Vacuum Pumps Installing a Variable Speed 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 can be adapted to blower or in some cases 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 therefore it could be possible to boost vacuum regulation over the typical pneumatic vacuum regulator that only has a vacuum level Energy-Conserving Vacuum Pump adjustment. A VSD for a vacuum pump is usually economical for a dairy that milks a total of 8 hours or even more each day. Typically a VSD will not be an economical option for small dairies because of less milking period and thus shorter vacuum pump run times but there are some other options to save lots of energy costs.