DIN 2353 Tube Connections for Industrial Hydraulic Systems

DIN 2353 defines a mechanical tube connection system used in hydraulic and fluid power installations. Hydrofit Engineers supplies the relevant fitting range for rigid tube lines, with material and configuration selected for the application. Based in Chennai, Hydrofit serves industrial customers across India.

The fitting body, nut, cutting ring or ferrule, prepared tube and mating connection must be treated as one assembly. Buyers can review the broader hydraulic fittings range or use this page for DIN 2353 specific selection and enquiry information.

Understanding the DIN 2353 Connection

A typical connection combines a tube, fitting body with a 24-degree cone, cutting ring and nut. During correct assembly, the nut advances the cutting ring against the cone. The ring engages the prepared tube surface to create a mechanical grip while the matched components form the connection. Tube dimensions, surface condition, insertion and assembly procedure therefore affect the result as much as the fitting itself.

The ferrule fitting range uses this cutting-ring principle. DIN 2353 describes a specific standardized tube-connection family; the parts should not be selected only because another ferrule fitting looks similar. Tightening a poorly matched connection further is not a substitute for correct identification and assembly.

Technical Specifications of DIN 2353 Fittings

No universal pressure or temperature value applies to every fitting on this page. Use size-specific product information when available and confirm uncertain details before ordering.

Light Series and Heavy Series Are Not Selected by Name Alone

Light and Heavy Series identify different design combinations; they are not a simple good-better comparison. Selection depends on tube outside diameter, wall thickness, material, fitting configuration, pressure requirement and system design. Two assemblies with the same apparent tube size may require different components.

Do not substitute one series because Heavy sounds stronger or Light sounds sufficient. Confirm the existing series and mating components for replacement work. Pressure capability also varies with the complete fitting, size, material and configuration.

Identifying the Correct DIN 2353 Fitting

For a replacement, check the tube OD, tube wall thickness, fitting configuration, thread or end connection, Light or Heavy Series, material, existing markings and mating component. Two fittings can appear similar externally while using different connection details.

If identification is uncertain, provide the existing sample or clear photographs together with measured dimensions, a drawing, part number and equipment connection details. These references help distinguish the connection before a quotation is prepared.

Fitting Configurations Within the DIN 2353 Range

The existing Hydrofit range includes the following configurations. The required form depends on line routing, connection points and access for assembly:

• Straight connectors
• Equal unions
• Reducing unions
• Elbows
• Equal tees
• Reducing tees
• Bulkhead fittings
• Male connectors
• Female connectors
• Adjustable fittings

Straight and reducing types join aligned tube runs or different sizes. Elbows and tees change or divide the flow path. Bulkhead types pass through a panel, while stud and threaded ends connect the tube system to equipment ports. Retain correct alignment and avoid adding joints that the circuit does not require.

Matching DIN 2353 Fittings with Hydraulic Tubes

The tube forms part of the connection. Match its outside diameter, wall thickness, material, roundness and outer surface to the fitting series. Cut the tube square, remove burrs without damaging the gripping area and keep the tube clean before assembly. Long tube runs also require suitable support to control movement and vibration.

Hydrofit’s hydraulic tubes and seamless tube options should be assessed against the selected fitting rather than assumed compatible from nominal size alone. General pipe dimensions and precision tube outside-diameter specifications are not interchangeable.

DIN 2353 Compared with Other Hydraulic Connection Systems

DIN 2353 is a cutting-ring tube connection system. BSP threaded fittings, JIC 37-degree flare fittings and ORFS face-seal fittings use different connection and sealing principles. They may appear in the same hydraulic installation, but they should not be treated as interchangeable because a thread or outside dimension looks similar. Identify both ends of the required connection before selecting an adaptor or replacement.

Where DIN 2353 Connections Are Used

Applications include hydraulic power packs, industrial presses, machine tools, construction and material-handling equipment, steel plants, manufacturing machinery, automotive production equipment, marine hydraulic systems and industrial automation. The exact fitting must still be selected for the tube, fluid, pressure, environment and connection layout.

What to Include in a DIN 2353 Fitting Enquiry

An enquiry such as “DIN fitting 12 mm” is not enough to identify the component. Please include:

• Tube outside diameter and wall thickness
• Light or Heavy Series, if known
• Fitting configuration
• Thread or end connection
• Material
• System working pressure
• Fluid or media
• Operating environment or temperature where relevant
• Quantity
• Drawing, sample, part number or clear photographs where available

DIN 2353 Fittings Supply Across India

Hydrofit Engineers is based in Chennai and supplies DIN 2353 fittings and related hydraulic products to industrial customers across India. Enquiries are reviewed against the connection, tube and operating details supplied rather than size alone.

Frequently Asked Questions About DIN 2353 Fittings