly since the water stops accelerating when the valve is closed (which it is half the time). Almost 100% of the flow rate will be determined by the vertical difference between the 5 gallon bucket and the top of the waste valve. If the waste valve is underwater then the flow rate will be determined by the difference between the top of the water and the 5 gallon bucket. You don't need the long sloping pipe. Just move the 5 gallon bucket next to the waste water pond and experiment with moving the bucket up and down. Good video! cheers!
Michael Edwards 😩😩
Michael, are you saying that the pressure of the water that is pressing on the waste valve makes a difference on the flow of the water and pressure of the water in the pipe that is pushing out of the pump (not the pipe that delivers water from the source).? if so, would the height of the bucket (source) opposed to the height of the water pushing back on the waste valve have any effect on the pressure of the pump? And if so, would more one way valves up the waste pipe mitigate any ill effects caused by back pressure on the waste valve, and if so, would you think that it could be possible that the waste water could then be pumped high enough be gravity fed back into the source bucket so that there is only water lost through evaporation and or consumption...... Hypothetically speaking?
So, if someone had an NFT garden system where the source water ( rain collection barrels) were at height point 0, water flowed to a ram pump at, say, height point -10 (down hill to the end of the NFT system), could the waste water be saved by having it pump up to just above the source level (say, height point 1) so that the NFT system flows back into the source bucket at point 0. This would then have the water pumped from point -10, and the waste water pumped from point -10 back into the NFT pipes at point 1 which then flows back to the source at point 0 and starts the flow all over again and eliminating the wasting of the waste water.......Hypothetically.
Hi Jeff, The energy the system uses is from the potential energy of the source. the longer and farther it falls, the more energy it has. A lot of energy is lost with friction of the water in the pipes and the efficiency of the check valves as well as the efficiency and size of the accumulation chamber. See ruclips.net/user/mekanizmalar for a good explanation of this. You will never be able to recycle all of the waste water due to the Law of conservation of energy. A major source of energy loss in this system is the speed of the check valves closing and their size. See Bohumir Stehlik's youtube channel where he makes some very efficient valves for a ram pump from hardware store parts. Cheers!
Make a closed-loop system that can run continuously. You'd have to capture the water at the ram and cycle it to the delivery or to the input. If you can make one work, then you have achieved what they have been trying to do for years. I'd thought of different methods to do that, but always come back to creating a small volume pump that is powered off the ram pump. I'd like to see someone pull this off. It would revolutionize ram pumps.
I did the math on it, and seems you could almost double your run time, but eventually it will run dry.
If you lift the WHOLE operation off the ground you create another head of pressure between the bath tub and the ground. Perhaps you could use second head to run another ram pump or pelton wheel etc.
i think you were still siphoning
@haz8821 i agree with. Ther must be some siphoning happening, otherwise the lower head pressure should result in less volume
@@Haz-1921 I am thinking the same, cos the deliever head was lowered.
This is awesome. I was wondering the other day actually, if that would work. A basic search brought me here. Nice work, and thanks for taking the time. new sub! Cheers!
I thought that sound reduction would be a benefit of putting the ram pump underwater. But was disappointed that I didn't really hear a difference. Glad you explained that there was a difference in sound volume level.
We’re seeking land along a river for our prototype off-grid Christian Retreat & Events center. With enough river frontage and drop, it looks like this concept would work for us. This is great information. Thank you!
Fun Fun and Fun, I am retired and have some freedom of schedule. Where are you looking to locate your ministry. I have had a vision for something like that for 30 years. God Bless and I hope it is the Lord's will for you guys! I'm in central Virginia.
@@clarencecarter960 we're in Central Arkansas near Searcy. We need to get creative due to the way real-estate prices have increased, especially since 2020. It would be nice to connect with you sometime and share visions. Blessings-Jeff
The pressure of the water in the pond would restrict the output of the waste valve slightly, so that could be the reason why the flow rate was a bit less on the underwater test. However, pressure gauges like the one you have are measuring the difference between the pressure on the system and atmospheric pressure. The gauge being underwater means that there is actually more than atmospheric pressure on the outside of the gauge. It seems to me that this would be the reason why the gauge seems to read less output pressure when it's underwater. Maybe try placing the pressure gauge above the water later on in the output hose?
Great video! Very informative, cheers!
