Floating
model H21 (Hydrogen)
Model H21 is the floating ball valve of the Valland hydrogen range, covering small bore duties from 1/2" to 8" in pressure classes ANSI 150 to 1500. Like the H11, it is built exclusively in hydrogen-compatible materials (UNS S31600/S31603, UNS S31254, UNS S20910, UNS S66286) with special gaskets to avoid contamination from the environment, anti-blowout stem and antistatic device.
The H21 is the typical choice for electrolyzer balance-of-plant lines, refueling station piping and hydrogen utility services. Seventy Valland hydrogen ball valves (models H11 and H21) were supplied to NEL Hydrogen for the M4000 Iberdrola project, with deliveries between 8 and 19 working weeks.
| Applicable standards | API 6D Design according to ASME B16.34 or ASME VIII Div. 1 & 2 |
| Pressure Class Range | ANSI Class 150 lbs. to 1500 lbs. |
| Size Range | API 6D - from 1/2" to 8" |
| Ends design | Flanged (RF/RTJ) - ASME B16.5, ASME B16.47 or MSS SP-44 Compact (i.e. Norsok Standard L-005) Butt-Weld (ASME B16.25) and/or Butt-Weld + Pipe Hubbed according to client Clamp Special client's requirements |
| Body Design | Two Pieces |
| Closure Design | Bolted Closure or Fully welded |
| Seat design | Soft Sealing - Metal to Metal (c/w hardfacing) |
| Valve operation | Manual: Lever or Gearbox |
| Available Materials | UNS S31600/3, UNS S31254, UNS S20910 and UNS S66286. Proper material selection verifed by Valland material experts. NACE MR0175 according to client request. |
| Additional Features | Anti Blowout Stem, Antistatic Device Special gasket to avoid contamination from environment |
| Testing and Certification | Testing: High Pressure Gas, Pneumatic and Functional Test in hydrogen environment according to client specifications API 598 - API 6D Fire testing: API 6FA, API 607, BS 6755 part 2, ISO 10497 Fugitive Emission Test: ISO 15848 - 1 & 2 SIL Certificate up to SIL 3 TR-CU PED 2014/68/UE Mod.H - UKCA - TSG (upon request) |
