Diflex ® characteristics

y and m factors

For environmental and health protection reasons, all asbestos gaskets used in industry must be replaced. DIFLEX universal gaskets represent a valid alternative. Research and tests carried out by DIFLON have shown that the y and m factors of asbestos gaskets are fully compatible with those of the DIFLEX gaskets; therefore, when replacing them, clamping calculations remain the same as before, semplifiying engineering and maintenance operations in industrial facilities. (Contact DIFLON technical office, for any information). See Diagrams 1 and 2.

Diflex properties

IFLEX is resistant to almost all chemicals, pH 0÷14, acid and strong alkali, solvents, chlorine, catalyzers, liquid gas, vapour, diathermal oils, food, pharmaceutical and petrochemical products, etc.; the only exceptions are melt alkali metals and fluorinated products. See Comparative Table.
DIFLEX is recommended for use in the chemical, petrochemical, pharmaceutical, food, cryogenic industries, etc.
- DIFLEX is resistant to high levels of compression, maintaining its nelasticity.
- DIFLEX does not absorb moisture.
- DIFLEX does not stick both at high and low temperatures.
- DIFLEX is weatherproof and does not age even in a marine environment.
- DIFLEX is completely acid proof.
- DIFLEX is nontoxical.

Flat gaskets: Diflex

Application examples:
- flat gaskets for flanges of any type, with or without grooves
- profiled flat gaskets, with chamber, for rapid assembly, for exchangers and pressure equipment.
Our exclusive welding technology allows us to provide gaskets with no limits in terms of diameter and shape.

Purity of product for Diflex gaskets

DIFLEX can be used, without contra-indications, in the production of basic commodities, since the monomers used for its manufacturing fully comply with EEC 90/128-93/9-92/39 regulations and with title 21, sub-section 177/1550 "Perfluorocarbon resin" of Food and Drug Administration, U.S.A.

Fire resistance of Diflex gaskets

DIFLEX is a barely inflammable material, it has a LOI value of 95, and only burns in atmospheres with an oxygen content of more than 95%. The tests carried out by DIFLON, with the flame directly oriented onto the DIFLEX gasket, gave very good results, even though the material is a polymer. See Table 1.

Diflex gaskets in operation

DIFLEX gaskets were adopted for the first time in 1993 by large complexes and since then they have been included among the specifications drawn up by major engineering companies. Field experience shows that DIFLEX gaskets can be used for continuous service at a temperature range of -150°C to +260°C and also under high pressure.

Versatility of use

Thanks to their elastic properties, DIFLEX gaskets are suitable for various types of flanges, for example: pipes and fittings made of iron, AISI, iron/PTFE, iron/ENAMEL, CAST IRON, CAST IRON/EBONITE, PVC, MOPLEN, etc.

Practical remarks

It is very simple to assemble and remove DIFLEX gaskets; DIFLEX gaskets have high shape stability, they are not brittle and they are resistant to shock. After their installation, they perfectly adhere to all surfaces, including uneven ones.