What kind of pump is this? from Sundyne

[ports394]

I've got an application where i need 400 psi, at 40-80 GPM. The fluid is water.

I've been looking at some pumps to meet this.. Using a moyno style progressive cavity/pd, I can do it for $35,000 at 15hp.

A regular centrifugal in a 2 pump arrangement probably a 10 hp feeding, a 75 hp pump. No price for that arrangement, atm.

And I've been quoted this sundyne pump.. which is new to me, it says it's a centrifugal design, but the casing is tiny. It has a 4in impellar.

http://www.sundyne.com/cda/ind/pr/0,10515,CLI1_DIV92_ETI9140_IMD2_MDI104,00.html

Is anyone else familiar with these?

 

[BigInch]

Super-high speed.

"The top of the organisation doesn't listen sufficiently to what the bottom is saying." Tony Hayward X-CEO BP
"Being GREEN isn't easy." Kermit

http://www.youtube.com/watch?v=hpiIWMWWVco

http://virtualpipeline.spaces.live.com

 

[ports394]

BigInch, good catch. I missed the RPM rating. Normally my pumps at 300-3500 rpm. The output rpm in the quote is 10970!

Any experience with the quality of these?

 

[BigInch]

No, but the speed puts me off. Gear driven.. super high speed. Gears could be a maintenance issue and, if something does go wrong with one, I'd think you probably won't find many of the pieces in the same building.

"The top of the organisation doesn't listen sufficiently to what the bottom is saying." Tony Hayward X-CEO BP
"Being GREEN isn't easy." Kermit

http://www.youtube.com/watch?v=hpiIWMWWVco

http://virtualpipeline.spaces.live.com

 

[SteveWag]

40 to 80 GPM is a pretty wide range at 400PSI (925 feet). 80 at 400 can be done with an APCO-CHEM CT-993, 50-60 HP at 3500 RPM. 40 at 400 would be a CT-922, 25 HP, 3500 RPM. Both are regenerative turbines.
Steve

 

[ports394]

Surprised you didn't ask what I'm feeding. It's an RO water filtration system in a pilot plant.

I don't care for the high rpm, but I've had good experiences with gear pumps in distillation.

My other choices are a $35k, 9 foot long Moyno.. 2 centrigugal pumps (approx 90 hp) together and probably $25-30k, or this gear pump for $14k. It's worth the attempt for being the cheapest option.

I'm exploring some rental options to see if this is available as a rental to test out.

 

[ports394]

What's the difference between a sanitary and non-sanitary pump?

 

[micalbrch]

I know Sundyne as good quality and reliable pumps but I know this brand from slurry applications.

For 35 k$ or cheaper you get a triplex plunger pump incl. all accessories. Easy job as it is just clean water and there are plenty of suppliers out there.

A sanitary pump fulfills hygenic standards.

 

[JJPellin]

We have a number of this type of Sundyne pump. Most of ours are in high pressure wash water services (sour water). A few of them are very reliable if they are operated very close to BEP. Others are nothing but trouble. The problems are not what you might think. The gears and bearings tend to be pretty good. But, the seal chamber is tiny and can only accommodate a Sundyne seal. This prevents the use of a true cartridge. Seal reliability at that speed in water service is the problem. The only way you could achieve that wide flow range with that pump would be to include a minimum flow spill-back capable of holding the total flow of the pump very close to BEP.

For your pump selection question, you should consider asking it in a forum devoted to water treatment. We have 6 or 7 reverse osmosis systems to purify our boiler feed water. All of them use long skinny multistage pumps made by Tonkaflo (not sure of the spelling). These pump can have a dozen or more stages to achieve this pressure. We used to use plastic impellers but have converted most of them to stainless steel. They tend to run well if they are installed well. They do not tolerate pipe strain. In terms of up-front cost and reliability I would much prefer the Tonkaflo option over Sundyne. The Tonkaflo pumps are very labor intensive to repair since they have so many stages. So, we don’t repair them in-house. We stock full spare pumps in the warehouse and send them to the OEM approved repair shop for return to stock.

We use plunger pumps and progressive cavity pumps in other service. Neither of these seems like a good fit for RO. I have no experience with regenerative turbine pumps. You should also consider contacting a manufacturer that packages RO skids since they will tend to select a pump with lower installed cost but decent reliability.


Johnny Pellin

 

[ports394]

The Progressive cavity style seems to be fine for a clean liquid for constant flow/pressure. That's what Moyno's app engineers have said so far. They say they have a number of skids out there with their pumps on them.

Thanks for reminding me about the Tonkaflo.. I couldn't remember their name, but I knew they made something similar to the moyno.

All the pumps I've been working with for the last 3 years have been sanitary, since I work around foods/pharmaceuticals. Everything has to be capable of CIP. So I wasn't sure what I was losing with non-sanitary. Thanks.

The hitch here is that I'm pumping ethanol. While similar to water in most ways, it is less viscous.

For a membrane application, the plunger style I don't think would work. We can't have pulsating flow. It's not good for the membrane, or the product. (Can't discuss more)

I didn't think 40-80 GPM was that wide of a flow, but at that pressure... it's a huge difference on the curves. 40 gpm is 2 modules in series, 80 gpm is 2 modules in parallel.

I've got a few calls out for rentals.. I might end up renting a pump, and buying some parts for it to help meet the need. I'm very hesitant to spend $35k on a pump, for a specialized application, that will have intermittent use in a pilot plant for the next 3 months.

ports