Hi Ivarfar,
As you know there were a few manufacturers of the rising stem ball valve:
The Orbit, the Dresser Omega and Control Seal from The Netherlands, all these true rising stem ball valve manufacturers are now part of Cooper Cameron.
As a spin off from this merger a new Dutch manufacturer...
Neil,
Can you tell us a bit more on pressure and temperature?
If your seats are not damaged I do not believe a non slam check valve will solve your issue (also they will cost your customer a fortune), I am thinking more in lines of a rubber lined back flow preventor.
Regards, Marcel
Hi people,
May I take the opportunity to point out that these test gags should be REMOVED and safely stored during normal operation????
I consider test gags as very dangerous, they should be red labelled and checked upon during start up procedure.
Be aware I have seen them mounted in a full...
One thing is for sure, the 77/312 is mandatory for all Shell projects due to fact that Shell promotes sustainable growth.
It is true that the text of the 312 is under development as is the Law of Europe.
Not a lot of vendors have been approved and indeed Shell Global Solutions International...