I think if the waste valve is submerge the pressure will increase, it means the lift will be higher. It is the same that you are putting additional weight to the waste valve.
@@maximoincognito4881 This makes sense to me as it relies on the velocity head to force the waste valve closed and then that stored momentum forces the other check valve open. More pressure on the outlet of the waste valve should result in more required velocity to shut it and this result in more volume being forced into the other valve.
I think it runs in the wrong direction, other vid shows the "watertower" first, then the valve, depend of die impuls...
There are a few different configurations for the pump.
The the waste Valve under water is pumping at a slower rate due to the extra resistance and pressure of being under water, it has less cycles per minute. In the Video, the ""out of water"" test started at 5:07, at 5:20 it had 15 cycles, miraculously the underwater test started at 7:07, at 7:20 it had 13 cycles. Additional pressure of being under water slowed down the cycle of the waste Gate, slower cycle, less pressure due too much back pressure escaping.
Seth thanx as always. The differential in hammer side pressure is from submersion. Total head pressure/back pressure if raised will eventually, obviously reach neutral. The volumetrics of your system will obviously have a similar range/ratio of supply dump to lifted water.
Placing the pump in an open storage tank/trough is a great way to capture the waste water for storage like for watering stock before lifting the supply to an elevated tank to provide pressure for sprinklers.
Cows wouldnt let that thing last a day.
@@Seriouslydave certainly not in this configuration but be a little creative.
@@AudaxK9Academy i would pipe the waste outlet to the tank on the other side of the fence it should be the same as running it under water if you dont go too high (same level as top of holding tank same pressure) or a bell/u siphon.
Video just showed, you can store the wasted water but then you reduce your output pressure so you can't pump the water as high. There's no free lunch.
Thanks for this - I'm just discovering the Ram Pump field. Would there be any benefit to putting 2 or 3 ram pumps in series to create a higher pressure pump? Your submersing the pump - say in a river would also add to the head pressure no....or does the added water pressure from doing so just put a back-pressure on the whole system? If one were to trench small deep pit beside the river/creek to drop the pump in - would that be beneficial to creating higher head pressure?
As long as you have check valves between each it will build
As a method of muffling the pump, this is excellent. Further the ‘spray’ is contained and therefore usable elsewhere. 👍
Not really. The video showed it significantly reduced output pressure. To maintain performance of the pump rather put sound insulation around the noisy valve.
I noticed the 1st time you took the pressure reading you turn off the valve on the Y going to pressure gauge before stopping the intake but not the 2nd time.
Yes, I caught that also. I think he was reading the pressure from the elevated water column in the second reading.
Submerge the Ram Pump a little bit is good, as I think the real benefit is the sound that is annoying for other people in the surrounding. Thank you for this exercise, I learned a lot from this. I subscribed to your channel, and will be seeing your other videos as well. Thank you, God bless you, and More power to you. 🙂
This pump is the key to how the Pyramids were built.All ancient structures are located near rivers with headflow.Thanks Seth,hydraulic tools next please powered by a ram.pump.
I have watched that video about the pyramids. Very interesting. There is likely a way to get the ram p ump pressure to work with some tools.
Ours works under water in our spring bed - It makes it VERY quiet. We lift water 300' away and 60' high to a tank for our barn.
Try adding a snorkel on the swing valve to lessen the underwater pressure. By decreasing the the depth of pressure directly applied to the exit you will regain the loses you are seeing, perhaps. Love to see it tested.
The velocity of the water in the drive pipe is directly related to the difference in water level between the source and the water level above the waste valve. As this system is effectively driven by kinetic energy less head difference = less velocity = less energy = less pressure. Also even though you put the pipe up to the top of that tower the work done was actually only the difference in level between the top surface of the source (your bucket) and the level of the end of your hose. Which is why there was not much of a difference in the volume of water pumped.
I am glad to see it will work under water. This could help muffle the sound. Especially if there is a noise of a water fall nearby would be good. A friend was concerned about the noise attracting marauders in the aftermath of an apocalypse. I will be able to tell him about your experiment.
Underwater does seem to help some with the sound. I have a feeling it could also help with freezing in the cold months. . . . I have actually received email from many people in parts of the world who have said they lose ram pumps from theft. The sound is an issue because it draws people in to see what is going on.
