Vacuum Pumps Installing a Variable Speed Drive (VSD), sometimes called a variable frequency drive, usually saves between 50 and 65% in Energy-Conserving Vacuum Pump china electricity 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 instances rotary vane type vacuum pumps. They work by changing the swiftness of the vacuum pump predicated on the reading from a pressure sensor that is mounted on the vacuum collection near the receiver jar. The VSD is basically a dedicated computer with many adjustments therefore it may be possible to improve vacuum regulation over the typical pneumatic vacuum regulator 
that only includes a vacuum level adjustment. A VSD for vacuum pressure pump is usually cost-effective for a dairy that milks a total of 8 hours or even more per day. Typically a VSD will never be an economical option for small dairies due to less milking time and thus shorter vacuum pump run times but there are some other choices to save lots of energy costs.