keene and proline pump psi ??

[diggerdoodah]

Does anyone know keene and prolines pumps actual psi ?
not the gpm can find that every where but can't find the actual psi of any of the pumps.
It would be nice to know to compare and search for other pump with similar psi and gph.


I found a good deal on a honda pump https://powerequipment.honda.com/pumps/models/wh20

spec say max pressure 64 psi. yes gpm is only 119 so i can only figure maybe a 2 1/5 dredge with good suction?

 

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[arizau]

Not really an answer to your question but I found this quote for you: " Most all centrifugal pumps (2hp and smaller) top out around 37 - 42psi. Jet pumps run higher pressure, but less volume."

 

[Hoser John]

go to keene website

 

[diggerdoodah]

Hoser John i have been to the keene site they do not list PSI . They list GPM and MAX HEAD LIFT for their pumps . Unless they have some hidden page that I cant find . Let alone they have almost nothing for specs.

 

[akflyer]

Most dredge pumps are around 90 PSI. If you can get the honda real cheap you can put the northstar pump on it for 169 bucks and you will have a 2" 90+ psi pump.

 

[diggerdoodah]

Thanks akflyer

 

[Beav]

Another trick to give you a rough PSI rating (if one is not given), is to find the MAX DISCHARGE HEAD. Once you have that you can get a rough
PSI rating using the following formula: MDH (max discharge head in feet) divided by 2.309 = PSI
So if you have a pump that is capable of MDH of 150ft, then your PSI rating would be around = 150/2.309= 64.96 PSI
Here is a link that shows this, only going the other way (MDH to PSI): https://www.engineeringtoolbox.com/pump-head-pressure-d_663.html
All Science!!!

Beav

 

[diggerdoodah]

Another trick to give you a rough PSI rating (if one is not given), is to find the MAX DISCHARGE HEAD. Once you have that you can get a rough
PSI rating using the following formula: MDH (max discharge head in feet) divided by 2.309 = PSI
So if you have a pump that is capable of MDH of 150ft, then your PSI rating would be around = 150/2.309= 64.96 PSI
Here is a link that shows this, only going the other way (MDH to PSI): https://www.engineeringtoolbox.com/pump-head-pressure-d_663.html
All Science!!!

Beav

Thanks Beav

 

[Beav]

My pleasure. That's what the forum is all about - sharing info!
Rock on!
Beav

 

[jsurddy]

I second what Beav said. Use the total head to calculate the psi.

 

[winners58]

Posting from Keene Eng. Facebook 7/24/18

18 hrs ·
Keene Engineering, Inc.
18 hrs ·

If you want to build your own dredge there are a few things you should know.

Pumps 101
In order to make a dredge work properly, you need a high-performance pump with a good balance of both pressure and volume.

So let's get some of the basics out of the way so you can understand the fundamentals on pumps. Typically pump manufactures will rate their pumps in several different ways
Max PSI. This stands for pounds per square inch.
Max Head lift. This how high the pump can lift water above the pump. Example if you take a P180 pump with a 150-foot head you could attach a 150 foot of 2” hose and lift water 150 feet straight above the pump.
You can calculate head lift with the PSI. Take the PSI of the pump and multiply x 2.31
Example, If a pump has a psi of 65 x 2.3 = 150-foot head
You can calculate PSI with head lift. The head lift and divided by 2.31
Example, If a pump has a head lift of 150 you can divide by 2.31 = 65 psi.
When using a dredge you will have 2 types of suction devices, a suction nozzle or a power jet. A suction nozzle only works with higher pressure pumps. We recommend a minimum of 140-foot head lift for a suction nozzle. A power jet can run at a slightly lower at a 130-foot head however it does require higher volumes.

Direct Mount Pump and Pedestal Pumps
In the world of small dredge pumps, there are 2 types, we use direct mount pump and a pedestal pump.
The more popular is the direct mount pump it simply bolts directly to an engine and does not require any couplings or bearings. Direct pumps are lighter, more compact, and extremely reliable and perform better.
The pedestal pumps can be driven with a belt drive or a Lovejoy type shaft connector. Pedestal pumps can also be problematic due to a coupler and bearing failures. Pedestal pump is also not as efficient due to higher friction loss factors in belts and bearing. The worst issue is they are much heavier and bulkier due to the larger base plates and all the hardware belts, pulleys, coupler etc. The only time we use a pedestal pump is on our larger 8” dredge when you have to use a diesel engine. The larger pumps can to spin up to 4000 RPMs and the diesel engine like to turn around 1800 RPM so you have to run a speed increase on the pumps. We place the large pulley on the engine and small pulley on the pump shaft.

