NPS 34" Class 600 BW API Standard Fully Welded Ball Valve – A105
NPS 34" Class 600 BW API Standard Fully Welded Ball Valve – A105 - Image 2
NPS 34" Class 600 BW API Standard Fully Welded Ball Valve – A105 - Image 3

NPS 34″ Class 600 BW API Standard Fully Welded Ball Valve – A105

NPS 34″ Class 600 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.

Technical Specifications
Size NPS 34"
Pressure Class Class 600
Body Material A105
Connection End BW
SKU: AFWBV-600-A105-34-BW Category: Tags: , , , ,

Description

The NPS 34″ Class 600 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 600 | A105 | BW Ends | API 6D

  • Face-to-Face Length (L_BW): 1930 mm (ASME B16.10 / API 6D)
  • Assembly Center-to-Top Height (H1): 1070 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.

Trim Metallurgy & High-Integrity Sealing System

  • Body Material Specification: Heavy-duty forged ASTM A105 carbon steel delivering superior structural density and high tensile strength. Engineered specifically for standard buried natural gas transmission lines, city district heating networks, and oil gathering manifolds where maximum pressure boundary integrity is critical.
  • Double Piston Effect (DPE) Seats: Spring-energized floating seats utilize pipeline pressure to guarantee bidirectional bubble-tight isolation. Self-relieving upstream seat configurations are also available upon request.
  • Trunnion-Mounted Plated Ball: Heavy-duty trunnion bearings absorb extreme pipeline thrust, ensuring consistently low operating torque.
  • Anti-Blowout Stem & Low Emission Packing: Triple-sealed stem architecture prevents blowout and complies with ISO 15848-1 Class AH and German TA-Luft fugitive emission standards.
  • Emergency Sealant Injection: Built-in injection fittings allow emergency sealant deployment to the stem and seat areas to quickly resolve accidental seal damage.

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.
Gute Valve Quality Inspection Process

Frequently Asked Technical Questions

Q: What is the operational advantage of factory-welded Transition Pups?

A: Transition pups are customized pipe extensions welded to the valve ends prior to field shipment. During site installation, the heat generated by butt-welding the valve directly into the pipeline can transfer to and degrade internal soft seats (PTFE, Nylon, or PEEK). The pups serve as a thermal buffer zone, dissipating welding heat and allowing fast, safe field welding without valve disassembly.

Q: How does the Double Piston Effect (DPE) seat mechanism guarantee bidirectional isolation?

A: The double piston seat design utilizes both upstream line pressure and internal body cavity pressure to force the seat rings tightly against the trunnion-mounted ball. If the primary upstream seat is compromised by debris or scale, the downstream seat provides a redundant, pressure-energized secondary seal, maintaining absolute zero-leakage shutoff in high-pressure transmission networks.

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.

Proven in Severe Service: See how Gute's engineered flow equipment operates in major global applications in our Industrial Project References or explore technical selection criteria and material standards in our Technical Knowledge Base.

Additional information

Material

Pressure

Valve Size

Connection

Design Standard

API Standard
Size

NPS 34"
Pressure Class

Class 600
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)

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