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Vacuum Pumps The installation of a Variable Swiftness Drive (VSD), sometimes called a variable frequency drive, usually saves between 50 and 65% in electrical power costs with the same or better regulation of vacuum. The number of energy savings can be from 30 to 80 percent. They can be adapted to blower or in some instances rotary vane type vacuum pumps. They work by changing the velocity of the vacuum pump predicated on the reading from a pressure sensor that’s mounted on the vacuum Energy-Conserving Vacuum Pump collection near the receiver jar. The VSD is basically a dedicated pc with many adjustments therefore it may be possible to boost vacuum regulation over the typical pneumatic vacuum regulator that just has a vacuum level adjustment. A VSD for a vacuum pump is usually cost-effective for a dairy that milks a total of 8 hours or more per day. Typically a VSD will never be a cost-effective option for little dairies because of less milking period and therefore shorter vacuum pump operate times but there are some other options to save energy costs.