Trunnion
model H11 (Hydrogen)
Model H11 is Valland’s trunnion mounted ball valve engineered for high-pressure gaseous hydrogen. It carries over the mechanical architecture of the A11 oil and gas valve — two-piece body, trunnion-supported ball, floating self-relieving or double piston effect seats, double block and bleed and DIB options — and replaces every pressure-containing and sealing material with hydrogen-compatible grades: UNS S31600/S31603, UNS S31254, UNS S20910 and UNS S66286, with the final selection verified by Valland material experts for the specific service conditions.
Typical H11 applications are electrolyzer skids, hydrogen compression and storage systems, refueling station process lines and hydrogen pipelines. Valves can be tested in hydrogen environment according to client specifications, and certified PED, UKCA, TR-CU and TSG (upon request), with SIL up to SIL 3.
| Applicable standards | API 6D Design according to ASME B16.34 or ASME VIII Div. 1 & 2 |
| Pressure Class Range | ANSI Class 150 lbs. to 4500 lbs. |
| Size Range | API 6D - from 1/2" to 42" |
| Ends design | Flanged (RF/RTJ) - ASME B16.5, ASME B16.47 or MSS SP-44 Flanged (6B/6BX) - API 6A 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 |
| Ball support | Trunnion (small sizes < 4") - Support Plates |
| Seat design | Floating Self-Relieving - Floating Double Piston Effect Soft Sealing - Metal to Metal (c/w hardfacing) |
| Valve operation | Manual: Lever or Gearbox Actuated: Pneumatic / Hydraulic / Electric / Electro-Hydraulic |
| Available Materials | UNS S31600/3, UNS S31254, UNS S20910 and UNS S66286. Proper material selection verified by Valland material experts. NACE MR0175 according to client request. |
| Additional Features | Double Block and Bleed, Double Isolation Barrier (DIB), 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 ModH - UKCA - TSG (upon request) |
