NPS 34″ Class 400 BW API Standard Fully Welded Ball Valve – A105
NPS 34″ Class 400 BW API Standard Fully Welded Ball Valve – A105. Integrally forged body, zero fugitive emissions. Engineered for direct burial underground pipelines with optional transition pups and extended stem.
Description
The NPS 34″ Class 400 BW API Standard Fully Welded Ball Valve – A105 engineered by XIAMEN GUTE VALVE MANUFACTURING COMPANY is the ultimate heavy-duty flow isolation solution for natural gas transmission, city district heating networks, and high-pressure oil gathering pipelines. Featuring an integrally welded forged body, it completely eliminates bolted body joints and potential leak paths, guaranteeing zero fugitive emissions and robust resistance to pipeline bending moments and soil settlement.
Engineering Configuration & Dimensional Data
NPS 34″ | Class 400 | A105 | BW Ends | API 6D
- Face-to-Face Length (L_BW): 1778 mm (ASME B16.10 / API 6D)
- Assembly Center-to-Top Height (H1): 1043 mm
- End Connection: Butt-Weld (BW) per ASME B16.25
- Actuation Interface: Heavy-Duty Enclosed Worm Gearbox (Underground Extension Available) (ISO 5211 direct mounting pad configured)
- Bore Configuration: Full Bore (Piggable for intelligent pipeline inspection tools)
Core Structural Innovation: Underground Buried & Pipeline Service Design
Engineered specifically for direct burial and remote pipeline installations, eliminating the need for expensive underground concrete valve vaults.
- Transition Pups Ready: Optional customized transition pup pieces can be factory-welded to the valve ends to prevent soft seat thermal degradation during field butt-welding.
- Extended Stem Configuration: For buried applications, an optional extended stem elevates the operator mechanism and all auxiliary lines (vent, drain, sealant injection) securely to ground level.
- Zero Maintenance Envelope: The spherical, seam-welded forged envelope requires absolutely no body maintenance throughout its operational lifespan.
Rigorous Quality Assurance & API 6D Inspection Protocols
- 1. Fully Welded Joint NDE: 100% Volumetric Ultrasonic Testing (UT) and Radiographic Testing (RT) on all primary structural body welds.
- 2. Hydrostatic Shell & Seat Testing: High-pressure liquid shell test (1.5x CWP), high-pressure seat closure test (1.1x CWP), and DBB cavity integrity verification per API 6D.
- 3. Fire-Safe Certified Construction: Fire-tested and qualified in strict compliance with API 607 (7th Edition) and API 6FA.
Frequently Asked Technical Questions
A: Unlike standard bolted-body valves, the fully welded spherical body completely eliminates body flanges, bolting, and gaskets. This creates a zero-leakage pressure boundary that is immune to external piping bending moments, extreme soil settlement, and thermal stress fluctuations found in buried pipeline applications, delivering reliable maintenance-free operation for decades.
A: For valves buried deep underground, the extended stem elevates the operating mechanism (gearbox or automated actuator) and all auxiliary connections—including the body cavity vent, bottom drain, and emergency sealant injection lines—to ground level. This allows operators to perform routine switching and maintenance without entering hazardous confined underground vaults.
Need Underground Extension or Transition Pups Sizing?
Contact Gute Valve engineering team for certified dimensional drawings, automated actuator sizing packages, or tailored transition pup lengths for your specific pipeline wall thickness.
Additional information
| Material | |
|---|---|
| Pressure | |
| Valve Size | |
| Connection | |
| Design Standard | API Standard |
| Size | NPS 34" |
| Pressure Class | Class 400 |
| Body Material | A105 |
| End Connection | BW |
| Operation | Heavy-Duty Enclosed Worm Gearbox (Underground Extension Available) |
| Special Configuration | Transition Pups & Underground Stem Extension Ready |
| Manufacturer | XIAMEN GUTE VALVE MANUFACTURING COMPANY |
| Trim / Internals | API 6D Trim (Trunnion Ball + Spring-Energized DBB Seats) |
