1. Hot and cold clean, non flammable and explosive, containing no solid particles or fibers of the liquid, . 2. The liquid temperature: -15ºCto +70ºC hot water type +70ºC to +115ºC. 3. The environment temperature: +40ºC. 4. The minimum entrance pressure curve: NPSH +0.5m. 5. Head of safety margin of 0.5m.