Q. How much weight can a shop vacuum lifter?

Using large sheet metals vacuum lifters can carry loads of up to 20000 kilograms. This estimate is based on the assumption that the location where the vacuum cup will be utilized has an ambient pressure of 14.7 psi. By reducing the air pressure the vacuum pump modifies the environment. Since the original atmospheric pressure has increased to the left the mercury has been "pushed" down. There is a 26-inch gap between them. Consequently the vacuum pump has produced a vacuum of 26′′Hg (twenty-six inches of mercury). The atmospheric pressure across the world is constantly shifting.