Products
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.
The top-entry design allows internal maintenance and inspection by removing the bonnet without removing the valve body from the pipeline. This configuration is widely used in oil & gas transmission, LNG terminals, refineries, and offshore facilities, where shutdown costs are significant.
Company & Manufacturing Capability
To ensure consistent quality and global project compliance, our valves are manufactured under a controlled industrial quality system.
- Manufacturing system: ISO 9001 certified production facility
- Product standard compliance: API 6D design & manufacturing capability
- Testing standard: API 6D / API 598
- Export markets: Middle East, Southeast Asia, Europe, South America
- Production capability: Forged steel valves for high-pressure Class 150–2500 service
- Quality documentation: EN 10204 3.1 / 3.2 MTC available for all shipments
Technical Specification Overview
|
Parameter |
Specification |
|
Size Range |
2" – 24" (DN50 – DN600), up to 48" available upon request |
|
Pressure Class |
ASME Class 150 / 300 / 600 / 900 / 1500 / 2500 |
|
Design Standard |
API 6D / ASME B16.34 |
|
Body Materials |
ASTM A105, A350 LF2, A182 F304/F316, F51, F53 |
|
Trim Materials |
F304, F316, Duplex F51, Inconel 625 overlay (optional) |
|
Seat Type |
Soft seat (PTFE / PEEK / Devlon) or metal-to-metal |
|
End Connections |
RF / RTJ Flanged, Butt-Weld (BW) |
|
Fire Safe Design |
API 607 / API 6FA |
|
Sour Service |
NACE MR0175 / ISO 15156 compliant |
Engineering Features & Performance Benefits
1. Top Entry Design – Reduced Maintenance Downtime
The top-entry structure allows internal components (ball, seats, stem, seals) to be serviced without removing the valve body from the pipeline.
Operational advantages:
- In-line maintenance capability
- Reduced pipeline shutdown time
- Suitable for buried, offshore, or hard-to-access installations
2. Forged Steel Body – High Structural Reliability
The valve body is manufactured from forged steel materials such as A105, LF2, or stainless steel grades.
Compared with cast construction:
- Improved grain structure integrity
- Higher resistance to fatigue and pressure cycling
- Reduced risk of internal porosity defects
3. Trunnion Mounted Ball – Stable Operation Under High Pressure
The trunnion-supported ball design transfers hydraulic load directly to the valve body.
Benefits:
- Lower operating torque
- Reduced actuator size requirement
- Stable performance in large-diameter pipelines
4. Spring-Loaded Seat System – Reliable Sealing Performance
The valve uses mechanically energized seats to maintain consistent sealing contact.
- Maintains sealing under pressure fluctuations
- Bidirectional sealing capability
- Designed in accordance with API 6D leakage requirements
5. Fire Safe & Sour Service Design
This valve is suitable for demanding hydrocarbon environments:
- Fire-tested in accordance with API 607 / API 6FA
- Designed for H₂S environments per NACE MR0175 / ISO 15156
- Controlled hardness materials to resist sulfide stress cracking
Quality Assurance & Testing
Each valve is subject to strict inspection and testing procedures:
Hydrostatic shell and seat testing (API 6D / API 598)
100% non-destructive testing (UT / MT / PT as required)
Dimensional inspection before shipment
Full traceability with EN 10204 3.1 / 3.2 material certificates
Visual inspection and pressure test reports included per project requirement
Typical Project Applications
This valve is widely used in international EPC and industrial projects, including:
Oil & gas transmission pipelines
LNG receiving and storage terminals
Refinery processing units
Petrochemical plants
Offshore platforms and subsea pipeline systems
High-pressure industrial fluid systems
Project Experience
Our top entry trunnion ball valves have been supplied for:
Natural gas transmission pipeline projects in the Middle East
LNG terminal valve packages in Southeast Asia
Petrochemical refinery upgrades in Europe
Offshore platform installations in South America
Commercial & Delivery Information
To support EPC and distributor requirements:
|
Standard delivery time |
30–90 days depending on specification |
|
Packaging |
Export-grade seaworthy plywood cases |
|
Inspection |
Third-party inspection available (SGS / BV / TUV upon request) |
|
Warranty |
12–24 months depending on project agreement |
|
Supply terms |
FOB / CIF / EXW available |
Frequently Asked Questions
Q: What is the advantage of a top entry ball valve?
A: It allows internal maintenance without removing the valve from the pipeline, significantly reducing downtime and maintenance cost.
Q: Why use forged steel instead of cast steel?
A: Forged steel provides better structural integrity, higher fatigue resistance, and reduces internal defects such as porosity.
Q: Is this valve suitable for automation?
A: Yes. The trunnion-mounted design reduces operating torque, enabling smaller actuator selection.
Q: Can it be used in sour gas service?
A: Yes. It complies with NACE MR0175 / ISO 15156 for H₂S-containing environments.
Q: What documents are provided?
A: We provide inspection reports, NDT records, hydro test reports, and EN 10204 3.1 / 3.2 certificates.
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