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Butterfly type control valve wrongly inserted 2010-10-25
A large butterfly type control valve in a fuel-gas line has been installed in the wrong flow direction. Now, it will be difficult to extract the valve from the pipeline and turn it around because stru
What is the diffeence between 77/300 and 77/312 2010-10-22
Context:: Shell MESC Understand that 77/312 is no longer valid and 77/300 is taken over 77/312.
Valve stem rating 2010-10-22
We have a butterfly valve with 6" 2500# Flanges. A working pressure of 3080 psig, a differential pres of 700 psi. Materials are 316SS.
Cone/Ball Valve 2010-10-22
I have concern regarding how to control/set the emergency closing speed (seconds) and if it is really necessary, because I have others peers that said it is not necessary.
Non operable valves oin Shell Mesc 2010-10-22
Dear all,In certain Low temperature and cryogenic applications ,shell specifies valve bonnet to be non extended..
Does anybody know what ZCMS 66 is? 2010-10-22
In a valve data sheet I found ZCMS 66 specified as seat and spring material.
diffrence between ball valve and butterfly valve 2010-10-21
Ball valves and butterfly valves are both quarter-turn (90-degree turn from fully opened to fully closed) rotary valves. The family of rotary valves also includes cone and plug valves. They are used
