Vacuum Pumps Installing a Variable Velocity 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 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 rate of the vacuum pump predicated on the reading from a pressure sensor that’s mounted on the vacuum Energy-Conserving Vacuum Pump china series near the receiver jar. The VSD is actually a dedicated computer with many adjustments therefore it may be possible to improve vacuum regulation over the typical pneumatic vacuum regulator that just 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 never be an economical option for little dairies because of less milking period and therefore shorter vacuum pump run times but there are some other choices to save lots of energy costs.