Liquid Ring Vacuum Pump Power Calculation Formula

Bkw 13 5 sf 1 088 where.

Liquid ring vacuum pump power calculation formula.

Today s blog entry deals with quick but reliable estimate of the power consumption of vacuum pumps used in the chemical process industry. Water ring vacuum pumps are often used in the vacuum system of large paper machines which refer to water ring vacuum pumps. Capacities expressed in cfm or scfm standard cubic feet per minute can be very misleading because we have to take into consideration the volumetric efficiency of the pump at a specific vacuum. You might get a doubt that how the formula for pump capacity is derived but there is nothing but just a unit conversion by incorporating the required end vacuum i e ultimate pressure.

Some equations are presented below for the benefit of the readers. Liquid ring pump 20 30 torr 2 5 torr. Liquid ring vacuum pumps are all rated in acfm the actual capacity at the different vacuum levels as shown on the individual pump performance curves. Most liquid ring vacuum pumps are designed to operate from a vacuum suction to an atmospheric discharge pressure.

Concerning the power of liquid ring pump due to the absorption and the removal of the heat by the operating liquid the gas compression process in the liquid ring pump is generally regarded as isothermal one so the formula for the isothermal compression power of the ideal gas is commonly used to calculate the effective power of the liquid ring pump 12 13. Water ring vacuum pump has less maintenance workload less power consumption than the former and large single machine capability but it needs working fluid and the system is relatively complex. Bkw 21 4 sf 0 924 rotary piston pump. Liquid ring nash pump.