2. How does a vacuum pump run? *The SOL-VAC™vacuum pump is a pump that is powered by compressed air. When compressed air (①) flows through each nozzle (②), the air is pulled through the flow of the compressed air. As the valve of each chamber(③) opens, air flows in, creating low pressure and the resulting vacuum at (④). * The SOL-VAC™ vacuum pump runs only on compressed air (4~6bar). Its internal structure is a multi-nozzle type, so the vacuum degree can be achieved much more efficiently than the existing single-nozzle type. As the pump has no driving parts, it is semi-permanent without being broken.