Vacuum Pumps The installation of a Variable Velocity 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 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 quickness of the vacuum pump predicated on the reading from a pressure sensor that’s mounted on the vacuum collection close to the receiver jar. The VSD is actually a dedicated computer with many adjustments therefore it may be possible to boost vacuum regulation over the typical pneumatic vacuum regulator that just has a vacuum level adjustment. A VSD for vacuum pressure pump is usually cost-effective for a dairy that milks a Energy-Conserving Vacuum Pump china complete of 8 hours or even more each day. Typically a VSD will not be a cost-effective option for little dairies due to less milking time and thus shorter vacuum pump operate times but there are several other options to save energy costs.