Groove dimension for Internal and External pressure (Vaccum)
Groove dimension for Internal and External pressure (Vaccum)
(OP)
Hello!
I'm constructing a pressure vessel which is intended to work with both- internal pressure (4 bara) and vacuum (~0,2 bara)- (not simultaneously of course).
The vessel have normal flange and cover (static- axial sealing).
When i look at the catalogs, manufacturers always separate internal and external pressure applications so i can not find any recommendations for groove dimension in this case.
I would appreciate the answer. Thanks in advance.
I'm constructing a pressure vessel which is intended to work with both- internal pressure (4 bara) and vacuum (~0,2 bara)- (not simultaneously of course).
The vessel have normal flange and cover (static- axial sealing).
When i look at the catalogs, manufacturers always separate internal and external pressure applications so i can not find any recommendations for groove dimension in this case.
I would appreciate the answer. Thanks in advance.





RE: Groove dimension for Internal and External pressure (Vaccum)
Are you using o-rings?
RE: Groove dimension for Internal and External pressure (Vaccum)
RE: Groove dimension for Internal and External pressure (Vaccum)
Did anyone had a similar problem?
RE: Groove dimension for Internal and External pressure (Vaccum)
RE: Groove dimension for Internal and External pressure (Vaccum)
That means that for example for O-ring ø188x4 (188- internal diameter) i need a groove ø196/ ø188? (with standard depth)
I am asking that because every O-ring manufacturer recommended that a groove should not be filled more than 85% or significant damage on O ring can occur.
RE: Groove dimension for Internal and External pressure (Vaccum)
If you have a copy of BS1806: 1962 this will give you the dimensions you need, alternatively I just found this online www.applerubber.com/src/pdf/seal-design-guide.pdf
If it was me I find 3.53 mm o-rings work well around the pressure you are talking about.
Also I generally have the ID machined slightly bigger than the ID of the O-ring, this stretches the oring a bit and just helps hold everything in place during assembly
RE: Groove dimension for Internal and External pressure (Vaccum)
https://www.parker.com/literature/ORD%205700%20Par...