Double Seat Seals

[kamarulridzuan]

I have API 6D ball valves that which is note that valve is "Double Seat Seals".

Did someone knows about that terms?" Double seat Seals"

 

[micalbrch]

That's what I found:

http://www.eprvalve.com/en/Products/FORGED FLOATING BALL VALVE/detail.asp

Looks interesting but I'm not sure if it answers your question.