The Dival 500, manufactured by Pietro Fiorentini, is a direct-acting gas pressure regulator controlled by a diaphragm and opposing spring mechanism. It is suitable for use with pre-filtered gaseous fluids and is primarily employed in medium- and low-pressure natural gas distribution networks. It is classified as Fail Open according to European Standard EN 334.
The Dival 500 is Hydrogen Ready for NG-H2 mixtures.
Specifications
- Accuracy class AC: Up to 10; absolute up to 1% (depending on operating conditions)
- Nominal sizes DN: 1″ × 1″; 1″ × 1½″
- 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: −20…+60 °C
- Minimum differential pressure: 0.1 bar
- Downstream pressure range Wd: BP: 13–100 mbar; MP: 100–300 mbar; TR: 300–2500 mbar
- Inlet pressure range bpu: BP: (Pd + 0.1)–10 bar; MP and TR: (Pd + 0.1)–20 bar