Keene pump
Typical Keene pumps run around the 150-foot head foot range or max out around 65 psi. Keene pumps are built to perform, we use a closed face impeller with tight tolerances. Our pumps are made from a heat treated aluminum alloy for long life. The impellers are sized to match particular horsepower for optimum performance. Housings are designed with a snail-like a shape for maximum performance. Everything is designed for all-out performance. Our pumps are much lighter, more compact and perform far better than any other type pumps on the market. Our pumps are specifically designed to accommodate a pulley between the back plate and the engine. We also offer great customer support we stock all the parts and keep your downtime to a minimum.
These are just a few examples of working pressures on a few different dredges.
2” dredge pump specifications. The P90G pump produces up to 100 GPM and up to 160-foot head.
2”suction nozzle works at 45 GPM at 35 psi.
2” suction power jet runs at 63 GPM at 30 psi
2.5” dredge pump specifications. PHP160 pump produces up to 200 GPM and up to 160-foot head.
2.5” suction nozzle works at 78 GPM at 45 psi.
2.5” power jet works at 106 GPM at 40 psi.
3” and 4” dredge pump specifications. P180 pump produces up to 250 GPM and up to 160-foot head.
3” and 4” suction nozzle works at 106 GPM at 45 psi
3” and 4” power jet runs at 180 GPM at 35 psi
These are rating that are dependent on sufficient RPMs and horsepower.

Semi-Trash and Trash Pumps
Many of our customers make the mistake of buying the most cost-effective pump they can find so they end up purchasing chines` Semi-trash pump or trash pump. Semi-trash pumps are typically used to pump clear or slightly muddy and sandy water. Trash pumps are made to handle debris and solids such as leaves, pebbles etc. However with ether pump, if you pump any serious amount of slurry they only last a day or so. From a performance standpoint, the trash type pumps have an open face impeller sloppy tolerances and very poor housing design. The volume of the pump is fair however the maximum PSI is typically very low. Only around 35 psi or 85-foot head. Good luck trying to find spare parts for these pumps or customer service. There is no way to add on a compressor. Do not waste your money.

12 Volt Pumps
12-volt pumps have an extremely low head left around 5 to 10-foot head lift and under 5 psi. So it is very important that we keep the high banker at water level and you cannot use a spray bar. Spray bars will restrict the pump to much and you will reduce the water flow by 80%. We use a flood type header minimizing any back pressure and provides a smooth even flow of water. So the only way to make a 12volt pump work with a high banker is if the machine is at water level. Use large short hoses to reduce friction loss Use a flood header to provide minimum friction loss and optimum water dispersion.

Keene Gravel pumps
This is a very specialized pump, designed to pump and gravel and rocks over long distances. These are very different from other pumps they can pass large spheres through the pump, 4” can pass a 3.5” sphere, 6” can pass a 5.5” sphere and an 8” pump can pass up to a 7” sphere. Gravel pumps have the capability to pump an extremely high percentage of slurry exceeding 30% material, the concentration of slurry pumps less water and more material. The pump alone weights range is from 500 pounds to 2000 pounds and requires from 60 to 300 horsepower. Typically used for dredging out lakes, ponds, marinas waterways etc. Gravel pumps such as 4” can pump up to 50 yards per hour, exceed 1500 foot in distance, lift material 50 foot above the water.

12 Volt Pumps
12-volt pumps have extremely low head lift around 5 to 10 foot head lift and under 5 psi. So it is very important that we keep the high banker at water level and you cannot use a spray bar. Spray bars will restrict the pump to much and will reduce the water flow by 80%. We use a flood type header minimizing any back pressure and provides a smooth even flow of water. So the only way to make a 12volt pump work with a high banker is if the machine is at water level. Use large short hoses to reduce friction loss Use a flood header to provide minimum friction loss and optimum water dispersion.

If you want to build a dredge buy a Keene pump.
We understand that many people are on a budget and cannot always afford a premium engine like a Honda or a Briggs and Stratton Vanguard. So we have come up with a versatile line of pumps that can work with a variety of engine and shaft configurations.
Regardless of your engine Keene probably has a pump to fit your needs.
We make a line of pumps designed for a direct drive for both Threaded Shafts and Key Way shaft.

Keene now builds pumps that will fit on a 5/8th threaded shaft and a 3/4” keyed shaft for the 4-7 H.P. configurations.

We also make our larger pumps that will accommodate a 1” threaded shaft and 1” keyway shaft from 8” to 23 Hp. motors. The cheaper engine is ok for the miner that does not use his dredge/ high banker more than a few weeks a year. If you are a serious miner spend the money and get an engine that will last for years of hard use.

 

[Beav]

I think that's the most informative post I have seen Keene make on Facebook in a long, long time.
Interesting to note that the formula I gave in a previous post (PSI from Max Discharge Head) was re-iterated by Keene as well.
Beav

 

[okbasspro]

I love my Proline HP400

 

[Beav]

Okbasspro - I have 2, HP400's that I got some years back from 49erMike, with the impeller modified for a keyed shaft. They are a sweet, high performance pump, that is for SURE!
Beav

 

[Darth Placer]

I third that.. I have a HP400 direct mounted to a 212cc Predator. Runs my 4" dredge and a 2" blaster nozzle at the same time.... great pump.