If the application, for example, requires that the exhaust air is led into the ventilation system to avoid any particles from the conveyed products leaking out in the surrounding environment, a central exhaust can be fitted to the pump. If here is a need to decrease the noise level, there is an option with a free-flow silencer. The silencer fits the central exhaust, connected with a straight pipe fitting D=75. vacuum filter can be mounted on the feed adapter so that the carrying air into the conveyor is clean and not contaminated with particles from the surrounding environment.