How to calculate thickness of the segmental ring?

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SUMMARY

The discussion focuses on calculating the thickness of a segmental ring used in pressure seal bonnet valve design. The segmental ring is crucial for withstanding the forces exerted on the bonnet due to working pressure. Participants emphasize the need for additional details such as the type of shaft (reciprocating or rotating), the fluid involved (air, steam, etc.), and the maximum operating pressure and temperature to provide accurate guidance. Resources like the "Mechanical Packing Design and Theory of Operation" are recommended for further understanding.

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  • Understanding of pressure seal bonnet valve design
  • Knowledge of mechanical packing and sealing theory
  • Familiarity with fluid dynamics and pressure calculations
  • Experience with material properties and stress analysis
NEXT STEPS
  • Research "Mechanical Packing Design and Theory of Operation" for insights on segmental ring seals
  • Study the impact of operating pressure and temperature on seal performance
  • Learn about stress analysis techniques for static and dynamic seals
  • Investigate design considerations for reciprocating vs. rotating shafts in valve applications
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Design engineers, mechanical engineers, and professionals involved in valve design and sealing solutions will benefit from this discussion.

saran
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Hi,
I am working as a design engineer. I am new to pressure seal bonnet Valve design. In that valve concept we are using a ring called as Segmental ring. The purpose of this ring is to withstand the entire force acting on the bonnet due to is working pressure. Now i want to know how to calculate the thickness of that ring. Here i am attaching the Picture for your ref. Thanks in advance.
 

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Hi saran

As per the first thread in this section of PhysicsForums (PF), this is for introductions only (https://www.physicsforums.com/threads/please-read-no-questions-in-new-member-introductions.776481/). Please post your questions in the other areas of PF.

And also, welcome to PF!

Stevie
 
Baluncore said:
Here is a link to; Mechanical packing design and theory of operation. It includes segmental ring seals.
http://www.c-p-i.com/media/cms_page_media/11/cpi mech pck bklt US-updte6 11-.pdf
We need more information before we can give a better response.

Baluncore said:
Here is a link to; Mechanical packing design and theory of operation. It includes segmental ring seals.
http://www.c-p-i.com/media/cms_page_media/11/cpi mech pck bklt US-updte6 11-.pdf
We need more information before we can give a better response.

Hi Baluncore thanks for your reply. What kind of details you want for this?
 
Is this for a reciprocating or a rotating shaft?
Is it for air, steam or some other fluid?
What is the maximum operating pressure and temperature?

In your section diagram 10e.jpg I see no contact between a moving shaft and a seal that will wear. It appears to only involve a static packing. So where is your segmental seal going to be placed?
 

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