NACE MR0175 Valves for Corrosion Resistance in Sour Gas Environments Like H2S Applications
Bray Series 20/FS20 one-piece reduced port threaded ball valves deliver exceptional reliability in harsh industrial applications such as oil and gas, with NACE MR0175 compliance for corrosive and sour gas (H₂S) environments. The FS20 variant also offers API 607 Fire-Safe certification.
Constructed from investment cast stainless steel, the one-piece body minimizes leak paths and allows easy maintenance by simplifying seat and seal replacement, extending valve service life.
Both models feature a bottom-entry blowout-proof stem and live-loaded, self-adjusting stem seals that maintain low torque and high cycle life despite temperature or wear changes.
The S20 uses RPTFE seats and seals, vinyl-coated stainless steel latch handles, and is fully NACE MR0175 compliant.
The FS20 features FPTFE seats, graphite stem and body seals, an anti-static device, and a metal-to-metal backup seal that maintains shutoff even after seat damage in fire conditions.
An optional oval handle is available for operator preference.
Specification / Detail
| Size Range | ¼ - 2" (8 - 50mm) |
| Body Materials | ASTM A351 Gr CF8M |
| Temperature Range | -50°F to 450°F (-46°C to 232°C) |
| Maximum Allowable Operating Pressure | 2000 psi WOG (137 Bar) |
| Seat Materials | RPTFE |
| Shutoff Rating | Zero Leakage |
| Ball Materials | ASTM A351 Gr CF8M |
| Body Style | One Piece |
| Design Standard | MSS SP-110 |
| End Connections | Threaded - NPT |
| Testing Standard | MSS-SP 72 |
| Certifications | API607 7-th Edition, NACE MR0175 |
| Ports | Reduced Port |
| Face to Face | Manufacturers Standard |
| Applications | General Service, Air, Water, Oil & Gas, Fire Safe |