What are the different types of piston in hydraulic system?

In a hydraulic system, there are primarily two types of pistons used:

1. Single-Acting Piston: This type of piston is used in a single-acting hydraulic system. It has a seal on one side of the piston, allowing hydraulic fluid to enter and push the piston in one direction. When the hydraulic pressure is released, a spring or other mechanism returns the piston to its original position.

2. Double-Acting Piston: This type of piston is used in a double-acting hydraulic system. It has seals on both sides of the piston, allowing hydraulic fluid to enter and push the piston in both directions. This provides more control and flexibility in the movement of the piston within the hydraulic system.

These are the main types of pistons used in hydraulic systems, but there may be variations or specialized designs depending on the specific application and requirements.