What is a Trunnion Mounted Ball Valve?
A trunnion mounted ball valve adopts an upper and lower support bearing design, which keeps the ball stable in high-pressure environments and prevents displacement caused by medium pressure. Its core advantages include:
Low operating torque
Reliable high-pressure sealing performance
Suitability for large calibers (1/2"–56") and high pressure ratings (150LB–2500LB / PN20–PN420)
Long service life and convenient maintenance
This structure ensures that the valve remains smooth and stable even under frequent operation and harsh working conditions.
1. Bidirectional Sealing
The valve achieves reliable bidirectional sealing regardless of changes in medium flow direction, ensuring system safety.
2. Fire Safe Design
It meets international fire safety certification standards and can maintain sealing performance even under extreme temperature conditions.
3. Double Bleed & Block Sealing Structure
The DIB-1 and DIB-2 configurations provide enhanced isolation, effectively avoiding:
Medium cross-contamination in pipelines
Internal leakage risks
Maintenance complexity
It is highly suitable for working conditions such as liquefied natural gas (LNG) systems, oil and gas transmission pipelines, and storage tank systems.
4. Multiple Material Options for Diverse Working Conditions
It supports manufacturing with a variety of materials:
Carbon Steel
Stainless Steel
Duplex Steel
Ni-Al Bronze
Monel
Hastelloy
These materials are suitable for complex medium environments involving corrosion, high pressure, and high temperature.
Application Fields: Covering Core Scenarios Across Multiple Industries
Trunnion mounted ball valves are core equipment in many critical industries, including but not limited to:
Oil and gas exploration and transmission pipelines
Oil refining and petrochemical plants
Process control in chemical factories
Natural gas treatment, storage and transportation systems
Offshore platforms and seawater treatment
Power plant steam systems and high-pressure pipe networks
Their reliability and safety make them important safety nodes in high-risk and high-value systems.
