Dival 507-512 H


The Dival 507-512 H by Pietro Fiorentini are a lever-operated gas pressure regulators controlled by a diaphragm and contrasting regulated spring action. These devices are suitable for 100% hydrogen applications.

They are used for medium and low pressure gas distribution networks, as well as commercial and industrial applications.

According to the European Standard EN 334, they are classified as Fail Open.

Click here to see the product page in the NG version / NG-H2 blending (up to 20%) version.


  • Accuracy class AC: up to 10
  • Nominal sizes DN: 1″; 1″ 1/2
  • Lock-up pressure class SG: up to 20 (depending on version and set point)
  • Design pressure: up to 10 bar for BP, up to 20 bar for MP and TR
  • Design temperature: from -20 °C to +60 °C
  • Connections: threaded Rp EN 10226-1, NPT ASME B1.20.1
  • Minimum differential pressure: 0.1 bar
  • Range of downstream pressure Wd: from 15 to 110 mbar for BP, from 80 to 300 mbar for MP, from 300 to 3000 mbar for TR
  • Inlet pressure range: from (Pd + 0,1) bar to 10 bar from BP
    from (Pd + 0,1) bar to 20 bar for MP and TR


The configuration options can be compounded and aggregated differently. Please refer to the technical manual for all available combinations.
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