Reduced maintenance and higher reliability is
saving operator costs
Speck Pumpen have launched an improved design liquid
ring vacuum pump known as the VZ. The pump performance
matches that of its predecessor, the VH but has many
cost saving benefits for the user. Higher reliability
and easier maintenance is achieved through O-ring
sealing and an integrated connecting pipe. Floating
impellers mean that no mechanical adjustment of the
clearances is necessary. Using fewer parts means lower
repair costs and simplified assembly.
One problem most users face in shaft seal replacement is
one of accessibility. In some cases, the whole pump has
to be dismantled in order to replace the shaft seal,
particularly if the pump has been in service for some
time. Speck has overcome this by designing simplified
and easily accessible shaft seal housing, giving easy
access to replacement of the mechanical seal.
The range has also been extended to include space saving
close coupled pumps and including a magnetic drive
variant. The pump performance is interchangeable with
the previous VH range and connecting dimensions
remaining the same.
Reducing failures-saving costs in
the plastics industry
 Specially designed vacuum pumps from Speck Pumpen have
eliminated failures due to excess water carry-over at a
leading plastics extrusion company. It is claimed that
this newly patented design can handle up to five times
the amount of entrained water than that handled by
conventional liquid ring vacuum pumps in similar
applications.
Ian Whiteley of ABC Pumps Sales & Services, Crewe,
distributors for Speck Pumpen in the UK, says a number
of manufacturers in the plastic extrusion industry have
been able to replace both the vacuum pump and the liquid
extraction pump with a single new VN pump, thus saving
power consumption and improving reliability.
Until now, it was common to use a combination of two
pumps; a vacuum pump to maintain the extrusion profile
and a water pump to extract the cooling water. Often,
excess water would enter the vacuum pump causing power
overload cutting out the motor or worse, damage to the
vacuum pump impeller. Machine downtime, loss of
production or pump replacement was often the
consequence.
The new VN pump design incorporates a cylindrical
suction port with a variable flap valve which adjusts
the port size in proportion to cater for the amount of
extra water entering through the suction connection. The
excess water is then passed through the pump in a direct
smooth path enabling the same size motor to be fitted,
being comparable in size to similar capacity single
stage mono-block liquid ring pumps.
For further information
Speck Pumpen - ABC Limited
AreenA House
Moston Road
Sandbach
CW11 3HL
Tel: 01270 753606
Fax: 01270 764429
Email:
ian@speck-abc.com
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