Deep Well Pumps [RE-wrenches]

[Allan Sindelar]

Ray,
Thank you for your ideas; I am presenting the entire set of postings to the
client, for him to base a decision on. I'm purposely avoiding making a
strong recommendation for one option or another--partly because I don't want
the responsibility, partly because I have no experience with any of these
pumps.

The SunRise was set at 350'. It was a model 5218, good (in theory) to 600'
head, and the lowest rated flow (smallest cam) of the range. Dry run
protection is not by a probe, but by electronic current threshold cutoff
circuitry in the converter.

Allan

----- Original Message -----
From: "Ray Walters" <remotech at taosnm.com>
To: <RE-wrenches at topica.com>
Sent: Wednesday, June 05, 2002 11:16 AM
Subject: Deep Well Pumps [RE-wrenches]


> Hi Allan;
>
> I just discussed your problem well again with Solamotor this morning.
> Regardless of which pump you choose, you definitely need to perform a
> recharge test of this well. Any pump is going to malfunction if it is
> allowed to run dry. Also it will be difficult to design a system and
> predict its efficiency when the pump may begin pumping at a head of 260 ft
> and after a few hours may end up with a head of 450 ft or run dry.
Further,
> the electronic dry run switches often won't work properly, especially if
> the upper perforations are dripping water back on the sensor. It will read
> as if submerged, even though the well is empty. A well test may determine
> this well isn't even worth putting a pump on it. Spending thousands of
> dollars on a well that produces less than a hundred gallons a day doesn't
> make economic sense.
> Its very possible that much of the trouble you experienced before with the
> Sunrise on this well was actually related to the poor recharge rate. Look
> at the chart for the pump you were using and see what the performance was
> at 450 ft. You may have exceeded its max. rated head even before it ran
dry.
>
> Just some thoughts to consider,
>
> Ray
>
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