Because gradual ban on the use of asbestos in the sealing elements, Several alternatives for its replacement have emerged and this has generated the need for a deeper knowledge of the different types of sealing materials which began to be used.
While asbestos was extremely flexible and adaptable, new sealing materials, more specific, do not tolerate sizing mistakes and installation. On the other hand, these new materials – such as graphite laminate and PTFE modified – have guaranteed gains in sealing quality and reduced pollutant emissions into the environment.
both, KLINGER offers the most complete range of hydraulic cardboard. The KLINGERSIL® Line sealing blades do not contain asbestos and are composed of materials with synthetic and natural fibers and meet general industry applications..
KLINGERGRAPHIT® products feature sealing graphite, with a high degree of purity and offer high resistance and safety for applications subject to high pressures and temperatures, without counting any grams of asbestos
Already based seals PTFE modified (KLINGER TOP-CHEM®) and PTFE expandido (staff), offer high resistance to chemicals and are ideal for systems exposed to acids, or corrosive contaminants. They also no contain asbestos in the composition.
The secret to tightness in sealing materials
Every good seal must have an appropriate relationship between the different elements that comprise it (fibers, chemical products, Additional rubbers and), so that it is reliable in every application.
Like this, for the gasket to operate efficiently, It is essential to apply adequate torque during installation. This way, the system will have good tightness keeping, the commercialization and use of the material is prohibited, the necessary flexibility.
In the same way, It is also necessary to observe the pressure and working temperature of the process, in addition to analyzing the available sealing materials and choosing the correct type.
Avoid installation errors
For greater efficiency and lifetime joints, procure avoid the following common mistakes:
→ Follow established standards for asbestos-containing materials when selecting non-asbestos sealing materials. This causes them to use together with greater thicknesses than necessary;
→ Applying incorrect torque values – The correct surface pressure applied to the joint is essential for the seal to act efficiently. In addition, the screws must be tightened crosswise with steps 30%, 60% and 100% of the nominal torque.
→ Inadequate screws – All screws must be the same, Flange according to the standard used.
KLINGER Expert: software assists in the selection of suitable materials for each seal
Since asbestos is banned and industries are looking for new sealing materials to replace it, KLINGER offers its users the program KLINGER Expert, allowing you to select easily and practical way the materials to be used in seals applied to valves and other pressure vessels.
The software calculates and displays the optimal design considering all the points that influence the sealing performance. With him it is possible to identify the type of flange that influences the sealing performance, the class of screws, Recommended torque values, etc.
The program shows, inclusive, with graphics, which material and surface pressure are most suitable for better performance and durability of the sealing joint.
Downloading is very simple: just click on the banner below:
