flushing ring gasket

[arnie77]

hello, can anyone explain what is the torque value to use if i have two type of gasket one on each side of a flushing ring. one gasket is spiral wound and the other is graphoil as default gasket provided by rosemount level transmitter diaphram seal. Is this a common practice to have one type of gasket on each side of a flushing ring.

thanks,

 

[qdzung]

two sides of flush ring shall have the same rating and may be the gasket on instrument side has chosen with higher rating.In this case you should followed torque from the instrument manual(rosemount).