For
many years, Flanges Australia tube fittings have proved a success in a great
variety of technical applications. Manufactured by Larga according to DIN
EN ISO 8434-1 and DIN 2353, the geometric shape of our tube fittings is the
basis for a simple, reliable, and most important of all, leak free operation
of hydraulic tubes and fittings. The assembly process can either be carried
out in the fitting body or in a special assembly die, although we recommend
the latter. Stainless steel fittings should always be assembled in the assembly
die.
When tightening the nut the cutting edges of the Flanges Australia progressive ring are moved in axial direction towards the standardised 24 degree cone.
This movement, which is exactly defined by the geometric shape, causes the cutting edges to bite into the tube surface, leading to a firm tube clamping. The right assembly can be recognised by a visible collar of cut tube material which is solidified by this cold forming process.
The cutting ring also has a stop shape which causes a considerable increase of the assembly forces, giving a clear indication to stop the assembly.
The shape of the cutting ring, the nut and the fitting body provides an excellent resistance against stress concentration, it is particularly important to point out that the cutting ring acts aa a spring as it is clamped between the nut and the fitting cone. This spring effect is an important feature to dampen vibrations which might otherwise lead to fitting leakages.
To meet customer requirements in terms of increased leak proofing, the Flanges Australia product range now also includes the SRWD soft seal. The shaped seal assembles by slipping over the standard ring and offers an additional protection against leakages. This new system is the perfect answer to the 'weeping' of a joint due to successive repeated assemblies, springing of the tube into the coupling or simply a small damage to the sealing faces.
Of course, it is possible to carry out repeated assemblies, by simply replacing the soft seal with a new one. This truly is a low cost answer to any slight sealing problems on existing circuits.
SRWD Soft Seal shown in assembled condition.
Flanges Australia flared fittings were originally designed for high pressure hydraulic systems using JIC flared tube and are often used for applications which are subject to strong vibrations.
With these adaptors it is possible to use the total range of fittings with 24 degree cones, the answer lies in the adaptor ring which converts the 24 degree female cone to 37 degrees male cone, as shown above.
The adaptor (shown above with one elastomer seal) can also be supplied with two elastomer seals.
In the diagram above, the complete fitting consists of body, adaptor ( with one or two elastomer seals), sleeve and nut.
The tube end must be flared to 37 degrees to suit the standard cone.
Using the adaptors it is possible to combine the range of metric fluid connectors to the imperial JIC flared tube system.
Properly machine flared tube ends will assure a long trouble free service even under the most critical operating conditions.
These fittings were developed for heavy duty applications such as tube assemblies for hydraulic presses or steel mills and offer a technical solution of a manufactured welded tube connection.
Flanges Australia weld nipples have an 'O' ring seal for higher protection against leakages and, of course, fit into the 24 degree cones of metric fittings.
For obvious reasons it is necessary to remove the 'O' ring before welding and additional care needs to be taken to clean the fitting bore and remove possible welding beads.
The tube fittings mentioned in our catalogue are manufactured according to DIN 2352 and DIN EN ISO 8434 ff. And are designed for applications in hydraulic fluid technology.
The Flanges Australia product range comprises a great variety of tube fittings which go beyond the industrial standard. Special tube fittings with jump size port threads are all manufactured to the respective industrial standard and are guaranteed to have excellent interchangeability.
Flanges Australia tube fittings have been designed to meet the nominal pressure ratings stated in the relevant standards.
Please note that the safe and reliable functioning of our tube fittings requires strict adherence to the assembly instructions given in our catalogue.
Flanges Australia tube fittings are manufactured from forged or cold rolled carbon steel and comply with the technical requisites for tube fittings according to DIN 3859.
Materials used include 1.0718, 1.0401, 1.0402, 1.0037
Flanges Australia stainless steel fittings are manufactured from austenitic high grade steel X6CrNiMoTi17 12 2 according to DIN 17440/EN100888, material No. 1.4571. This material, also known as V4A is a widely used standard steel in the chemical industry.
Flanges Australia brass fittings are made of CuZn 35 Ni 2 according to DIN 17660 / 17672, material No 2.0540
Flanges Australia tube fittings are designed for an operating temperature range from -40 C to +120 Celsius.
However, it is necessary to consider the temperature resistance of rubber elastomers if additional seals are being used.
Please Note:
|
-40 C to +120 C -35 C to +100 C -25 C to +120 C -60 C to + 400 C |
Standard elastomer for seals
In case stainless steel fittings are subjected to high working temperatures, the following pressure reductions must be considered
| Temperature | Pressure Reduction |
| -60 C to +20 C + 50 C +100 C +200 C +300 C +400 C |
- 4% 11% 20% 29% 33% |
The Flanges Australia tube fitting program is divided into three main types of fittings according to the permissible working pressure and application;
Tube fittings are often classified by their ratings for the nominal pressure PN and operating ( working) pressure PB.
The nominal pressure PN is only used for the classification of a hydraulic fluid system and has a design factor of 4.
The operating pressure PB defines the highest allowable operating working pressure of a component, depending on the material and based on the calculation of the permissible operating temperature.
The design factor for Flanges Australia tube fittings classified by the declaration of the operating pressure PB is 2.5 unless otherwise stated.
37 JIC flared fittings have been developed with a design factor of 4.
A safe and reliable operation of a fluid system always requires a faultless assembly of both the fittings and cutting rings and a sound positioning of the hydraulic tubes.
