Rubbernek Fittings

Rubbernek Tube Fittings incorporate a unique and proven circumferential sealing principle that meets system designers and users requirements for a pipe fitting that will assure leak resistant hydraulic couplings on standard, medium and thin wall steel tubing.

The sealing action is based on rubber to metal contact between the tubing and the connector. For this reason Rubbernek Tube Fittings can better absorb impulse shocks, pressure surges and vibration.

The Rubbernek principle

The principle is a belville type frustroconical washer that is deflected in the assembly by the pressure of the rubber seal against the guide and, in turn, against the I.D of the washer, resulting in a straightening of the washer and contact and penetration into the tube surface. As the nut is further tightened, the seal is displaced and compressed to a pressure of approximately 3000 PSI around the tube to form a more effective seal against leaks or seepage. Surface imperfections in the tube do not affect the sealing efficiency of the fitting. Rubbernek Tube Fittings may also be disconnected and re-connected at the same tube end.

No tube preparation required

When using Rubbernek Tube Fittings no tube flaring or other special preparation is necessary – beyond a clean cut and normal de-burring. Tube ends do not need to be perfectly square and exact tube lengths are not necessary as Rubbernek Tube Fittings require a minimum grip on the circumference of the tube.

Faster system assembly

Rubbernek Tube Fittings permit faster assembly of hydraulic and pneumatic systems because leak resistant connections can be made by merely tightening the nut until it bottoms on the connector. No guess work, no “feel” is necessary, because the connection is sure when the nut is tight. The risk of over-torquing or under-torquing is reduced because the nut comes to a positive stop at a pre-determined point.

Resistant to temperature extremes, solvents, chemicals

The Rubbernek Tube Fitting Seal is precision moulded from synthetic rubber compounds designed to function within wide temperature ranges. The standard seal has excellent resistance to hydro-carbons, fuels oils, gases and water and is highly resistant to oxidisation. Special seals to meet specific requirements and special applications are available on request.

Cost advantage

Rubbernek Tube Fittings offer savings in overall costs:

• The simplified assembly allows anyone, even inexperienced labour, to install proper joints
• No tube preparation is required
• No presetting is required
• Leak resistant design; rubber under compression minimises costly leaks and weeping
• Fast assembly inspection – a visual check can determine proper assembly

Special applications

Rubbernek Tube Fittings are recommended for use on low alloy steel tubing. Consult us for use on other tubing materials.

O Ring Face Seals

Rubbernek O Ring Face Seals (ORFS) fittings conform to SAE standards. These specifications not only control dimensions and tolerances but also include minimum performance requirements.

Rubbernek ORFS is approved and used by major OEM's around the world, reducing leakages and cost wherever they are used.

ORFS fittings have unlimited Make/Break facilities but we would always recommend that the O Ring be replaced when the fitting is being re used.

Rubbernek have developed the Captive Groove for our ORFS fittings. This prevents the seal from falling out on to the floor and getting lost. Please specify captive grove when ordering.

Rubbernek ORFS fittings are manufactured from steel or stainless steel and are used in a wide variety of applications including engines, construction equipment, power packs, and other hydraulic power applications.

Rubbernek ORFS fittings are available in straight fittings, 45 degree elbow fittings, 90 degree elbow fittings and in every conceivable combination of jump sizes. We produce swivel connectors for a large number of customers.

There are a vast array of potential uses for Rubbernek's ORFS fittings. We would like to advise you of the following criteria:

Steel fittings can be used with temperatures from – 40 degrees C to +120 degrees C

Stainless steel fittings can be used with temperatures from – 60 degrees C to + 380 degrees C

Always ensure you specify the correct O Ring Seals for the correct application:

• NBR Nitrile O Ring Seal - 30 degrees C to + 100 degrees C
• CR Neoprene O Ring Seal - 40 degrees C to + 145 degrees C
• EPDM Ethylene Propolene - 50 degrees C to + 145 degrees C
• FPM Fluorocarbon (Viton) - 25 degrees C to + 200 degrees C

Sealastic Tube Fittings

The Rubbernek Sealastic's resilient rubber seal, which is securely locked in place by a spring steel ferrule and a compression nut, forms a leak free cushion seal between the tube end and the fitting. This permits the tube to flex within the fitting and compensates for minor misalignment. Important time and labour savings can be achieved because of the Sealastic feature.

Many types of metal tubing may be directly connected to threaded ports in castings, manifolds, pumps etc with a Sealastic Male Nut Fitting. The Sealastic Cushion Seal and Ferrule (supplied as an assembly) is placed into the cavity and the nut is threaded into the tapped port. Pushing the tube through the nut until it bottoms and tightening the nut the required number of turns compresses the seal and spring steel ferrule on to the tube end, providing a tight, leak resistant seal. Sealastic Male Nut Fittings are available for tube sizes from 3/16 inch to 1 inch O.D.

Mini - Sealastic Tube Fittings

Flareless Tube Fittings

Special fittings

In addition to our wide range of standard fittings Rubbernek have the capability to manufacture components to customers drawings. We manufacture a wide range of fluid power couplings, unions, tees and banjo fittings and fabricate brazed assemblies.

We can also design components which provide solutions to customers problems. Tell us what you need and we will design and manufacture a component that meets your requirements.