Ranger9913
Well-Known Member
Just got my hardware today and I hope to put this through some water tests tomorrow.
Looks remarkably like a little giant design, interesting....
When you say "quite some time" are we talking 1-2 years or 2-3 years?
Unfortunately all my fittings are 1/2" on my system so I don't think it would make much sense using a 1" hose would it?
There's a dude on ebay with fairly cheap 10' lengths of 3/4" 1.25"OD silicone hose.
Personally, I see it as a design flaw. The inlet size should only hinder or better the flow rate, not dramatically shorten the lifespan of internal components.
Where where where!?!?!?
I have been looking for ages and found nothing to this point.
Walter, any idea why running at 25% output would make it squeal?
I sure hope so unless they are paying me to sit here and sound like i know what i'm doing on the phone!I'm sure you are correct, but, I've seen high capacity pumps get into a cav situation when severely choked at exit (they start to lose prime). If you don't think that's going on here, well, you know the design better than I.
All of my danner, iwaki, panworld, and reeflo magdrive pumps can be throttled down to zero on the outlet side with no issues.
Are you sure it is the pump squeling. At 25%open (I'm guesing this is with the ball valve turned 22.5 degrees?) the actual opening in the valve is very small and this is where I would be expecting the squel to be coming from, not the pump.Walter, any idea why running at 25% output would make it squeal?
All of my danner, iwaki, panworld, and reeflo magdrive pumps can be throttled down to zero on the outlet side with no issues.
Are you sure it is the pump squeling. At 25%open (I'm guesing this is with the ball valve turned 22.5 degrees?) the actual opening in the valve is very small and this is where I would be expecting the squel to be coming from, not the pump.
I was always under the impression that you should not throttle even a magdrive to zero, they require some minimal flow. I always put it down to "lubricating" and removal of heat from the pump body.
Thats what I have been schooled on, big industrial pumps. Working for a chemical company so all the pumps a mag drive. Only a few months ago I saw the results from dead heading a pump with PVC piping, the thing had balloned out about 3-4 times in diameter, lucky someone noticed before it burst!The bigger pumps we do have min flow rates for....but those are the ones that have flow rates of 50gpm+
Our biggest pump that does 210gpm we recommend a min flow rate of 15gpm to keep it happy.
-Walter
All of my danner, iwaki, panworld, and reeflo magdrive pumps can be throttled down to zero on the outlet side with no issues.
Where where where!?!?!?
I have been looking for ages and found nothing to this point.
It wouldnt be cavitation if he is throttling on the outlet side. I honestly have never heard our pumps make noise when throttled back...most times its the other way around....they start MAKING noise if you dont have enough available liquid coming into the pump and quiet down when you choke them.
The 1" inlet hose is "required" to get the full rated flow out of the the pump. If you cant get a 1" inlet then you would need to choke the outlet to "balance" the pump.
If you want to send me back the pump i can run it through our torture chamber here and see whats going on.
-Walter
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