Integral DBB & DIB Trunnion Mounted Ball Valves-Trust Valve (JiangSu) Co.,Ltd.

Integral DBB & DIB Trunnion Mounted Ball Valves

High-Performance Isolation for Critical Pipeline Systems

"API 6D Certified. Zero Leakage. Trust Valve—Trunnion Strength for High-Pressure Flow."

INQUIRY

Trunnion-Mounted Ball: The spherical ball is supported by upper (stem-connected) and lower trunnions, eliminating axial movement under high pressure. This design reduces seat wear and ensures stable operation in large-diameter (≥4") or high-pressure (≥Class 600) systems.
Floating Seats with Spring Loading: Two spring-loaded seats (upstream/downstream) press against the ball, maintaining a tight seal even as pressure fluctuates. Seats are available in PTFE (for general service) or metal-to-metal (for high-temperature/high-abrasion applications).

Feature	Compliance & Benefit
Fire-Safe Design	Meets API 607/API 6FA standards: Metal backup seats prevent leakage during fire, ensuring safety in hydrocarbon service.
Anti-Blowout Stem	Stem is mechanically retained to prevent ejection under pressure, per API 6D’s safety requirements.
Low-Torque Operation	Hardened trunnion bearings and self-lubricating seats reduce friction, enabling easy actuation (manual, gear, or actuator-driven).
Bubble-Tight Shutoff	API 598 Class VI leakage rating (≤0.1 cc/min) for critical isolation in oil, gas, or chemical pipelines.
Corrosion Resistance	Materials: Carbon steel (WCB), 316L stainless steel, or duplex/super duplex stainless steel (for sour service, NACE MR0175 compliant).

Standard Trunnion Ball Valves

Sour Service Valves

Materials: 22Cr duplex or 25Cr super duplex stainless steel
Certified to NACE MR0175/ISO 15156 for H₂S-containing environments (up to 20,000 ppm H₂S).

Large-Diameter Valves

Temperature Range: -50°C to 380°C (-58°F to 716°F) (material-dependent).
Actuation Options: Manual handwheel, bevel gear, pneumatic (double-acting/spring-return), electric (rotary actuators).
Testing: Hydrostatic shell/seat tests (API 6D 7.6), gas leak tests, and optional Fugitive Emission testing (ISO 15848-1).

Oil & Gas Transmission: Mainline isolation, block valves in cross-country pipelines.
Offshore Platforms: Wellhead control, riser isolation, and subsea pipeline shutdown.
Refineries & Petrochemicals: High-pressure hydrocarbon processing, catalyst transfer lines.
LNG/LPG Facilities: Cryogenic-compatible variants (with extended bonnets) for low-temperature service.
Power Generation: Isolation in steam, fuel oil, or cooling water systems.

Quator Turn Valves