Description

TECHNICAL DATASHEET: FORGED STEEL 3-PIECE TRUNNION MOUNTED BALL VALVE

ITEM	SPECIFICATION / DESCRIPTION
Model	Q367F-150LB～900LB (API 6D Nomenclature)
Valve Type	3-Piece Trunnion Mounted Ball Valve
Design Standard	API 6D / API 607 / ASME B16.34
End Connection	Flanged (RF, RTJ, FF)
Flange Standard	ASME B16.5 / EN 1092-1 / ASME B16.47 Series B
Pressure Rating	ASME Class 150～900 / PN16～PN160
Body Material	Forged ASTM A105N (NACE MR0175 Compliant) Optional: A182 F304/F316/LF2/F51 Duplex
Ball Assembly	• Ball: SS316 + HVOF Stellite Coating (≥0.5mm) • Trunnion Shafts: A479 431 SS
Seat Material	Primary: RPTFE/PEEK Secondary Metal Seal: Inconel 718
Stem Material	Integral Forged Stem: 17-4PH H1150 (Hardened)
Stem Sealing	Live-loaded Graphite Packing (Fire-safe per API 607) + Wiper Seal
Operation	ISO 5211 Mounting Pad for Actuators (Manual/Gear/Pneumatic/Electric)
Sealing Direction	Double Piston Effect (DPE) Seats – Bidirectional
Seal Integrity	• Fugitive Emissions: ISO 15848-1 Class BH • Seat Test: API 598 VI / ISO 5208 A
Fire-Safe Design	API 6FA / API 607: Metal-to-Metal Seals + Fire-resistant Graphite
Anti-Static Design	API 6D: Spring-loaded SS Ball-Stem Contact (≤10Ω resistance)
Temp. Range	Standard: -29°C to +200°C Extended: -196°C (Cryo) / +550°C (Special Seals)
Media	Full Bore Design for: Crude Oil, Natural Gas, CO₂, Steam, Cryogenic Fluids
DBB Function	Double Block & Bleed (API 6D) with Body Vent/Relief Port
Testing	• Hydro Test: 1.5×PN • Gas Seat Test: 1.1×PN • Borescope Inspection Optional

TRUNNION MOUNTED ADVANTAGES

Mechanical Stability
- Ball rigidly supported by trunnion shafts, eliminating seat loading under high ΔP
- Operating torque 60% lower than floating ball valves at Class 600+
Sealing Reliability
- Dual-seal design: Soft primary seal + Inconel emergency metal seal
- Seat spring pre-load maintains contact during pressure/temperature cycling
Lifecycle Economy
- Replaceable seats/stems without valve removal (3-piece design)
- Anti-blowout stem per API 6D Sec. 6.3