What component of a rotary piston pump ports the fluid in and out of the cylinders?

The component responsible for porting fluid in and out of the cylinders in a rotary piston pump is the pintle. The pintle serves as a critical part of the pump's design, allowing the correct flow of hydraulic fluid into the cylinders for compression and enabling the discharge of fluid after it has been utilized for work.

In rotary piston pumps, the pintle's configuration and movement ensure that the fluid can enter and exit the cylinders efficiently, contributing to the overall functionality and performance of the hydraulic system. This design helps to maintain the pressure dynamics necessary for effective pump operation.

Other components, such as the piston and the swash plate, play crucial roles in the pumping process but are not directly responsible for the fluid's porting. The pressure relief valve is designed to protect the system from excessive pressure but does not participate in the fluid-porting function. Understanding the specific role of each component clarifies how they work together to facilitate hydraulic operations in such pumps.