In a trunnion mounted ball valve the ball is anchored on top and bottom bearings rather than floating, so the seats are loaded by line pressure and the operating torque stays low even at large sizes. That is why the design dominates large-diameter gas and pipeline isolation.
Pipelines, compressor stations, terminals, LNG and large gas gathering systems use trunnion ball valves. They are specified to API 6D, bought with actuators and documentation, and replaced rarely, which makes any surplus a significant item.
We buy trunnion ball valves in any quantity — single items, mixed pallets or whole cribs, including valves that need repair and assemblies that are missing parts. We do not require a clean inventory before reviewing a list.
| Common patterns | Two-piece and three-piece body, Full port, piggable and reduced port, Double block and bleed, API 6D and API 6A patterns |
|---|---|
| Typical service | Gas transmission, Pipeline stations, Terminals and storage |
| What we look at | Size, class, body and trim material, port type, operator and certification. For pipeline valves we also ask about the end connections and whether the valve is piggable. |
| What to keep | Keep the valve closed, keep the actuator and the gearbox, and keep every document: material certificates, pressure test records and API monogram paperwork. Documentation is a large part of the value. |
Patterns and variants
What turns up most often
Variants matter because they change the buyer pool. A standard pattern sells to a rebuilder or a plant with the same service; a specialised trim sells to a much smaller group but often at a higher price. If you are unsure which variant you have, the nameplate or the trim marking will usually say.
Before it leaves site
How to protect the value
Keep the valve closed, keep the actuator and the gearbox, and keep every document: material certificates, pressure test records and API monogram paperwork. Documentation is a large part of the value.
Where they come from
Industries and services
- Gas transmission
- Pipeline stations
- Terminals and storage
Most of the surplus we see comes from plants that have replaced equipment for a reason that has nothing to do with the valve: a unit was re-rated, a line was re-piped, a control loop was upgraded or a project was re-scoped. The valve is simply the part that has to move.
Related patterns
Other valve types
Built to be serviced in place. Top entry ball valves are expensive, repairable, and a strong sur…
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Read → Valve type Four Way ValvesFour ports, one body, and a very specific purpose. Rare in resale, and valuable to the right buy…
Read →Questions sellers ask
Do you buy API 6D valves without paperwork?
Yes, but the price reflects it. Pipeline buyers expect test and material records.
Can you handle very large valves?
Yes. We regularly work with valves above twenty inch, and we arrange the lifting and transport.
What about gas over oil actuators?
Complete actuator packages are of interest. Photograph the actuator tag and the control panel.