By decreasing the pressure differences in the system and improving the controller efficiency, the controller was able to close and more air became available for milking. With the controller open less, less outside air was let into the system and the vacuum pump had to remove less air to maintain a constant level of vacuum. The cost savings is found in the reduced need for large vacuum pump capacity. When the controller is properly located in the system, less vacuum pump capacity is needed to maintain the same cfm available for milking. In some cases vacuum pumps can be geared down or replaced by smaller, more efficient pumps which require less energy to operate.
Energy use translates into costs.
By decreasing the energy needed to effectively operate the milking system, the costs associated with the milk parlor are reduced. This figure included energy use for milking, cooling, and storing milk on the farm. Using this simple prediction equation, you can compare your energy use with the south valley average. If your energy use is substantially higher than the average, it may be time to investigate your use more closely. One place to start is your milking system.