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The Aperflux 851 is one of the pilot-operated gas pressure regulators designed and manufactured by Pietro Fiorentini. This device is suitable for use with previously filtered non-corrosive gases, and it is mainly used for high-pressure transmission systems and for medium pressure natural gas distribution networks.

According to the European Standard EN 334, it is classified as Fail Open. The Aperflux 851 is Hydrogen Ready for NG-H2 blending.

Technical Table