@@LandtoHouse Maybe a cammo and insulated box/cover over the pump assembly to obscure, and deaden the sound? Also black pipe or hose?
@@dgbasile this summer I hope to make a pump that is stealth and hidden. An insulated box is a must.
Good idea Paul. I was thinking in that experiment also. A question. Instead of wasting that water that came from the valve, can you connecto a hose a put it back to the basket? Just a idea.
I kmow this video is old, and I looked through alot of your comments. Just wanted to point out that when you were checking pressure. Did you notice that when tub was empty you shut valve off right at the guage first, and when tub was full you shut valve off before check valve. Measuring pressure in air tube as well. That may be readon for drop
These videos are amazing! This is wizardry!!
The delivery pipe was kinked just near to the pressure gauge which I think is why the delivery flow was similar despite the 25% reduced pressure. Interesting demo, thank you.
I'm impressed. You teach I learn. Thank you !!!
Thank you for watching! I have tons of other ram pump videos too!
I was wondering 2 things. 1) having the pump 5 feet deep with a pipe feeding it from say location but 4’ above. Maybe even using a 5” pipe neck down to 4” then 3” the 1 1/2”. 2) whether a cover with air in it covers the input value so there’s no water resistance when it goes off, of course open on the bottom so there’s water comes out.
I guess I should have binge on your channel before asking questions!
If you submerge the pump under one feet of water, then you also reduce the head pressure by one feet. That must lead to a reduced pressure and flow rate. The flow rate might not be reduced so much because the efficiency of the pump was increased due to a longer cycle time. A comment by Steel Arms said that you have 15 cycles in 13 seconds with the non-submerged pump, but only 13 cycles in the same 13 seconds with the submerged pump.So you are closer to the optimal one-cycle-per-second ratio with the submerged pump.
Hii i am from india , i work on ra. Pump project as you say it reduce pressure by one feet and also reduced flow rate . But my question is it reduce incoming flow rate ( water coming from source to pump ) or only reduce lifting flow rate ?
As I understand 24 PSI is due to water pressure above the outlet and changed valve weight under water. If you use a spring outlet instead of gravity weight valve which is also become lighter under water due to its volume amount water is replaced makes lighter which can be tuned by spring valve causing PSI improvement.
Nice experiment, thanks for sharing.
Great Test that tells me it would also be possible to run a Ram Pump from a Watertank Underground. How would the Rampump act if the Inlet and outlet Valves would be farther away from the presurehead and Check valve can you make a test on that? That would be great.
The gauge pressure being lower does not affect the output pressure at the final container. you add the gauge pressure at depth to the water pressure at the depth of the water hammer.
So glad you caught the siphon issue. Makes it an excellent comparison, great job!
Sir. My name is alararic tomambo i wish to buy from you one unit of your ram pump can you include the diagram spicification of all parts my phone no. Is 559 253 3378 I am from Fresno ca 93722 pls. Quote the price of your ram pump including the delivery. Thanks a lot.I need for my farm in the philippines.
He only half caught it. Yeah it took the back pressure to make it work, however, taking that hose up in the eves was still siphoning everything that was above the outlet of the hose. It did show us that there was enough lift to get water all the way up there once, but once some was coming down to the tub, there was still siphoning in the gallons per min formula. It was the same as if he would have just put the outlet of the hose in the tub without bothering with running through the rafters.
makes sense the density of water being much greater than air when level is raised and when you fill tank you effectively reduce the elevation head and thus pressure, what would be interesting to know is (and perhaps you have done this elsewhere) what is the minimum elevation head you need to make your pump function and what configurations make that more efficient, for instance if you used a plastic check valve instead of metal I suspect you sacrifice lifespan, but takes less energy to open and close hence more efficient operation but doesn't last as long.
I'm looking to pump from a creek up 3ft over 30 ft. To a pond is this possible
Hi love the video. Could you put a bell housing over the check valve to stop the water preasure on the check valve?
Was wandering if u put pipe from bottom of pond with a float valve that opens up when the pond gets full and have that feed into the line on the dry side would that creat suction on that side to pull more water threw or would that just blow back into the pond
This wiuld have worked well where I was feeding a fish pond and wanted to irrigate the hillside above the pond.
what if you had it in the bottom of a 10ft rain collection tank. Would the pressure created from being under 10ft of water be enough to feed it?
