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I'm not sure. There are sound level testing standards for air compressors and I assume they are used here too, but I cannot confirm this. See below: Measured according to PNEUROP PN8NTC2.2 test code (ISO 9614.2 Sound Intensity scanning method) The emission sound pressure level refers to free...

Forgot to mention...noise for these units are about 72 dba.

Quiet Roots type lobe blowers are an oxymoron. I would consider a rotary screw type blower, like this: http://www.efficiencyblowers.com/efficiencyblowersus/

Thanks for the input jadow. I am also looking at Haskell gas amplifiers. Their engineers were confident at first...haven't heard back from them since. Do you have any rotary screw or turbo-axial compressor vendors that you would recommend?

Hey guys, I was hoping to get some direction on a unique gas compression application. I need a compressor (small at first for research pilot plant) to compress a mixture of gases about 50 PSI with an inlet pressure of either 100 PSIG or 250 PSIG. The final design will be a constant inlet...

It sounds like you may be buying an air compressor. If so: Yes. Compressors are rated at a Flow and a Pressure. Yes they will deliver higher flows with lower discharge pressures. How much more depends on the design and or type of compressor. I prefer to preface flow units with FAD (Free...

As someone mentioned before, nearly every time I have had a wear issue in a diaphragm pump it was because the pumps were too small and run too fast. Before I looked at exotic materials I would buy a larger pump and slow it down, the same thing you would probably due with a centrifugal pump. I...

Thanks for the responses. I did check with the supplier and they recommended Hastelloy C. This holds up but not very long. I will take Yitbos advice and try kal-rez with an all Teflon AODP. Thank you both for your advice.

I need to apologize up front but I cannot get the search function to work on this site. I just get a blank screen. I am looking for suitable materials for pumping triflic acid. I cannot find this acid in any chemical compatibility charts. Specifically, I want to know if EPDM is an acceptable...

I am not certain if this is the appropriate forum to ask this question so I apologize in advance to the moderators if that is the case.... If you were teaching a six hour basic centrifugal pump/hydrualics course to a group of consulting mechanical engineers and plant engineers, what would you...

Sorry Artisi. Again I was hoping someone had tackled this before and we wouldn't have to think our way through this. But you're correct, you need more info. Basically the hair is winding around and locking the rotor. It finds its way behind the impeller and winds around the shaft. It also has...

This is a sump pump application at a large horse hospital outside Baltimore MD. They are currently using grinder pumps. It's hard to estimate a maximum consistency, but I would guess after seeing the area that it could get as high as 25% hair. The current system (two pumps in parallel) is...

Does anyone have experience pumping long hair with a centrifugal pump? I suspect a macerator or grinder pump is needed but I am still skeptical that this will work. Seems to me that anything which happens to be rotating will fail. Flow is 7000 GPD with 30' of discharge head.

What is the water temp and how long is the run? Reading your description it sounds like the suction of the boiler feed would be under pressure at start up, since the condensate pump is running on the min flow recirc. I don't think I understand your concern. I don't think it will hurt the boiler...

Cavitation is caused when NPSHr < NPSHa. Since a short pipe run minimizes losses in the suction line NPSHa is greater, relatively speaking and assuming all other variables are constant. Do you mean a short 'straight' run? Or just short run?

I am pretty certain this has been discussed in detail. I would do a search.

Hopefully the bigger 18.5 kW motor didn't fritz because it was undersized...

To answer the question, changing the HP of the electric motor driving the pump has no effect whatsoever on the pump's operating point, unless the RPM's also change.

I am lifting a 100 lb block by applying 200 lbs of force. The lift takes 10 seconds. No pulleys are involved. How long will the lift take if I reduce the force applied to 50 lbs?

Molten, thanks for the advice. I just realized that I misled you earlier. This is not a cellulostic ethanol application. The nail on the head comment referred to the "There are patented and proprietary/trade secret devices to do this job. And they're not simple progressive cavity pumps..."...