Description of the elastomeric element
The fundamental item of this coupling is the elastomeric element or elastomer, made in polyurethane and available in several hardness grades, for different uses and applications. The elastomer is manufactured to resist ageing, scoring, fatigue, hydrolysis and UV radiations, promoting longer life operation. It also resists main chemical agents, like ozone, oils, grease and hydrocarbons.
The elastomeric element becomes prestressed during the assembly between the relevant hub’s teeth, in order to be able to transmit the motion without backlash, so torsionally rigid inside the prestressing load. The prestressed elastomer’s surface is sufficiently wide to induce a low contact pressure on the tooth of the same elastomer, reducing permanent deformations and promoting a long life.
Atex conformity
The GAS/SG coupling can be supplied in accordance to directive 94/9/CE ATEX, which is relevant to protection apparatus and systems for use in potentially explosive spaces.
The dimensions of this coupling’s version are not different from the standard version.
A mark relevant to the coupling’s performances is printed on the hubs. It is necessary to consider planned tests, like those in the use and maintenance manual supplied together with each ATEX coupling.
The elastomeric elements used can be:
> Red elastic element in polyurethane, 98 Shore-A : II 2 G D c T6 -20≤Ta≤+60°C X U.
> Yellow elastic element in polyurethane, 92 Shore-A : II 2 G D c T5 -20≤Ta≤+80°C X U.