Can you harvest some of the pressures off the pump it's self without stopping the water flow if so how much?and can you combine this with a troump?
When I start working on my wetland pond and bog filter, I want to try to use a ram pump in the pond, flowing from the bog filter overflow, to the ram pump, and back into the bottom of the bog filter creating a small waterfall feature, and filtering the water. I'm wondering if the ram pump is deeper, say 4 feet underwater, how much more that might effect the flow.
At the end of your supply line, can u shut it off and on and it will still flow, or do u need a constant flow to keep the pump working?
The difference in air pressure compared to water pressure shows the difference in the pressure readings.
The water submersion also cushioned the system so the noise was reduced.
Good stuff.... keep it coming👍🏼. I do agree with the comment to raise psi gauge out of water. 💥And also put extension on the waste valve so it’s discharge is also out of water.
You have the weight of the water in the tank/pond that would put pressure on the outside of the gauge diaphragm and that could cause the gauge to read low, just a thought???
Thanks for your great explanations
If I place a ram pump at the bottom of a 1k gallon tank, would it be able to pump water a couple thousand feet up to around 100ft elevation change, to a higher point on the property to another tank, so it can gravity feed everything below it?
I remember reading in an article a long time ago about WATER HAMMER pumps that mentioned that a larger flow to a higher location a distance away could be obtained by using a vertical loop with the down pipe acting as a siphon working against the drag of water flowing in the pipe uphill to the final use spot. Many people associate the French Montgolfer brothers with hot air balloon fame. They also are reputed to be the inventors of the ram pump using cannon balls and an up sloped pipe as the waste valve. The flowing water would start to flow and push the cannon ball up slope to a smaller outlet, then the water inertia would lift another cannon ball vertically in a larger diameter capped pipe and tee.
Cool stuff! I'm wondering - how can you capture / use the "waste water" so its not....wasted? in a hot dry climate, every drop of water is sacred. wasting water from the pumps waste valve is not an option! can a bucket or "cup" on top of the waste valve be fitted? ie: would the waste water be able to be re-fill back into the pump system since it is positioned before the actual pressure tank? I guess like - water in - waste valve pushes water into "cup" when open- waste water cup refills waste valve when closed - re-entering it back into the system? make sense?
If its underwater it would also prevent freezing in the winter wouldnt it? Or does that even matter because of the water always moving?
Love the tests! I am very interested to see how much more flow or if any you get by submerging the pump 1 or 2 feet into the creek compared to mounting it just out of the water. Do you actually gain more head pressure or does the hydrostatic pressure of the water it's submerged in cancel out any extra head pressure?
Will a ram pump provide enough pressure to force water through a sprinkler or some other way of diffusing the water coming out the end? Also what is stopping you from dropping the water back down into the bucket at the beginning, where it spins a wheel on an alternator along the way, effectively creating endless energy as long as water is in the system? I know there is still the issue of the waste water coming from the top of the pump. My theory is if it can fill that tub without sucking the water back in, then that means your waste valve also has pressure behind it. One could theorize that you could run a pipe straight up from the waste valve, and have it ramp back down to your supply water creating a 99% efficient loop.
Great information ! really interesting .
Could you not make more water return by making multiple pumps on multiple reserviors with each pump using the waist water from the previous pump above , using more energy of waisted water ?
Is it possible to use rubber bushings to minimize the sound of the closing valve?
Under ideal conditions of the water supply you could bury the system and put the pump under water to keep the system from freezing in the winter and run the system year round to water live stock and etc.
Yep.. works here.. Just need to bury 800 feet of delivery line now. :)
That is really good feedback! I have a number of people up in Canada that have very cold weather and could use this info.
I like the idea! Well worth giving a test.
