Local Storage seems to be disabled in your browser.
For the best experience on our site, be sure to turn on Local Storage in your browser.
![Trunnion ball valves Trunnion ball valves](https://www.syveco.com/media/catalog/category/6015AICG-vanne-sphere-acier-JC-arbre-class150-graphite-ok.jpg)
Trunnion ball valves
The trunnion valve is designed with a ball held by the stem at the top and by a shaft called a trunnion at the bottom. This design has advantages for both low and high pressure applications: better sealing and reduced torque.