DLV Series

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dlv Vacuum
DLV series double-stage liquid ring vacuum pump



DLV series two stage liquid ring vacuum pump is our new design based on 2SK pumps and combines Germany double-stage pump design criteria. This series has two compression processes, with steady suction speed in high vacuum, or keeping the high vacuum in a wide range of suction speed. Its efficiency in high vacuum is 35%-40% higher than that of single stage pump, but with less energy consumption.

Product Features
Ø  Wider range of suction pressure. Compared to other double stage pumps (suction pressure 50mbar-150mbarA), DLV pump works in 25mbar~1013mbar pressure, with less energy consumption, with15%-20% lower than traditional ones.
Ø  All kinds of models to fulfill various process requirements.
Ø  Materials are optional to make the pump possible to work in various harsh environment, Such as carbon steel, stainless steel, dual-phase steel, titanium, etc .
Ø  Scope of supply are optional, such as: pump head, pump with suction communicating pipe, separator and liquid pipes, pump aggregate with motor and base frame, complete set of closed cycle system with all auxiliary devices, the system with two or more stages when the inlet pressure is smaller than 33mbar (abs.).
Ø  Single or double mechanical seal and several flush method.
Ø   Precise casting, high standard accessories, imported bearing; high efficiency and energy saving.
Field of application
   DLV series pumps are very suitable for the process of vacuum drying, evaporation, distillation, concentration, filtering, degassing in industry of food, pharmacy, chemical, power plant, paper making, textile, metallurgy etc.

Two-stage liquid ring pump compared
From the performance curve above we can see that, single stage pump is suitable to work in a condition which do not ask for high vacuum, and its capacity is large; however in relative high vacuum, its capacity declines obviously (it declines rapidly below 200mbar and below 100mbar it is seriously declined), under this condition, the pump efficiency is quite low but cost more energy. However for double stage pump, it has larger capacity in relative high vacuum, and in high vacuum its efficiency is 30%-40% higher than single stage ones and consume less energy. Therefore double stage pump is more suitable than the single one to work in the condition asking for high vacuum and large capacity at the same time.
Technical Parameters

Model Motor
Motor  power Max. suction capacity Min. inlet pressure
kw HP m3/h CFM mbar Inch Hg a
DLV-140 1450 4.0 5.4 145 85 33 1.0
1750 5.5 7.4 174 102 33 1.0
DLV-180 1450 5.5 7.4 186 109 33 1.0
1750 7.5 10.1 223 131 33 1.0
DLV-300 1450 7.5 10.1 283 167 33 1.0
1750 11.0 14.8 314 185 33 1.0
DLV-350 1450 11.0 14.8 342 201 33 1.0
1750 15.0 20.1 411 242 33 1.0
DLV-400 1450 15.0 20.1 425 250 33 1.0
1750 18.5 24.8 475 280 33 1.0
                                           The data are for general reference, please contact us for actual parameters.

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