For maximum allowable shear torque calculation, I used maximum allowable shear stress, which equals shear factor(I pick 0.667, different factors from different strength criteria) times shear Limit(from ASTM standard). In reality, your material shall meet/exceeds the shear limit to qualify the...
Dear all good morning,
I am interested in the history how ball valve developed, what is the initial design pattern looks like and how and why it gradually become today's design. Anyone can enlight me? It might involve different design, material selection, seal and seat innovation etc..
Best...
The valve is NPS 16, class 600, gear operated. Nylon/HNBR seat/seal, change to PEEK seat, inconel x750 spring.
gerhardl,
Your information is supportive and helpful. Thanks a lot.
David,
You answer is what I want exactly, but could you illustrate why floaters does not change, what I think is...
Good morning dear all,
I am new to valve industry, our sales threw a question to me regarding if they are changing seat material from, how much torque will added to actuate the valve.
1.) NPS 16, class 600, Trunnion ball valve, seat material changing from Nylon to Peek, what might be the...
