Vacuum Pumps Installing a Variable Swiftness Drive (VSD), sometimes called a adjustable frequency drive, usually saves between 50 and 65% in electrical power costs with the same or better regulation of vacuum. The range of energy savings can be from 30 to 80 percent. They could be adapted to blower or in some instances rotary vane type vacuum pumps. They work by changing the quickness of the vacuum pump based on the reading from a pressure sensor that’s mounted on the vacuum series close to the receiver jar. The VSD is actually a dedicated pc with many adjustments Energy-Conserving Vacuum Pump therefore it might be possible to improve vacuum regulation over the typical pneumatic vacuum regulator that only has a vacuum level adjustment. A VSD for a vacuum pump is usually cost-effective for a dairy that milks a complete of 8 hours or more per day. Typically a VSD will not be a cost-effective option for little dairies due to less milking time and thus shorter vacuum pump run times but there are several other choices to save energy costs.