This Vacuum Pump Single Stage features a high-volume fan that provides cool air to the motor and pump and a vapor discharge/oil fill port with an internal check valve to prevent the escape of liquid oil. Mastercool 90066-B also features cooling fins to keep the temperature cooler during extended operation and a manifold valve that isolates the pump from the system testing for leaks.

This Vacuum Pump Single Stage features a high-volume fan that provides cool air to the motor and pump and a vapor discharge/oil fill port with an internal check valve to prevent the escape of liquid oil. Mastercool 90066-B also features cooling fins to keep the temperature cooler during extended operation and a manifold valve that isolates the pump from the system testing for leaks.