Designed with innovation and efficiency in mind, our air-powered Venturi pumps require no electrical power source or lubricant. Their revolutionary design takes advantage of the venturi effect, where compressed air passing through a constricted orifice creates a pressure drop that draws air through a vacuum port. This results in a clean and efficient vacuum (up to 27.1" Hg) without the need for oil or electricity. With no moving parts or electrical hazards, our air-powered pumps offer an intrinsically safe solution for your vacuum needs. Their remarkably compact size allows you to design vacuum systems with smaller, less expensive components, reducing both initial costs and long-term maintenance expenses. We've also included a replaceable silencer in each model (except 79165-40) to reduce noise levels by up to 30% while offering minimal resistance to air flow. Select the vacuum pump that best suits your specific application. We even offer a model (78165-20) with a built-in vacuum gauge for easy visual monitoring, which proves helpful during troubleshooting. To ensure optimum performance and longevity, we recommend placing an air filter upstream of the pump. This filter should have a pore size of 50 µm or smaller, effectively prolonging the service life of your vacuum pump. Whether you're a scientist, engineer, or manufacturer, our Cole-Parmer Venturi Vacuum Pump is your go-to solution for clean and efficient vacuum operations.