Forged Steel Trunnion Ball Valve
Forged Steel Trunnion Ball Valve
API 6D Industrial Valve for High-Pressure Pipeline Isolation Systems
Forged Steel Trunnion Ball Valves are engineered for high-pressure, large-diameter, and continuous-duty pipeline systems requiring stable shut-off performance, low operating torque, and long service life.
The trunnion-mounted design mechanically supports the ball at both upper and lower positions, transferring line pressure loads to the bearings rather than the seat rings. This structure ensures stable sealing performance under fluctuating pressure conditions while maintaining predictable operating torque.
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![High Temperature Forged Steel Trunnion Ball Valve]()
High Temperature Forged Steel Trunnion Ball Valve
Compared with cast steel ball valves, this product uses a forged steel valve body, which improves structural density and reduces internal casting defects such as porosity, shrinkage cavities, andAdd to Inquiry -
![Electric Actuated Forged Steel Trunnion Ball Valve]()
Electric Actuated Forged Steel Trunnion Ball Valve
The Electric Actuated Forged Steel Trunnion Ball Valve is designed for critical isolation and control service in oil & gas transmission, LNG facilities, petrochemical plants, and high-pressureAdd to Inquiry -
![Side Entry Forged Steel Trunnion Ball Valve]()
Side Entry Forged Steel Trunnion Ball Valve
The forged steel trunnion mounted ball valve is engineered for critical isolation service in oil & gas transmission pipelines, LNG facilities, refineries, and petrochemical plants.Add to Inquiry -
![Top Entry Forged Steel Trunnion Ball Valve]()
Top Entry Forged Steel Trunnion Ball Valve
The Top Entry Forged Steel Trunnion Ball Valve is engineered for high-integrity pipeline systems where safe operation, reduced downtime, and long service life are essential.Add to Inquiry -
![Fire Safe Forged Steel Trunnion Ball Valve]()
Fire Safe Forged Steel Trunnion Ball Valve
The Fire Safe Forged Steel Trunnion Mounted Ball Valve is engineered for critical isolation service in Oil & Gas, LNG, refinery, petrochemical, and offshore applications, where zero leakage, fireAdd to Inquiry -
![High Pressure Forged Steel Trunnion Ball Valve]()
High Pressure Forged Steel Trunnion Ball Valve
The High Pressure Forged Steel Trunnion Mounted Ball Valve is engineered for critical isolation service in high-pressure, high-temperature, and severe operating environments such as oil & gasAdd to Inquiry
Engineering Design Principle
Trunnion-Mounted Ball Structure
The ball is fixed by upper and lower trunnion supports, which provide mechanical stabilization during operation.
Engineering Function
Line pressure is absorbed by trunnion bearings
Seat load remains independent of pipeline pressure
Torque remains stable across operating conditions
Engineering Application Value
This design is particularly suitable for:
High-pressure pipelines (Class 300–2500)
Large-diameter systems (DN200 and above)
Automated and frequent cycling operations
Forged Steel Body Construction
Forged steel is selected for safety-critical pipeline applications due to its superior mechanical integrity compared to cast steel.
Manufacturing Process Advantages
Directionally aligned grain structure improves mechanical strength
Eliminates internal porosity and shrinkage defects found in casting
Higher fatigue resistance under pressure cycling
More consistent mechanical properties across production batches
Engineering Application Range
Forged steel valves are widely used in:
High-pressure gas transmission systems
Crude oil trunk pipelines
Thermal cycling and surge pressure environments
Sour service (NACE MR0175 optional compliance available)
Stable Low Operating Torque
Trunnion structure reduces seat loading, enabling:
- Lower actuator torque requirements
- Reduced actuator sizing cost (pneumatic/electric/hydraulic)
- Stable automation performance in ESD systems
Bi-Directional Sealing
Designed for both flow directions, reducing installation constraints and pipeline engineering complexity.
Spring-Loaded Seat System
Maintains consistent sealing contact under:
- Pressure variation
- Thermal expansion and contraction
- Long-term wear conditions
Leakage Performance
Design available to meet:
- ISO 5208 leakage class (up to Class V/VL depending on seat material)
- API 6D low leakage requirements
Technical Specification Range
|
Item |
Specification |
|
Size Range |
DN50 – DN1200 (2" – 48") |
|
Pressure Class |
ASME Class 150 – 2500 |
|
Body Material |
ASTM A105 / A350 LF2 / A182 F304 / F316 |
|
Design Standard |
API 6D / ASME B16.34 |
|
Testing Standard |
API 598 |
|
Face-to-Face |
ASME B16.10 |
|
End Connection |
RF / RTJ / BW |
|
Fire Safe Design |
API 607 / API 6FA (optional) |
|
Operation |
Lever / Gear / Electric / Pneumatic |
Quality Assurance & Certification System
Each valve is manufactured under strict quality control procedures to ensure full traceability and batch consistency.
Inspection & Testing
100% hydrostatic shell and seat testing (API 598)
Non-destructive testing (MPI / UT) on forged components (as required)
Dimensional inspection for every production batch
Pressure test records retained for quality traceability
Material Certification
Each shipment includes:
EN 10204 3.1 Mill Test Certificate (MTC)
Chemical composition report
Mechanical property test report
To support global EPC and distributor supply chains, production is organized under controlled manufacturing systems.
Production Capability
- Forged steel body production with controlled heat treatment
- CNC machining for high-precision dimensional control
- Standardized assembly line for batch consistency
- ISO 9001 quality management system implementation
Supply Reliability
- Stable production scheduling for bulk orders
- Framework agreement support for distributors
- Export-standard packaging (wooden case / pallet)
- Batch traceability system for inventory management
Export Experience
Products are supplied to:
- Middle East oil & gas projects
- Southeast Asia refinery expansions
- European industrial utility systems
- South American pipeline infrastructure
Typical Engineering Applications
Crude oil transmission pipelines (Class 600–2500 systems)
Natural gas distribution networks
Refinery process isolation systems
Gas compression and metering stations
Emergency shutdown (ESD) pipeline isolation loops
High-pressure water injection systems
Procurement Information
To support quotation and project procurement, the following information is available:
Commercial Terms
MOQ: Negotiable based on size and specification
Delivery Time: Based on order volume and configuration
Price Terms: EXW / FOB / CIF available
Payment Terms: T/T or LC acceptable (project-based)
Customization Options
Material grade (carbon steel / stainless steel / low-temp steel)
Trim options (anti-corrosion / wear-resistant configurations)
End connection (RF / RTJ / BW)
Actuator compatibility (ISO 5211 mounting standard)
Packaging
Export-grade wooden case
Sea freight pallet packaging
Anti-corrosion protection for long-distance shipping
FAQ
As one of the leading forged steel trunnion ball valve manufacturers and suppliers in China, we warmly welcome you to wholesale high-grade forged steel trunnion ball valve for sale here from our factory. All our products are with high quality and competitive price.
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