A telescopic hydraulic cylinder, also known as a multistage hydraulic cylinder or a telescoping cylinder, is a type of hydraulic cylinder that consists of multiple nested stages or sections that extend and retract to achieve different stroke lengths. It is commonly used in applications where a long stroke is required but space is limited.
The telescopic hydraulic cylinder typically consists of the following components:
Cylinder Barrel: The cylinder barrel is the main body of the telescopic hydraulic cylinder. It is usually made up of several nested stages or sections, with each section sliding inside the next larger section. The cylinder barrel houses the hydraulic fluid and guides the movement of the nested stages.
Pistons and Piston Rods: Each stage of the telescopic hydraulic cylinder has its own piston and piston rod. The piston separates the cylinder barrel into separate chambers, and the piston rod extends from the piston to connect to the next stage. As hydraulic pressure is applied, the pistons and piston rods extend or retract, allowing the cylinder to achieve different stroke lengths.
Seals: Seals are used to prevent leakage of hydraulic fluid and maintain the separation of chambers between the nested stages. These seals ensure efficient operation and prevent fluid loss as the cylinder extends and retracts.
End Mountings: The telescopic hydraulic cylinder is typically equipped with end mountings at both ends to facilitate its attachment to the equipment or system it is being used in. These mountings can be clevis mounts, trunnion mounts, or other types of custom mountings depending on the specific application.

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