Which positive displacement pump is equipped with a belt-driven lubricator?

The positive displacement pump that is equipped with a belt-driven lubricator is the sliding vane pump. This type of pump operates by using vanes that slide in and out of a rotor to create pockets of fluid that are moved through the system. The inclusion of a belt-driven lubricator helps ensure that the pump operates smoothly and efficiently, as proper lubrication reduces friction and wear on the moving parts, extending the life of the pump and maintaining optimal performance.

In contrast, gear pumps and diaphragm pumps do not typically utilize a belt-driven lubricator. Gear pumps rely on the meshing of gears to transfer fluid, while diaphragm pumps use a flexible membrane to create a vacuum and draw in fluid. Both designs have different lubrication needs and mechanisms that do not require the same kind of lubricating system as sliding vane pumps. Centrifugal pumps, on the other hand, are not positive displacement pumps but instead rely on rotational energy to move fluid, thus operating under entirely different principles and mechanisms.