Trunnion Ball Valve, 3-1/8 in × 5M Flanged, 5,000 psi, Sour Service

The Trunnion Ball Valve, 3-1/8 in × 5M Flanged, 5,000 psi, Sour Service is a ball — trunnion ball valve rated for 5,000 psi working pressure with 3-1/8 in API 6A 5M Flanged (RTJ) inlet and 3-1/8 in API 6A 5M Flanged (RTJ) outlet. NACE MR0175 / ISO 15156 sour-service compliant — H₂S-rated trim and elastomers.

Construction

• Type: Ball — Trunnion
• Nominal size: 3-1/8 in
• Bore: Full Port
• Body material: Forged AISI 4130 — NACE-compliant
• Trim material: 410SS ball + Inconel-625 overlay seats
• Seal / elastomer: PEEK back-up + HNBR primary seals
• Inlet: 3-1/8 in API 6A 5M Flanged (RTJ)
• Outlet: 3-1/8 in API 6A 5M Flanged (RTJ)

Performance

Working pressure 5,000 psi (5K class). Manufactured to API 6A, PSL 3, PR1. Service class: Sour (NACE MR0175).

Applications

• Wellhead production trees (sour)
• Christmas-tree side-outlet valves
• 5K wellhead manifold blocks
• Subsea-adjacent surface equipment

Compliance

• API 6A
• Material class: PSL 3
• Performance requirement: PR1
• NACE MR0175 / ISO 15156 (sour-service)

How to order

Confirm (a) line pressure rating and pressure class, (b) inlet and outlet end-connection sizes / styles, (c) service class (sour vs standard), (d) bore preference (full vs reduced port), and (e) any temperature, fugitive-emissions, or fire-safe certification requirements. Indus quotes ex-Dubai with full mill test reports, API monogram traceability where applicable, and pre-shipment hydrostatic / shell test certificates.

Companion products

Pair with matched-pressure check valves, plug valves, and flow-iron unions of the same end-connection family. For wellhead service, also specify gate valves and surface safety valves of the equivalent API 6A pressure class. For frac applications, the 1502, 602, and 206 Weco unions are the most common matched standards.