Forged Trunnion Ball Valve Manufacturer in Africa

For high-pressure or large-diameter pipelines, a forged trunnion ball valve is often used when the system needs tight shut-off with lower operating effort. The forged body gives the valve better strength and a more solid structure than a standard cast design, while the trunnion-mounted ball helps reduce torque during operation. As a Forged Trunnion Ball Valve Manufacturer in Africa, African Valve manufactures and supplies valves in different materials, pressure classes, end connections, and operating configurations for projects across Nigeria, Egypt, South Africa, Kenya, Ghana, and other African markets 

What Is a Forged Trunnion Ball Valve?

A Forged Trunnion Ball Valve is a quarter-turn isolation valve designed for high-pressure pipelines and critical industrial applications. Unlike a floating ball valve, the ball is mechanically supported by upper and lower trunnions, allowing the seats to move against the ball and create a secure seal. This design reduces operating torque and improves sealing performance under varying pressure conditions. Manufactured according to standards such as API 6D, API 608, ASME B16.34, and ISO 17292, these valves are commonly used for handling natural gas, crude oil, steam, water, LNG, chemicals, and other industrial process media.

How Does a Forged Trunnion Ball Valve Work?

The Forged Trunnion Ball Valve controls flow by rotating a precision-machined ball through 90 degrees between the open and closed positions. Since the ball is supported by trunnions, it remains stable while spring-loaded seats move towards it to provide dependable sealing. This arrangement lowers operating torque, minimizes seat wear, and improves valve performance during repeated operation. The forged steel body withstands pressure fluctuations, mechanical stress, and elevated temperatures, making the valve suitable for transmission pipelines, processing facilities, and other industrial systems requiring secure flow isolation.

Materials & Construction

The valve is manufactured using:

• Carbon Steel – ASTM A105

• Low Temperature Carbon Steel – ASTM A350 LF2

• Stainless Steel – ASTM A182 F304 / F316 / F316L

• Duplex Stainless Steel – ASTM A182 F51

• Super Duplex Stainless Steel – ASTM A182 F53

• Alloy Steel – ASTM A182 F11 / F22

Construction features include:

• Forged steel body construction

• Trunnion-mounted ball design

• Spring-loaded seats

• Blow-out proof stem

• Fire-safe and anti-static design

• PTFE, RPTFE, PEEK, or Metal Seated options

• Flanged, Butt Weld, Socket Weld, and Threaded end connections

• Lever Operated, Gear Operated, Pneumatic, Hydraulic, and Electric Actuated options

Technical Specifications

• Size Range: DN50 to DN1200 (2" to 48")

• Pressure Ratings: Class 150, 300, 600, 900, 1500, 2500

• Design Standards: API 6D, API 608, ASME B16.34, ISO 17292

• Testing Standard: API 598

• End Connections: Flanged, Butt Weld, Socket Weld, Threaded

• Operation: Lever Operated, Gear Operated, Pneumatic, Hydraulic, Electric

Industrial Applications

Forged Trunnion Ball Valves are widely used in:

• Oil & Gas

• Petrochemical

• Chemical Processing

• LNG Facilities

• Power Generation

• Mining

• Marine

• Water & Wastewater Treatment

• Infrastructure Projects

Product Features

• Forged steel body provides excellent mechanical strength

• Trunnion-mounted ball reduces operating torque

• Spring-loaded seats improve sealing performance

• Suitable for high-pressure and high-temperature applications

• Multiple material grades and actuation options available

• Manufactured according to international engineering standards

Manufacturing & Inspection

African Valve manufactures Forged Trunnion Ball Valves according to API 6D, API 608, ASME B16.34, and other international standards. Every valve undergoes hydrostatic shell testing, seat leakage testing, dimensional inspection, and operational verification before dispatch. Material Test Certificates (MTC), inspection reports, and supporting quality documentation are available to assist engineering evaluation, procurement, and project compliance.

Supply Across Africa

African Valve supplies Forged Trunnion Ball Valves to oil & gas, petrochemical, mining, power generation, LNG, water infrastructure, and industrial processing projects throughout Nigeria, Egypt, South Africa, Kenya, Ghana, and other African countries, along with international export markets. Valves are available in multiple forged material grades, pressure classes, end connections, and operating configurations to meet project-specific operating requirements.