Thanks to the know-how, which our company has acquired over the years, we are often approached to study the most suitable seal in relation with the requirements of our customers, and consequently formulating the relative compound, design the tool and finally proceed with the production itself.
The raw material used are purchased from certified companies, which are not considered simple suppliers, but as important partner, on which we can reply upon.
The material being one of the most essential elements for the success of a perfect sealing, Tecnogomma International has always paid very much attention to this, investing in many approved compounds.
In fact, to be able to satisfy the customer in the most complete manner, Tecnogomma uses all the principal elastomers in its productions. Subsequently below, you will find a brief description of the principal materials used in the production of to our articles and the respective compounds, which we have approved.
Certified Productive DWGW Process
This is a work sheet issued by DVGW in addition to the EN 549 or EN 682 approvals for gas application in Germany market. 
The work-sheet is subdivided in two parts:
The first one, which has already been obligatory in addition to EN 549 and EN 682 approvals, requires an identification test of the elastomeric material (through the IR technique).
The second one is still optional by now, and requires the following tests: Ozone resistance, Stress relaxation Tests, Compression set at condition of 3000 h at 70o C, with the surveillance of the compression set each 1000 h.
This test has the clearly intention to value the material behaviour in a quite significant time set. The maximum admitted compression set value has not been fixed.
