Vacuum Pumps Installing a Variable Speed Drive (VSD), sometimes called a variable frequency drive, usually saves between 50 and 65% in electrical power costs with the same or better regulation of vacuum. The number of energy savings could 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 velocity of the vacuum pump predicated on the reading from a pressure sensor that is installed on the vacuum range near the receiver jar. The VSD is Energy-Conserving Vacuum Pump china basically a dedicated pc with many adjustments so it may be possible to boost vacuum regulation over the normal pneumatic vacuum regulator that only has 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 each day. Typically a VSD will not be a cost-effective option for small dairies because of less milking time and therefore shorter vacuum pump run times but there are some other options to save lots of energy costs.