Screw Type Dry vacuum pump
Water sealed V/P system
1. Cooling water Temp have no effect on
2. No Vacuum variation during summer time
3. Utility cost 1/2~1/10 than water sealed
4. Suitable for high vacuum (100~10-3
5. Compare to current systems, more cost
will be saved to be bigger capacities.
1. Pressure varies with Cooling water temperature
2. Noise & abrasion due to cavitation
(by using air ejector, cavitation is prevented
and vacuum efficiency will be improved)
3. Power & cooling water consumption
is higher than capacity waste water contamination
4. Capacity limit to low vacuum(200-50torr)
5. Power & investment cost will be much
bigger to make big capacity.
Oil Rotary V/P system
1. Screw Type Dry Vacuum Pump (constant
2. Suitable for compressde vapor or moistrue
3. No need for oil change (but oil in bearing
should be changed every 6 months.)"
4. No contact between rotor and casing,
so no wear."
5. Suitable for any capacity(5~300 m3/ min)
from low capacity to high capacity.
6. Save 1/2~1/5 of power consumption than
oil rotary vacuum pump of same size.
1. Initial vacuum is good, but vacuum varies
2. Condensed vapor and moisture emulsify
with vacuum oil & cause process unstable.
3. Vane or piston's abrasion is high. Maintenance
4. Frequent vacuum oil change
5. Limit on capacity. Only for small size.
6. Too much power consumption compare to
Steam Booster system
1. Utility cost 1/10~1/15 of steam booster.
2. Originally eliminate waste water problem
3. Keep constant vacuum and stabilize Process
in spite of water Temp. Variation in summer.
4. Small size compare to capacity could
5. Easy maintenance.
6. Simple operation due to system automation
7. Easy capacity control & good for
high capacity (5~300m3/ min)
1. Too much utility cost. (steam, cooling
2. Waste water & pollution problems
by using barometric condenser.
3. Cooling water temp. rise during summer
(in barometric condenser) result product
4. Need large space for installation compare
5. Too much utility costs due to nozzle
abrasion for long time use.