Paronite: Properties And Applications

Modern industry is characterized by aggressive environments and elevated temperatures. Therefore, it is necessary to use sealing materials that are capable of operating under severe conditions. The requirements for such materials are contradictory and rather complex.

On the one hand, they must be resistant not only thermally, but also chemically, but on the other hand - they must be plastic and should not dissolve, in any kind of solvent or medium.

It is this universal sealing material that is paronite.

Paronite is a fairly complex species, which in its chemical composition contains:
- up to 70% of asbestos;
- about 15% synthetic rubber;
- about 8% of the vulcanizing substance, for example sulfur;
- about 15% of special fillers.

This is only an approximate composition of the paronite. Asbestos, present in large quantities, allows the material to show high levels of thermal and chemical resistance. A synthetic rubber gives it extra plasticity.

It should be noted that paronite is not subjected to any biological effects. This property allows expanding its scope, for example, in warm tropics, desert, or on cold continents.

Changing the composition of fillers can get a variety of types of paronite. For example, materials can work in corrosive hydrocarbon media or their mixtures.

Unfortunately, the paronite has a drawback - high adhesion, i.e. Adhesion to sealing surfaces. This can seriously complicate the work when dismantling or repairing equipment. But this defect can easily be corrected - it is only necessary to apply a layer of graphite on the sealing surface.

The process of manufacturing a paronite is not complicated. The necessary mixture of rubber, asbestos, mineral fillers and sulfur is first heated to the required temperature, and then rolled into sheets of the desired thickness from 0.4 to 6 mm. The finished product can be easily checked for strength - the folded sheet in half should not crumble, or break in any other way.

The scope of the paronite is wide enough. At high pressure exerted on the sheet, paronite Begins to flow, thus filling itself with any kind of apertures.

PON-B gaskets are used in pipelines and equipment operating both in saturated steam and in a variety of gases (dry, inert, neutral). As a cushioning material, paronite PON-A is actively used in compressors, industrial units, in pipelines. Its quality does not change under the influence of petroleum products (both heavy and light) and in an environment where a large amount of nitrogen and oxygen is contained.

Thus, it can compact various types of equipment in the metallurgical, chemical or petrochemical industry, working with sufficiently aggressive substances at high temperature (distillation apparatus, scrubbers, rectification columns, etc.).