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Pietro Fiorentini direct-operated gas pressure regulators for high-pressure transmission systems and medium pressure natural gas distribution networks. Diaphragm-controlled with Fail Open behaviour. Dival 160 AP, Staflux 187 and ATF 15 are marked Hydrogen Ready for NG-H2 blending — see the H2 Ready column below. For other models, contact us to confirm hydrogen suitability.
| Model | Size | Design Pressure | Inlet Pressure | Outlet Pressure | H2 Ready | Quote | |
|---|---|---|---|---|---|---|---|
| Dival 160 AP | 1" | 85 bar | 1.4 – 85 bar | 0.85 – 4.5 bar | H2 Ready | Request Quote | |
| Staflux 185 | 1", 2", 3" | Up to 100 bar | 2 – 85 bar | 1 – 75 bar | On request | Request Quote | |
| Staflux 187 | 1" | Up to 250 bar | 2 – 250 bar | 1 – 75 bar | H2 Ready | Request Quote | |
| ATF 15 | See connections | Up to 220 barg | 2 – 250 barg | 1.5 – 60 barg | H2 Ready | Request Quote | |
A gas pressure regulator reduces a higher, variable inlet pressure to a steady outlet pressure for the equipment downstream. In a direct-operated regulator the outlet pressure acts on a diaphragm that is balanced against a spring or counter-pressure, moving the valve plug without a separate pilot. That makes the design compact and quick to respond. All four Pietro Fiorentini models here are direct operated, fail open, rated for -20°C to +60°C, with accuracy class up to AC 5 and lock-up class up to SG 10.
Dival 160 AP is a 1" regulator for inlet pressures of 1.4 to 85 bar and outlet pressures of 0.85 to 4.5 bar. Staflux 185 comes in 1", 2" and 3" sizes with 2 to 85 bar inlet and 1 to 75 bar outlet. Staflux 187 handles inlet pressures up to 250 bar with ASME B16.5 Class 1500 flanges. ATF 15 is a compact spring-loaded unit with 1" NPT and Rp 1/4" connections and an anti-freeze design, used for instrument gas, actuator supply and pilot feeding.
Dival 160 AP, Staflux 187 and ATF 15 are listed as hydrogen ready for natural gas and hydrogen blends.
