The pump cannot be used
singly; it must be used as boosters combined with a backing pump
such as a rotary piston or a rotary vane vacuum pump, or a liquid
ring vacuum pump. These vacuum systems can get higher vacuum, a
stable, fairly high pumping speed can be gained in effective
pressure range. The backing pump decides the ultimate pressure of
roots pump. The data of the list is lowest ultimate pressure with
the standard equipment (equipped double stage oil machine vacuum
pump). The Roots pumps are widely
used in vacuum moulding,vacuum smelting,vacuum gas pumping,vacuum
coating industry,vacuum distilling and vacuum drying of chemical
and pharmaceutical industry etc.The pump is insensitive to a little
dust.
Merit:
1. The lack of reciprocating parts allows a perfect dynamic
balancing, because the rotors is processed by numerical control
machine tool and balanced carefully. It has perfect geometry
symmetry. There is certain clearance between the two rotors. The
pump house and end-cover is processed by especial machine tool. It
has high precision. So the pump own feature of stable operation,
low noise, low vibration and high ultimate pressure.
2. The robust drive of ump and operating parts balanced carefully
permit that the pump be stably operated continuously under the
condition of high different pressure.?
3.They can be started quickly, and in short time ultimate pressure
is reached
4. Lubrication is unnecessary as there is no contact between
rotors, rotor and house, that avoid oil vapor from polluting vacuum
system.
5. Good reliability characteristic. Their inherent overflow valve
play auto-protective role.
6. Compact structure, low footprint design. There are three gas
outlet ports that are in left, right and under pump house. It is
convenient for consumer installing.
