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Liquid Ring – Vacuum Pumps

Application

Vacuum pump is used for compressing dry and wet gases on the plants of chemical and pharmaceutical industry, food-, semi-luxurie and paper industry.

Water ring vacuum pump used for evacuation of apparatus and piping systems, impregnating, distillation, drying, sterilization, boiling, draining and compressing of explosive and aggressive gases.

Furthermore, they can be used on desalination plants for freshwater production, degassing of melted steel, on pneumatic transport systems and for draining.

Design

• An eccentric rotor located in cylindrical pump casing transmits the power to a liquid ring, which after starting-up takes a concentric form to the casing. By means of this arrangement, the liquid is displaced from an impeller cell and is sucked into cell again. On the area of the impeller-cell the liquid ring is exhausted. The gas is discharged at the pressure side via an outlet part. During operation the pump must continuously be supplied with service liquid, normally water, in order to eliminate the heat resulting from gas compression and in order to replenish the liquid ring, because some of the liquid leaves the pump together with the gas. The liquid can be separated from the gas in a liquid separator. Re-use of the service liquid is possible.

• Liquid ring vacuum pump has the following important features: Almost all gases and vapours can be pumped. The gases being pumped can be saturated with vapour. Small quantities of entrained liquid can be handled. Compression of the gases and vapours being pumped is nearly isothermal.

• Liquid ring vacuum pump does not require any lubricant in the working space. Reliable operation with minimum maintenance. Low noise and vibration levels. Adaptable to most duties when correct choices of materials of construction and service liquid are made. They can be applied without modification as compressors up to a compression pressure of 1 bar.

Connections

• Flange connections, suction and discharge radial or tangential upwards.

Shaft sealing

• Stuffing box or mechanical seal.

Materials

• Casing: cast iron, bronze, stainless steel

• Impeller: bronze, stainless steel

• Shaft: chrome steel, stainless steel

Driver

• Electric motor

Direction of rotation

• C.W

Power transmission

• Flexible coupling

Bearing

• both sides grease lubricated ball bearings