Vacuum Pumps Installing a Variable Acceleration Drive (VSD), Energy-Conserving Vacuum Pump 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 function by changing the swiftness of the vacuum pump based on the reading from a pressure sensor that’s mounted on the vacuum collection close to the receiver jar. The VSD is actually a dedicated computer with many adjustments so it may be possible to improve vacuum regulation over the typical pneumatic vacuum regulator that only has a vacuum level adjustment. A VSD for vacuum pressure pump is usually economical for a dairy that milks a complete of 8 hours or even more each day. Typically a VSD will not be an economical option for small dairies due to less milking period and therefore shorter vacuum pump operate times but there are some other options to save energy costs.