mechanical:carbon
vanes
Vane
pumps can be used in gaseous applications either as compressors
or vacuum pumps, or in liquids. The common range of applications
is for pressures up to 2 bar, (although this can be extended
to 3 bar, by using more specialised materials), and down
to 0.1mm Hg for vacuum pumps. Peripheral speeds up to
12.5 metres/sec can be experienced, but the higher speeds
again require high performance materials, pumps handling
liquids are normally used in transfer or metering applications
and working pressures are lower although the volumetric
throughput may be higher.
|
 |
 |
The use of impregnated carbon or resin bonded carbon vane material
has enabled designers to produce pumps that will operate without
lubrication. In certain cases it is necessary to fit carbon
end plates to prevent contact between the rotor and the metal
end plate. This also permits the pump to be constructed with
a smaller end float on the rotor than could normally be envisaged
which may result in gains in operating efficiency.
Material Features:
High mechanical strength, transverse, compressive and impact.
Good lubricity, capable of operating in non-lubricated situations,
even in vacuum.
Low coefficient of thermal expansion (ideally matching that
of the rotor).
Resistance to attack by liquids being handled, and chemically
inert and non-toxic.
Good wear resistance.
> For information on products which aren't available through our online catalogue, please contact us
|
|
