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Try looking at Gardner Denver Water Jetting Systems.

Use different jet nozzles (orifice diameters)for each application. Most high pressure water jet lances have the option of rotating nozzles specifically for this purpose.

If you have a VFD, why not operate the pumps at a higher speed when the tanks are full and then slow down to meet reducing NPSH availability as the tanks empty?

Try this company www.kawa-pump.co.jp They may have sales outside Japan.

25 gpm at 200 psi is difficult for a reliable pump on sandy crude oil. Continuous or intermittent duty? You might try a rubber lined gear pump like Bowie Pumps, but the 200 psi may be too high for them. Worth a phone call though.

Re: syphoning. With such large pipe sizes you would need a valve on each end to prime the pipe. Such large valves would open too slowly to prevent loosing the prime. You would need instant opening of both valves simultaneously. This is why I suggested using explosives. This would also be...

What about using a syphon pipe. Two x 60 inch should do it. Each end could capped with thin steel plate and primed with a diesel driven pump. Explosive charges could be used to open both pipe ends at the same time (assuming no fish in the lake). Just a wild suggestion.

In this type of application suction pipe velocities are usually low and cavitation happens before vortexing. Get the Viking guy to calculate NPSH available/required. You may need a bigger diameter suction pipe.

Viking guy is wrong to say one full pipe diameter gap. Your calculation for area equivalence is correct. This usually results in a gap of about 1/3 pipe diameter. What is intake velocity into suction pipe? If pump flow only reduces when tank gets close to empty then this might be your...

To help visualize this problem, what ballpark flow rates are we discussing here? How is the slurry flow rate fixed? Is the slurry abrasive?

What about Ferrari S.p.A.? I think they make some quite good petrol engines.

Please give new issued patent number on projected nose plug. Without reading the patent how can we possibly comment?

Just a wild thought here, we have never actually tried this. What about cutting new key ways through the impeller hubs of the last 4 stages. This would allow you to progressively rotate/offset slightly these impellers on the shaft so that the blade passing does not occur all at the same time for...

To be legally able to sell a fuel additive at the retail/wholesale level all you need is EPA registration. This is a relatively simple, no cost procedure. Provided anticipated sales are less than $30 million per year, no testing would be required. Beware, product claims could come under the...

The Lubrizol Corporation recently tried to introduce an environmentally friendly diesel fuel called “PuriNOx” into California. If you Google the word “PuriNOx” and look at all the hits you should get a flavor of the regulatory nightmare involved in getting a new fuel technology into widespread...

Fuel additives effect on fuel economy and exhaust emissions generally use the following legally acceptable testing protocols: Light-Duty Vehicle Federal Test Procedure-75 (FTP-75) 40 CFR Part 86, Subpart B (Gasoline and Diesel fueled) Heavy-Duty Diesel Engine Federal Test Procedure (FTP heavy...

Unfortunately, the fox is in charge of the chicken house. All major industrial fuel additive suppliers are naturally beholden to the large oil companies. No new technology will enter this market place unless exhaustive testing protocols have been completed. These are so expensive and time...

You can test at 53% of duty conditions and calculate flow and head quite accurately. However, I would not trust the efficiency to be exactly the same. How much margin of error do you have?

The Infineum product you refer to is their marine fuel additive F7450. This product removes and controls the build up of valve deposits and lacquer on the cylinder liners. The fuel saving (about 5% in the test) was an "unexpected benefit". If this is true, they probably have no idea how it works.

I have just found this interesting thread. Finding out flow rates in different sections of pipe having different lengths and different diameters and fed from the same source is a common hydraulic problem. To read this thread would make you think the solution would be impossibly complex...