700 Bar Hollow Hydraulic Cylinder

700 Bar Hollow Hydraulic Cylinder | Hidroman

700 Bar Hollow Plunger Hydraulic Cylinder – CRSSH Series

The Hidroman CRSSH Series 700 bar hollow plunger hydraulic cylinders are designed for high-force tensioning, pulling, pushing, testing, and maintenance applications. The hollow piston design provides a central opening through which a compatible rod or connection component can pass. This configuration is useful for applications where a conventional solid-piston cylinder may not provide the required connection arrangement.

The single-acting, spring-return design allows hydraulic pressure to extend the piston, while the return spring helps retract it when hydraulic pressure is released. Model selection should be based on the required force, stroke, center-hole diameter, mounting dimensions, and operating conditions.

Key Features of the CRSSH Series

700 bar operating pressure: Designed for high-pressure hydraulic applications.
Hollow plunger design: Allows a compatible rod or connection component to pass through the center of the cylinder.
Pulling and pushing applications: Can be used in suitable force applications when the mounting and loading arrangement is compatible with the cylinder design.
Single-acting operation: Hydraulic pressure drives movement in one direction.
Spring return: Helps retract the piston after hydraulic pressure is released.
Support seal: Helps reduce the effects of eccentric loading and limit wear.
Heat-treated cylinder and piston: Components are hardened through heat treatment for durability.
Removable hardened saddle: Provides a replaceable hardened contact head.
Dust seal: Helps prevent contaminants from entering the cylinder.
Mounting provisions: Clamping-collar threads, piston threads, and base mounting holes support installation.
High-pressure connection: The product page specifies an HP700N38FN female quick coupling with 3/8-inch NPTF threads, rated for 700 bar, and a dust cap for all models. Confirm the exact connection compatibility before ordering.

Technical Specifications

Feature	Specification
Series	CRSSH
Product type	Hollow plunger hydraulic cylinder
Maximum operating pressure	700 bar
Operating principle	Single-acting
Return mechanism	Spring return
Piston design	Hollow center
Cylinder and piston	Heat-treated and hardened
Load support	Support seal designed to reduce the effects of eccentric loading
Piston saddle	Removable hardened saddle
Contamination protection	Dust seal
Mounting	Clamping-collar threads, piston threads, and base mounting holes
Connection	HP700N38FN, 3/8-inch NPTF, 700 bar female quick coupling and dust cap; verify before ordering

Pressure conversion: 700 bar equals 70 MPa or approximately 10,153 psi.

Stroke length, rated force, closed height, center-hole diameter, and model-specific dimensions should be verified against the technical data for the selected product code.

What Is a Hollow Plunger Hydraulic Cylinder?

A hollow plunger hydraulic cylinder is a specialized cylinder with an opening through the center of its piston. This opening allows a compatible rod, tensioning element, or connection component to pass through the cylinder.

The design can be advantageous in pulling, tensioning, and maintenance applications where a central connection is required. The force produced depends on the operating pressure, effective piston area, and mechanical arrangement. Therefore, the 700 bar pressure rating alone does not determine the cylinder's force capacity.

Applications of 700 Bar Hollow Hydraulic Cylinders

Tensioning and preload applications

Suitable for evaluating in applications that require controlled tensioning of compatible rods, bolts, and connection components.

Industrial maintenance and repair

Can be used with suitable tooling to apply high force during equipment disassembly, installation, or positioning.

Pulling and pushing operations

The central opening accommodates compatible connection components for selected pulling and pushing tasks. The actual arrangement must comply with the manufacturer's permitted loading directions and installation requirements.

Testing and inspection equipment

May be integrated into test fixtures requiring high hydraulic force, provided the system design and safety provisions are appropriate.

Heavy industrial machinery installation

Can support selected assembly, maintenance, and controlled positioning tasks when paired with compatible hydraulic accessories.

Hydraulic service and repair shops

Suitable for consideration in professional maintenance environments that use high-pressure hydraulic tooling.

How Does a Single-Acting, Spring-Return Cylinder Work?

The CRSSH Series uses a single-acting operating principle. Hydraulic pressure moves the piston in one direction. When pressure is released, the return spring helps move the piston back toward its starting position.

This arrangement can be useful where a second hydraulic line for retraction is not required. The spring's return capability and operating conditions must still be appropriate for the application, as specified in the product documentation.

How to Select the Right 700 Bar Hollow Plunger Cylinder

Consider the following parameters before selecting a model:

Required force: The pulling or pushing force needed for the task.
Stroke length: The required piston travel.
Center-hole diameter: The diameter of the rod or connection component passing through the cylinder.
Available mounting space: Closed height, outside diameter, and working clearance.
Operating pressure: The allowable pressure ratings of the cylinder and connected equipment.
Return mechanism: Whether spring return is suitable for the application.
Connection type: Compatibility with hoses, couplings, and fittings.
Duty cycle: Whether the application is intermittent or involves frequent repeated operation.

Rated force and stroke must be verified using the manufacturer's technical specifications for the selected model.

Safety Considerations for 700 Bar Hydraulic Cylinders

Hydraulic equipment operating at 700 bar can cause serious injury and equipment damage if incorrectly installed or operated. Follow these precautions:

Verify the pressure ratings of the cylinder, pump, hoses, and couplings.
Use the cylinder only in loading directions permitted by the manufacturer.
Ensure the load is stable and the cylinder is correctly positioned.
Do not remove or disassemble a loaded system without suitable mechanical support.
Never manipulate hoses or fittings while the system is pressurized.
Fully depressurize the system before maintenance or changing connections.
Follow the manufacturer's operating manual and safety instructions.

A hollow plunger design does not automatically make a cylinder suitable for every pulling or pushing application. The complete load arrangement, mounting method, and connection components must be assessed.

Request a Quote for the Hidroman CRSSH Series

Hidroman 700 bar hollow plunger hydraulic cylinders offer a solution to consider for high-pressure tensioning, pulling, pushing, testing, and maintenance applications.

To help identify the appropriate model, provide the required force, stroke length, center-hole diameter, mounting dimensions, and intended application.

Contact Hidroman for technical selection support and a quotation for the CRSSH Series 700 bar hollow plunger hydraulic cylinder.

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