Technical brochure for the Pietro Fiorentini HBC 975 slam shut valve, a safety device for interrupting gas flow in high and medium-pressure networks.
The Pietro Fiorentini HBC 975 is a safety device designed to quickly interrupt gas flow when pressure reaches a set value. It is primarily used in high-pressure transmission systems and medium-pressure gas distribution networks, suitable for natural gas, oil, hydrogen, and biomethane applications.
Key features include a response time within 1 second, a top-entry design for easy maintenance without removing the valve body from the pipework, and the ability to retrofit existing pressure regulators. The valve can be tripped automatically, locally via a button, or remotely via system monitoring.
| Design pressure | up to 10.2 MPa |
|---|---|
| Ambient temperature range | from -20 °C to +60 °C |
| Inlet gas temperature range | from -20 °C to +60 °C |
| Maximum inlet pressure | 10 MPa |
| Accuracy class | up to 2.5 |
| Over pressure setting range | from 0.02 MPa to 9 MPa |
| Under pressure setting range | from 0.02 MPa to 9 MPa |
| Nominal dimensions | DN 100 / 4” to DN 300 / 12” |
| Body material (ANSI 300/600) | Cast steel ASTM A 352 LCC |
| Body material (ANSI 150/PN 16) | Cast steel ASTM A 216 WCB |
| Stem material | AISI 416 stainless steel |
| Construction standard | EN 14382 |
The valve ensures tripping within 1 second.
It can be tripped automatically when the set-point is exceeded, locally by pressing a button, or remotely via system monitoring.
The restoration of normal operating conditions is carried out in a purely manual manner after verifying and solving the causes of tripping.
Yes, its modular design allows retrofitting on existing pressure regulators in the field without piping modifications.