Progress of establishing a standard for measuring the performance of mechanical booster vacuum pump by ISO TC 112

Mechanical booster vacuum pumps (MBVPs) are widely used in many industrial applications in recent decades. While the performance measurement standard for MBVPs characterizing is still inadequate due to the strong dependence on the backing pump being not always known in advance. In order to ensure that the performance measurement of MBVPs is, as far as possible, carried out by uniform procedures and under uniform conditions, special pump characteristics are discussed and analyzed including the maximum tolerable pressure differenceΔpmax, effective compression ratio Keff, compression ratio with zero throughput K0 and by-pass valve pressure differenceΔp1. These parameters are practically proved to be sufficient and necessary to indicate the properties of MBVPs in the end. Simplified methods are introduced and discussed based on K0 to estimate the performance of MBVPs. Based on the results of practical usage and the existing standard of different countries, a corresponding experimental system is set up and detailed experimental principle is considered. It is intent that, as a result, measurements conducted by different manufacturers or in different laboratories, and statements of performance quoted in manufacturers' literature will be on a properly comparable basis to the benefit of both users and manufacturers.