Cutaway of a magnetic
drive pump that shows the
nonmetallic containment shell.
Perfected
Sealless Pumps
Additionally, the secondary containment shell is subject to the
same induction heating as the primary containment shell, so
a common failure mode is present even with the secondary
shell. Using the magnetic drive housing for either secondary
containment or control requires the use of a leakage restriction
device or a mechanical seal. In this situation, the pump acts
as a hybrid tandem sealed pump, with the primary seal being
the single containment shell of a magnet drive pump. This
arrangement has the advantage of separating the primary
and secondary sealing devices such that the initial failure
mechanism that caused the primary device to fail does not
negatively impact the integrity of the secondary device, in this
case the secondary seal. A further benefit of this arrangement
is that it allows the use of a nonmetallic containment shell or a
thicker and more robust metallic containment shell.
These new technologies are significantly improving the
reliability of sealless pumps. The elimination of seal support
systems and higher reliability of the magnetic drive pump
components over sealed pumps make sealless pumps a
compelling alternative choice for process engineers. As
environmental safety and the safety of personnel come under
increased scrutiny, sealless pumps should be considered
as a favourable option to reduce the high operating costs
associated with emissions monitoring and seal support
systems.
David Clark is the General Manager of HMD Kontro Sealless
Pumps. David is a Chartered Engineer and a serving member
on API and ASME Committees, including API 685 and ASME
B73.3. He has implemented numerous sealless product
developments, including high pressure pumps, API vertical
pumps, ZeroLoss™ Composite shells and the VapourView®
condition monitoring device.
Continuous innovation means
HMD Kontro magnetic drive
technology is now even more robust,
reliable, economic and suited to
even more applications
ZeroLoss™ Composite
containment shell / shroud that
significantly reduces power
requirements meaning smaller
motor sizes and less energy
consumption.
VapourView™ Non-intrusive
instrumentation that uses
ultrasonics to detect the
presence of gas in a liquid from
outside the confines of the pump.
Secondary Containment
Options to enhance even further
the environmental, health &
safety attributes of sealless
pumps.
With new derivatives including
vertical, high-pressure,
low-flow, multi-stage,
even extended
sump versions,
there is a
HMD Kontro
sealless pump
that is perfect
for your next
project.
Enquire today.
Magnetic drive pumps with nonmetallic containment
shells are available to comply with API 685
specification.
+44 (0)1323 452141
[email protected]
www.hmdkontro.com
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