Used WELCH 8920 #9277075 for sale

WELCH 8920 is an oil-free, dry-vacuum pump that is used in many industrial and laboratory settings. It operates by using a combination of mechanical and electrical components to achieve a vacuum without the need for additional lubrication fluids. The main components of the pump consist of a positive-displacement scroll-type compressor, a control panel, and an optional suction regulator. The scroll-type compressor utilizes two scrolls that are mounted eccentrically on two parallel shafts, which rotate in opposite directions. When the compressor is in operation, the eccentrically mounted scrolls are rolled out and air is drawn in through an inlet port in the side. This air is then compressed within a closed chamber between the two scrolls and is discharged as a high-pressure flow at the exhaust. The control panel on 8920 provides precise control over the vacuum system. It contains n-proportional/integral pressure and vacuum control valves to ensure the maximum achievable performance. The control panel also includes alarms to alert the user if there is a malfunction or overheating in the vacuum system. The optional suction regulator allows the user to regulate the inlet vacuum, which helps to maintain a constant vacuum throughout the process. The suction regulator also includes an exhaust filter to help maintain cleanliness in the vacuum system. Overall, WELCH 8920 is a durable, efficient, and reliable dry-vacuum pump that is ideal for a wide range of applications, including laboratory and industrial environments. Its simple designs, reliable components, and efficient performance make it an ideal choice for those looking for a reliable vacuum pump.