Seat calculations for floater ball valve
Seat calculations for floater ball valve
(OP)
Hello Everyone,
I am trying to develop a calc sheet for the Teflon seat used on a floater ball valve but i am not sure what type of calculation it would be? is it just stress calculations based on the applied forces? is it wear calculation. or to calculate the amount of deflection maybe?
I hope someone can shed some light on this. any insights will be greatly appreciated.
I am trying to develop a calc sheet for the Teflon seat used on a floater ball valve but i am not sure what type of calculation it would be? is it just stress calculations based on the applied forces? is it wear calculation. or to calculate the amount of deflection maybe?
I hope someone can shed some light on this. any insights will be greatly appreciated.





RE: Seat calculations for floater ball valve
i have seen some ball valve catalogs and they alway mention that they design them accordance to API6D and ANSI 16.34 ( mainly for flanges) .
regards
RE: Seat calculations for floater ball valve
RE: Seat calculations for floater ball valve
A (floating ball) valve will also have norms for exact described tests to verify that the construction and fabrication is OK. Examples are pressure tests, test for leakage, fire tests, SIL tests (verification of performance over time) etc.
One of the reasons is that all elements and details will vary and cannot be reasonably well described for exact technical calculation, but will have to be part of the overall general consideration of 'best practical solution'.
Teflon is a trade-name, not a material description, and will have different material properties, slightly varying from producer to producer and exact production recipe, mechanical form. metal backing and support etc. difficult to exactly normalize and standardize.
You will always come to an end point in standard description for a product where tests will have to be used to prove quality, in stead or on top of calculations.
Hope this will help you!
RE: Seat calculations for floater ball valve
RE: Seat calculations for floater ball valve
RE: Seat calculations for floater ball valve
On last post above:
In my opinion only if this is a part of a specific valve order. The manufacturer can then select to bid or not. There is a border between what is required by regulation and tests on one side, and fabrication secrets on the other side.
RE: Seat calculations for floater ball valve
RE: Seat calculations for floater ball valve
i just increased the height of the seat and increased the (pre-compression/squeeze/crush ) from .45 mm per seat to 1.45 mm
RE: Seat calculations for floater ball valve
Hello..!! May I know what's the Floating Ball Valve size, class, bore, 1p, 2p, 3p!??
RE: Seat calculations for floater ball valve
i have done the same on 8" #300 and 6" #300