OFT Ex-proof pumps are projected following strict security requirements to guarantee safe operations in explosive atmospheres and to protect environmental safety. These situations of hazardous areas can be verified mainly in industrial processes, where they can be produced chemical reactions or where the liquids to be pumped are inflammable (hydrocarbons) and they can generate explosions even at ambient temperature. Landfills, even if not industrial productive, cannot be excluded as in those plants are produced and eliminated dangerous waste producing leachate that, consequently, can become biogas.