@@LandtoHouse i have done lots of testing here.. other videos as well regarding cold weather: ruclips.net/video/uRxuTOWz1JQ/видео.html
If you put the ram in a dry basin with no supply pipe, if the basin begins to fill, will that be enough pressure to pump it out? Essentially acting as a sump pump
so if you fill your bucket from a river to ram pump it up an embankment to a tank say 100ft above river how often do you gotta fill the 5 gallon bucket at what length of drive line to accomplish this ... i realize just using the river for the pump would increase the yeild/ flow rate but i wanna know for the 2ft high drop of a 5gallon at full fill and do ya got 10 ft of pvc before ram or 20? because that's what i think would need to change to longer to accomplish with bottom of bucket being at river height then you could fill bucket by hand from another 5gallon
just came across your video on ram pump underwater...looks like it works and the delivery almost similar... my question.. is there any effect if the depth of the whole pump unit varies underwater.. good experiment done.. tqvm
Question: can you put a tube in a pond(like half way) and then the pump in the bottom of the pond and the setup works? maybe like that you can keep the water pressure, i don't know just trying here....
(sorry for my english)
I am super curious if you can daisy chain these together and go farther up hill then if you had used just one. Could you test two ram pumps one at the top of the hill directly from the hose and can you test directly from a gravity feed tank that gets feed by a ram pump at the bottom of the hill thanks.
Because gravity essentially applies that forward pressure through the system, I see no reason why more pressure recieving it would interrupt it. However there is a lag in pressure application everytime you her the ram thump. This delay could accumulate to your secondary or tertiary pumps to lose pressure at integral moments, this could mean two things though that it needs so intensely calibrated you better bust out a calculator to make it even possible, or it's a simple calibration. The ram function relies on the gradual increase of pressure to pop open the further valves or pistons. Additionally the pressure created in the further mechanism as it builds may prevent the previous pump from releasing, but this is a sensitivity that can be calibrated out. I think it's doable but more prone to pump stop, which is the problem with these pumps
It makes sense to me that the submerged pump would produce lower pressure since the valve will close slower causing a slight loss in peak ram pressure.
I believe the reason the volume delivered by both situations is similar is because the average pressure generated while the output valve is open is limited by the work being done and both tests did the same work.
In this case it's essentially the difference in height between the pump and the open end of the hose that's being benchmarked. You would see a much greater difference if the output hose were long enough to present a significant resistance or if the height difference was great enough to hold the pump near its maximum output.
P S. Apologies for the necro
Will a ram pump work in a river with the water flowing into it to create pressure or does it still need water from a higher source?
I have a small creek on the property that doesn’t have much current to it. Does current flow determine size of ram pump? Thinking to start with smallest diameter
My observation is that the flowrate and pressure might be a bit lower but the bright side is that it negates the banging noise. Maybe a 1" or 2" submergence of the exhaust valve outlet will work just fine without compromising the overall efficiency.
I am trying to figure out how to get flood water from my yard up to the driveway where it can drain to the streets sewer. My problem is how to divert the "waste" water either back to the flooded area, or somewhere that doesn't create a new flooded area. I could use a tub down in a hole but it would eventually fill and then what? Any suggestions?
Good job and thanks for sharing with us.
Good experiment
Good luck
Is this a condition that the water must come to ram pump in preasure? Can use this ram pump with tank, water come from the bottom of tank to ram pump and water back to up tank?
Hi, my name is Lee. I am a 65 year old lady from South Africa and I am building a 20mm pipe small ram pump which I want to use for my stack hydroponic garden. That means I need to put the wast water back into the feeding bucket.
Must the feeding pipe be so long or can the metre fall be almost diaganal?
If so, can one connect a metre cylinder which is open at the top so that the wast water can push up in it, instead of running away with a pipe from it to the bucket, thus depositing the water back into the system?
I bet it is how deep the ram pump is in the tank. As the water height increases in the so called pond there is more water weight applied to the opening valve. The higher the water rises above the pump the lower the PSI pressure will get until the pump eventually will slow down and stop working. To check this you would have to make the test longer and see if your pressure drops after 30 seconds of time. Such as a whole minute, or longer and see if the pressure drops. I like the idea of an underwater ram pump.
I believe the reason that pressure under the water is less than the one that open to the air is that the valve for the water outlet (waste one) has friction (suction/vacuum effect) by the outside water when it is open/closed.; this reduces velocity for the valve to close or open which reduces the hammer affect that leads to reduce the pressure; whereas the systems open to the air one, the valve can close or open faster than underwater one does; this produces stronger hammer affect, leads to produce stronger pressure (not much but can be significant different in water volume in over long period of time).
One reason to use this set up would be to contain the unused water and gravity pipe it to a lower elevation. I am curious how raising the height of container the pump is in would effect the volume and rise on the pressures end.
