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-pressure industrial pipeline systems.
The trunnion-mounted ball design reduces operating torque and provides stable sealing performance under high differential pressure conditions, making it suitable for automated process systems requiring reliable remote operation.

Engineering Design Overview

Trunnion-Mounted Ball Structure
Compared with floating ball valves, the trunnion design supports the ball at both upper and lower trunnions, providing mechanical stability during operation.
Engineering benefits:

Reduced operating torque (independent of line pressure influence)
Controlled seat loading for consistent sealing performance
Reduced wear in high-cycle operation
Improved stability under large diameter and high-pressure conditions

Typical applications include:

High-pressure pipelines
Gas transmission systems
LNG transfer and storage systems
Automated refinery process lines

Forged Steel Body Construction
The valve body is manufactured using forged steel to improve structural integrity and long-term reliability under cyclic pressure conditions.
Material options:

ASTM A105 (carbon steel)
ASTM A350 LF2 (low temperature service)
ASTM A182 F316 / F316L (corrosion resistant)
Duplex Stainless Steel (optional for severe service)

Engineering advantages:

Improved grain flow alignment under forging process
Reduced internal porosity compared to casting
Enhanced fatigue resistance under cyclic loading
Stable mechanical performance across production batches

Technical Specification Summary

Parameter	Specification
Size Range	DN50 – DN1200 (2" – 48")
Pressure Rating	Class 150 – Class 2500 (PN16 – PN420)
Design Standards	API 6D / ASME B16.34 / ISO 17292
Fire Safe Design	API 607 / API 6FA
End Connections	RF / RTJ / BW
Temperature Range	-46°C to +450°C (material dependent)
Mounting Standard	ISO 5211
Leakage Class	API 598 / ISO 5208 Class A (optional configuration)

Electric Actuator Integration

01/

System
The valve is designed for direct integration with industrial electric actuators and automation systems.

02/

Compatible actuator brands
Rotork
AUMA
Bernard Controls
Equivalent IEC/ISO compliant actuators

03/

Control & communication options
4–20mA analog control
HART communication
Modbus RTU / TCP
Profibus (optional)

04/

Functional features
ISO 5211 direct mounting interface
Real-time valve position feedback
Torque monitoring and protection
Configurable fail-safe modes (fail-open / fail-close / fail-in-place)

Sealing, Fire Safety & Integrity Design

Fire-Safe Performance (API 607 / API 6FA)
The valve is designed to maintain sealing integrity under fire exposure conditions through:

Metal-to-metal secondary sealing structure
Graphite-based high-temperature stem packing
Fire-tested seat design configuration (optional certification)

Blowout-Proof Stem & Anti-Static Design

Internal shoulder stem retention design prevents stem ejection
Anti-static grounding between ball, stem, and body
Bidirectional sealing with pressure-assisted seats

Leakage Performance
Depending on configuration, the valve can meet:

API 6D shutoff requirements
ISO 5208 Class A (zero visible leakage standard)

Testing & Quality Assurance

Each valve is tested prior to shipment under controlled factory conditions.
Standard testing:

Hydrostatic shell test: 1.5 × rated pressure
Seat leakage test: API 598 / API 6D
Functional cycle test for actuator assembly
Torque verification for actuator sizing

Application Experience

This valve type has been widely applied in industrial automation and pipeline systems including:

Middle East crude oil transmission pipeline projects
Southeast Asia LNG receiving terminals
European petrochemical plant isolation systems
Industrial gas distribution networks with SCADA integration

Engineering Selection Guidance

For correct valve selection, the following parameters must be confirmed:
Operating pressure and temperature
Flow medium (gas / oil / LNG / corrosive service)
Required leakage class (API 6D / ISO 5208)
Actuator torque requirement and control mode
Fire-safe or sour service requirement (NACE MR0175 / ISO 15156)

Optional engineering support:
Torque sizing calculation support
Cv value estimation (on request)
Actuator matching recommendation

Procurement Advantages

Lifecycle Cost Optimization

Reduced torque requirement lowers actuator specification cost
Improved seat durability reduces maintenance frequency
Suitable for long-cycle automated operation

Automation Compatibility

Compatible with global DCS/SCADA systems
Supports industrial communication protocols
Suitable for retrofit and new installations

Delivery & Inspection Options

Standard manufacturing lead time available upon request
Factory acceptance test (FAT) available
Third-party inspection supported (SGS / BV / DNV)