Liquid Ring Vacuum Pump

Liquid Ring Vacuum Pump

Features :

1. Safety : Capable of handling gasses containing mist and steam without trouble as the gas is sucked and compressed in each cell of the impeller by the water piston movements. There is no metal-to-metal contact for internal parts and the pump is free from gas leakage due to being sealed by the liquid film. Therefore, the pump is suitable for sucking and compressing explosive, flammable, and corrosive gasses.

2. Economy: Outstanding power consumption is realized thanks to the high efficiency design, with a focus on economy (power consumption is reduced by 30% compared to double action type). The liquid ring construction assures leak free operation and effective compression, making it appropriate for valuable gas transferring applications.

3. Low Noise Operation: Continuous suction and compression by the impellers revolution, suppressing pulsation and vibration resulting in low noise operation. Noise can be further suppressed when used in combination with a silencer suppressor.

4. Durability: In addition to the simple and robust construction, the pump has excellent durability as there is no wearing or mechanical contacts of internal parts other than the shaft seal . The side gas intake construction (gas inlet and outlet on the pump are vertically aligned to the shaft) makes the pump less susceptible to wearing, enabling the pump to maintain high efficiency over long periods of time compare to internal gas inlet types (NASH systems).

5. Cleanness: A clean environment can be maintained as it is free from oil mist, compared to oil sealed rotary vacuum pumps.

Construction and Operating Principle

Liquid ring vacuum pumps are a single stage vacuum pump with a side gas suction inlet. The main components of the pump are the cylindrical casing, cover and port plates for both the front and rear end, impeller shaft concentrically arranged relative to the casing, bearings, and shaft seal. As shown in the picture on the right, the water in the casing is pushed put circumferentially as the impeller turns to form the liquid ring which in turn creates the crest shaped space at its center. This space is divided into a number of cells by impeller blades. Those segments repeat compression and expansion as the impeller turns. By providing gas inlets and outlets at proper locations on the port plates the machine works at the vacuum pump or the compressor where the gas is continually sucked, compressed, and discharged.

Liquid Ring Vacuum Pump Models

LVFD/LVSD Close-coupled Type
LVF/LVS Compace Size Base-mounted Type
SKH400-800 Medium Size Base-mounted Type
LV102/202 Large Size Belt Driven Type

In addition to the liquid ring vacuum pumps listed above, NIKUNI also offers unified vacuum systems – UNIVAS, complete with vacuum pump, seal water tank, silencer separator. Enable to miniaturize overall system sizes, save installation foot print and replaceable of existing vacuum systems. 

For more details and specifications on the pumps or UNIVAS systems mentioned above, please download a copy of the catalog below.