metal to metal
metal to metal
(OP)
Hello,
I want to know please if the metal to metal seat / ball ( ball valve) is suitable for gas service.
thanks
I want to know please if the metal to metal seat / ball ( ball valve) is suitable for gas service.
thanks





RE: metal to metal
Depends on requirement for thightness (allowable leakage, and required tests for this leakage), if if the ball valve is of a construction and the application of such type that this requirement can be expected for the duration of the expected or required lifetime for the application.
A combination or laminated seat might be more what you are looking for. Firesfae certification?
RE: metal to metal
Also I want to know please if the sealant injetion will be dangerouse one we have metal to metal valve.
Thanks
RE: metal to metal
Heather's focus: Alloy Valves Duplex Valves Super Duplex Valves Monel Valves Inconel Valves Titanium Valves & 6 Moly Valves
RE: metal to metal
There would be two reasons to go to metal seats on this application:
1). It is very abrasive (although there are some instances where you could use a "soft" abrasion resistant seat.
2). The temperature is above about 500F.
What is the gas? What is the pressure? What is the temperature?
RE: metal to metal
the gas is natural gas.
operating temp is 62 C.
Operating pressure 101 barg.
Thank you in advance
RE: metal to metal
RE: metal to metal
is the valve type (i.e. ball) a mandatory requirement?
If not, maybe you can switch to a "lighter" design (e.g. triple-offset butterfly) keeping the metal seating with the relevant abrasion resistance, while saving total metal weight in the meantime...(?)
Hope this helps, 'NGL