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Magnatex Solids Handling Pump0 pages
Metallic Sealless Magnet Drive
Pumps Handle Solids
Magnatex has the answer!
Can mag‐drive pumps handle this pumpage?
Many users of standard sealed, process pumps become frustrated
with the high cost of frequent seal replacement and downtime when
handling solids. A suitable flushing arrangement might help a sealed
pump, but the advantages of sealless pumps are now available for
many of these applications!
Rear casing with anti‐vortex baffles
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Like the faces of seals in a sealed pump, sealless pump sleeve bear‐
ings and thrust rings are lubricated with the process fluid. Magnatex
has developed provisions to allow solids pumping, making the total
cost of mag‐drive pump ownership lower than sealed pumps.
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Magnatex’s metallic, standard design pumps are typically limited to
1% by weight of 500 micron solids or up to 4% of 100 micron parti‐
cles. The simplest way to limit larger solids and higher concentra‐
tions is to use a 40 mesh strainer on the suction. Unfortunately, this
can result in the strainer plugging, which can result in "starving" the
pump suction and subsequent failure of the pump.
What happens if higher concentrations of solids go through a mag‐
drive pump? If solids percentage or size exceeds our recommended
values, provisions must be made to allow use of our pumps because:
1. Solids laden pumpage is not a good lubricant and can foul bear‐
ing flutes, resulting in inadequate bearing flush
2. Solids can also become caught in vortices that form near the
bottom of rear casings, acting like a small machine tool, ulti‐
mately resulting in a containment breach (see photo below).
Rear casing breach caused
by solids‐laden vortices
Phone: 713-972-8666
inquiries@magnatexpumps.com
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Magnatex utilizes a "Baffle‐plated," anti‐vortex rear casing that
breaks up solid laden vortices, that can lead to a rear casing breach;
this option is available with our MPL/MML/MPH and MAXP/MAXC
product lines
Either self‐cleaning strainers or cyclone separators can be mounted
in the discharge line with a side stream of clean liquid product flush
introduced to a port in the rear casing. With this configuration the
internal flush ports are plugged to keep solids out of the rear casing.
This option is available with the MAXP/MAXC series of pumps. This
system will not disrupt the process as there is no product dilu‐
tion and solids simply continue down the discharge pipe in the
same concentrations as they entered the pump
Another option in conjunction with plugging of the internal flush
ports is to introduce a clean, compatible liquid to the rear casing,
but care must be taken to avoid product dilution that could up‐
set the process
Installation with self‐cleaning strainer on discharge which pro‐
vides clean liquid to the rear casing ceramic bearings system
Copyright 2009 Magnatex Pumps, Inc.
SHF‐M REV 7 081710
Fax: 713-972-8665
www.magnatexpumps.com
