Products
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.
It is designed for ASME Class 150–2500 high-pressure applications, where safety, zero-leakage performance, and long lifecycle reliability are essential for EPC contractors and operators.
Proven Application Experience
Our trunnion ball valves have been supplied for high-demand industrial applications, including:
- Cross-country natural gas transmission pipelines
- LNG liquefaction and regasification terminals
- Refinery hydrocracking and high-pressure isolation systems
- Offshore and onshore sour gas (H₂S) service projects
- Pigging systems and custody transfer metering stations
Design Standards & Third-Party Compliance
Our valves are designed and manufactured in strict accordance with international standards:
Design & Pressure
API 6D / ISO 14313
ASME B16.34
Testing & Fire Safety
API 598 pressure testing
API 607 / API 6FA fire-safe certified design (TÜV / BV witnessed)
Face-to-Face & End Connections
ASME B16.10
ASME B16.5 / B16.47 (RF / RTJ flanged ends)
ASME B16.25 (Butt-weld ends)
Quality Certification
ISO 9001 / ISO 14001 / ISO 45001
CE / PED compliance
EN 10204 3.1 / 3.2 full traceability
Third-party inspection: SGS / TÜV / BV / DNV available
Material & Environmental Compliance
NACE MR0175 / ISO 15156 (sour service)
ISO 15848-1 / API 641 (fugitive emissions)
Engineering Advantages
Forged Split Body Construction
Closed-die forging ensures uniform grain structure
Eliminates internal porosity and shrinkage defects
Higher resistance to thermal shock and cyclic pressure fatigue
Suitable for cryogenic (-196°C) and high-pressure service
Trunnion Mounted Ball System
Ball supported by upper and lower trunnions
Reduces seat load under differential pressure (ΔP)
Enables low operating torque and smaller actuator sizing
Extends service life in high-cycle pipeline applications
Side Entry Maintenance Design
Bolted body construction allows in-line maintenance
Seats, seals, and stem packing can be replaced without full pipeline removal
Reduces plant shutdown time and maintenance cost
Safety & Performance Features
Double Block and Bleed (DBB) capability for isolation verification
Bi-directional sealing (DPE / SPE seat design options)
Fire-safe metal sealing backup (API 607 compliant)
Anti-blowout stem design for high-pressure safety
Anti-static grounding system for explosion-proof environments
Fugitive emission control for environmental compliance
Material Selection
|
Service Condition |
Body Material |
Trim Material |
Seat Type |
Standards |
|
General Service |
ASTM A105 |
F316 / ENP |
PTFE / RPTFE |
API 6D |
|
Low Temperature / Cryogenic |
ASTM A350 LF2 |
F316 / 17-4PH |
PEEK / Metal Seat |
-196°C rated |
|
Sour Gas (H₂S) |
LF2 / Controlled Hardness Steel |
F316 / Duplex |
PEEK / Metal + Stellite |
NACE MR0175 |
|
Corrosive / Marine |
Duplex / Super Duplex |
Inconel 625 / Monel |
Hardfaced Metal Seat |
Project Spec |
Manufacturing Capability & Quality Control
Our production system includes CNC machining, forging, assembly, and testing under one controlled environment.
Manufacturing Capability
Size range: 2" – 48" (DN50 – DN1200)
Pressure class: ASME 150 – 2500
End connections: RF / RTJ / BW
Actuation: manual, gear, electric, pneumatic, electro-hydraulic
Quality Control (100% inspection system)
100% hydrostatic & pneumatic testing
Ultrasonic testing (UT) on forged bodies
Magnetic Particle / Dye Penetrant testing
Positive Material Identification (PMI)
Full traceability via EN 10204 3.1 / 3.2
Delivery & Commercial Terms
Standard delivery: 6–10 weeks (small to medium sizes)
Large diameter / high pressure: 10–16 weeks
Special alloys / EPC project: schedule based on engineering approval
Commercial terms:
EXW / FOB / CIF / CFR available
OEM / private labeling supported
Full export documentation package provided
Warranty:
18 months from shipment OR 12 months from installation
Frequently Asked Questions
Q: When should I use a trunnion ball valve?
A: For 4" and above sizes, and especially in Class 600+ high-pressure pipelines, trunnion designs reduce torque, improve sealing stability, and increase service life compared to floating ball valves.
Q: Why choose forged steel over cast steel?
A: Forging eliminates internal voids and improves grain structure alignment, resulting in:
Higher pressure resistance
Better fatigue performance
Increased safety in cryogenic and sour gas service
Q: Can you support EPC documentation requirements?
A: Yes. We provide full MDR packages including:
Material traceability (3.1 / 3.2 certificates)
Test reports
NDT reports
Third-party inspection certificates
Q: Do you support custom actuator integration?
A: Yes. We provide complete valve automation packages with:
Mechanical mounting
Calibration
Functional testing before shipment
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