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 may be adapted to blower or in some cases 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 installed on the vacuum collection near the receiver jar. The VSD is actually a dedicated pc with many adjustments 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 vacuum pressure pump is usually Energy-Conserving Vacuum Pump china economical for a dairy that milks a total of 8 hours or more each day. Typically a VSD will never be an economical option for little dairies due to less milking period and therefore shorter vacuum pump run times but there are some other choices to save energy costs.