The impellers in our pumps are available in different materials according to the products to be treated. NEOPRENE (CR), the most versatile, is suitable for surfactants, glycols, soda, alcohol, hydrocarbons. DUTRAL (EPDM) is recommended for acids, NITRILE (NBR) for mineral oils and terpenes. White SILICONE is suitable for resins, hydrogen peroxide, phenols, soybean oil, olive oil, and is certified for use with food (FDA regulation 21 CFR 177.2600), as it is compliant with Directive 89/109 EEC and Regulation EC 1935/2004. These pumps are used to transfer fluids, semifluids and dense products. They are appreciated for being STRONGLY SELF-PRIMING (no need to fill the suction tube upon first use), REVERSIBLE (the direction of flow can be reversed) and easy to disassemble for quick, frequent maintenance. They are also practical to use in the wheeled version, with the electrical system,