Expert: Reza Foudazi - 9/7/2007

Question
QUESTION: what types  flanges  and  sealings  materials used in oil tanks?

ANSWER: Dear Sir,
Oil resistant sealing and flanges used in oil tanks. The material is a cured elastomer based on:
- Flouro-elastomer
- NBR (acrilonitril butadien rubber)
and etc. the material depend on the oil and operational conditions, but usually above mentioned materials are used.
regards,
Reza

---------- FOLLOW-UP ----------

QUESTION:  what type of oil sealings used in  tandom master cylinder , drum brake  and  disc brake?

Answer
Dear Sir,
The materials used are those I sent before. It depends on the manufacturer, but the main important point is the formulation of their compounds. For example, we may have 3 or 4 NBR sealings which have different sealing pressure and therefore application.