Solids Handling Mag Drive Pump

The CHEMQUIP MNK-X/XB & SCK-X - VORTEX design
Conveyance of solids-containing and gas-laden media.

Vortex pumps are preferably used for media
with a heavier solids content. In addition, they
have relatively good gas/liquid pumping
capabilities.

Features
Media with
!Solids contents of up to roughly 50%
by volume, depending on grain size
and properties.
!Particle sizes of about 1 to 2 mm,
depending on the pump size.
!Long-fibre constituents
!Gas contents of up to 5% by volume
are conveyed gently for pump and
medium.
Reliable magnetic drive or mechanical
seal versions.
Gentle conveyance of media with
fibrous or crystalline constituents.
Vortex pumps as mixers, due to the
strong circulation currents, the liquids to
be conveyed are intimately mixed inside
the pump and then discharged. Thus a
mixer may be dispensed with.
Favourable cavitation behaviour,
although cavitation occurs somewhat
earlier than in a standard centrifugal
pump, the cavitation curves become
much flatter. The pump therefore
maintains delivery at a slightly reduced
head for longer than a comparable
standard centrifugal pump. No
cavitation damage is to be expected as
cavitation occurs in the liquid-filled free
space of the housing.

Solids-containing media
The large free space in the housing and the semiopen
radial bladed impeller with the star-shaped
vanes are the decisive factors for these conveying
properties. Vortex pumps do not show any
tendency to clog or experience increased wear.
If the solids content >2% by volume, flushing of
the can chamber must be considered for magdrive
pumps using a special plain bearing with
filtered pump liquid or external flushing medium.
Gas-laden media
Standard centrifugal pumps can convey liquids
with a gas content of up to 3% by volume, above
which delivery fails and is not resumed without
the pump being shutdown.
By contrast the Chemquip vortex pumps can
handle process fluids with gas contents of up to
5% by volume (at a minimum flow rate of about
20% Q ). optimum