Have you tried this pump on a hydroponic system? If so do you have a video or link please. Thanks
are you able to run a continuous small ram pump to cycle water in a 300 gallon fish pond?
Who doesnt love ram pumps. Great video. I cant wait until you test the blader tank with an adjustable pressure. :-)
I have grown rather fond of these ram pumps haha. Yes I need to get the money to buy one of those. Probably going to be next year. I have several thousand $ worth of things ahead of the tank. haha
i am intreagued to know if there can be some kind of set up to have the water recirculating into the pomd for a water feature !?
That's what I intend to do with this, with a duplicate set of ram pumps to increase the flow of a small waterfall, yet capturing all of the water for no waste except for evaporation. That's the hope at least.
Great test Man....but can we make it start automatically without hand start. I don't need to be their when it is raining.It should start by its self & full the tank....any better Idea?..
Good job my friend
Great video. I have a comment and a question. First; I believe you are getting less water from the submerged pump because the head distance has been reduced by the depth of your pool. Question; I am curious to know if the submerged pump is sending a higher percentage of water through the outlet, due to the restriction on the waste valve. Did you happen to check this?
Your plastic tub also is a resonator and even if the pump was isolated the tub is like a drum head. If the tub were in the ground, or the pump in a pond/cistern it would be even more muffled. I am interested in the idea of collecting the water from the initial check valve in some sort of cistern from which one could draw for other uses - gardens, fields etc. good video and helpful info! Your Buddy at wranglestar sent me to you!
That's a good point. The plastic pond is no good for the sound. Underwater in a creek or in this pond underground would be better. ... the waste water can be used to fill another tank as long as it's down hill from the pump. Thanks for watching!
Could you use a ram pump to supply a waterfall in a pond?
having the pump completely submerged would reduce freezing in very cold weather. Depending on how cold, of course. It should withstand frost. Not saying about the pipes, however. It would also accommodate changing water levels in the water source. One wouldn't have to worry if the creek rose like after a big rain. I'm amazed it works underwater! Thanks for the video.
few ideas/questions
is it possible to add some archimedes screw power generators either along the input or output pipes? how effective would it be to harvest power with that? better on one end than the other?
for the “waste valve” would it be possible to make the dumped water flow in reverse towards the input with a valve to seal it. it would most likely be a sloped pipe with a valve at/near where it joins the input pipe. as for accessing the “waste valve” maybe have a rod that sticks out, connected to the center of the valve door. then you can press the rod down to prime it. the rod should “jump” on its own when it cycles normally.
Ok, saw the rig up a little better. Here's a more complete explanation.
First: The pressure gauge measures a differential between the tube pressure and the atmospheric pressure. So when you submerge it, it is reading tubing pressure versus being underwater pressure, which is quite a bit more than the air pressure. Hence, you would see less difference, lower pressure difference, once the pump is underwater, and the reading would immediately read lower.
Second: I'm not sure how the valve works. Does it maintain the static pressure on the output after the piston stroke? Or will it return to zero pressure at the end of the piston down-cycle? Assuming it maintains pressure, you'd have to close the valve and cycle the pump to measure the static pressure potential during the downstroke. By capping the flow off, the pump exerts its full potential force on the water being pumped, and you can take a reading on the setup you have. Here was the problem in the clip... you kept the valve open and piston not moving. So all you read was the pressure due to the water column downstream being elevated.
So not only would you see a decrease due to the "outside" atmosphere being water instead of air, but if you read both readings with the valve open, you would just be comparing a pressure distance due to the pumping location being less elevated in the second case.
Hello, First, a drop from 32 to 26 PSI is 25%. Now the question I have on RAM pumps. I would like to use a RAM pump in a Hydroponicsystem to grow vegs. The pump would be in a pond, on top there will be a growbed. In this setting if you know the water runs back in the pond will it work? Is this setup there is no bucket involved as what you use in this video to supply the pump from water.
You can't compare the two readings... the second one read the pressure of the water column, not the potential pressure the pump can deliver.
Veey good sir, what check valve you were used?
I have a pond at the lowest point on my property. Is there any way to utilize a ram pump to get water up the hill?
Every time I see ram pumps they all share the same design with water that pushes out of the check valves. I understand operations and why it does that. So I wonder if is possible to catch that water and re-cycle it back to the pump, thereby not losing any water.? Got any thoughts.
