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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Context:: Shell MESC Understand that 77/312 is no longer valid and 77/300 is taken over 77/312.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
Double-Block Valves and Double Block and Bleed Valve 2010-10-21
Does anyone know the application of double block and bleed valve, i understand this valve consists of double seats with a body bleed, is it correct? Aslo, i heard that in case the pressure rating 900
Resilient or metal seated gate valves 2010-10-21
Is there reason to spec one over the other instead of just life span? The city I am doing work for specs only brass metal seated, but the contractor says that he has never used anything but resilient