Because the water coming out of the waste valve is at a lower pressure than the source water it's not possible to return it to the source. You can however let that water run down to another pump and recycle water that way
@@LandtoHouse that was kind of my thought but I suppose there's going to be water loss no matter how many times you go down the line there will be water loss. Well thank you for the video and response.
Hello, very informative video about Pump, in under water there is possibility that, if remove incoming water line from bucket and direct use from lack then it's work or ?
Thank you for watching. Sadly no this does not work. The water source must come from above the location of the pump. Does not work in a lake. Does work well in a creek.
It cannot work without a drive pipe fed from an higher head of water, so the answer is no. The system relies on water pressure and the induced water hammer shockwave from the waste valve and pressure vessel input valve to build internal pressure for the output pipe. This application would seem to show that it is possible to site the pump lower downstream in a watercourse if required or perhaps on a floodplain which became flooded from time to time. It would be possible to have a standpipe system (which is effectively the bucket reservoir in the test set up) so long as it is from the higher head of water.
Yes well said. Thank you.
Land to House Hi Seth, I’m wondering about the feasibility of generating electricity using a ram pump to restock a hydropower reservoir tank (like a water tower, sited higher than the creek) with the outflow from the reservoir flowing back to the drive pipe source (i.e. the creek)? Effectively, you’d have a turbine powered by water falling from the water tower, which is then refilled from the ram pump. It probably wouldn’t be a continuous uninterrupted supply cycle, but with a battery bank, it might be possible to maintain a supply with a discharge/recharge cycle factored in. Any thoughts?
@@LandtoHouse thank you for the information,
The weight of the weather on top if the check valve is a factor the more weight the slower the valve can open
The weight of the water is hydrostatic pressure. As long as the input head pressure is above the tank here it should not matter how low the pump goes in the water.
@@LandtoHouse Mark is correct replacing the air above the waste (check) valve with water reduced the pressure differential by the weight of that water, thus the pump is less efficient by that same amount. Or simply put if you tube the top of the waste valve it will fill until it reaches the source height and stop the pump. In your video it starts with the height of water in the bucket verses the drop in height to the waste check valve but changes to the height of water in the bucket verses the drop in height to the black tub. It is still a great video
Can a ram work off river-flow pressure below grade to pump uphill using flow instead of drop?
This would be a great way to circulate hot water in an under the floor radiant heat system. At least iy would be nice as long as it worked. Orher means could be what I use, a RV water pump running on s solar psnel charged 12v battery.
I built one to help divert my insane amount of sniw pack and rain run off on the mountain here. It does help.
Good work !
Wulfy
I am not sure that the ram pump is going to work well in a floor radiant heat system. It would be way too lossy. As for moving snow and rain run off Yes its great. Thank you for watching.
How can you retrieve the water loss from the waste valve to put it back into the system? If I'm using a 550 gallon tank to operate a hydropower generator .is that possible?
I love Ram because they are cool🎉🎉🎉
Would this work with both the bucket and pump beeing submerged? Lets say the bucket would have an open/close mechanism and the height difference would still be there.
The bucket or closed vessel with the open close meachnism would still be placed higher. But ye, both submerged.
I didn't read ALL the comments, but your reduced pressure and flowrates could also be related to the water pressure (weight) on the top side of the valve you need to close. There's water, (and pressure) making it harder for the internal pressure to close that valve.
Yes ! Good observation. That water pressure is called hydrostatic pressure. It does reduce the head pressure activating the pump. Making the pump less effective.
With that pressure reading, aren't you just reading static pressure from the water column downstream? You would have to make a live reading with it capped off right after the valve... it seems.
I think the pressure was reduced due to the pressure against the wast water coming out the waste valve due to the water head flooding the Ram Pump. But, this acting like counter weight which reduced the time for waste valve to remain open, which reduced the waste water which goes to the container. Right?
you use 1 check valvve only?
Thanks for your great videos. I'm just wondering if the pressure tank has to be long and tubular. Maybe you could test with a more low-profile, but wider container. Same, or even mode air volume, but more compact. Also, is there an option of purchasing a few spares, e.g. valves, with your kit? While one can build their own unit, I like the way yours is standardized. Thanks.