News
News
What is a "Self Venting Plug"? 2010-11-10
A Custumer ask me a Self Venting Plug on a valve equipped with low emission packing.This Plug help to measure the lakage rate of the valve packing.
Control valve pressure drop - Best method 2010-11-10
I have heard of three alternate methods (vs the traditional one consisting of allowing 50 to 25% of the system frictional pressure drop excluding itself to the control valve) to determine the allowabl
ASME B16.10 2010-11-10
this is in reference with ASME - B 16.10 ... 2002Q1) in this std mating flanges are defined to be as per B 16.5 and B 16.47 series A... but wht bout flanged valves with series B?
Greasing of Packing 2010-11-10
Is it legal to grease packing before testing a valve? API 598 (section 4.4.1) infers that the packing should not be greased because it is a "sealing surface."
Control valve - CV at 100% open 2010-11-10
How can i obtain the the CV value of a control valve at 100% open, knowing the CV value at 80% open for example?
Control Valve Leakage Calculation 2010-11-09
I just read an article about control valve leakage calculation details below.Cv max = 182, Flow rate at 100% open = 50 MMScfd The valve is ANSI class IV specification.
Fire-safe test failure? 2010-11-09
I am having trouble with the fire test of big dimension floating ball valves. And I will appriciate your comments if you have an idea about the possible reasons.
Cryogenic ball valve seat material 2010-11-09
What seat material can be used for cryogenic ball valve in sour service? The temperature range is -198C-32C. Pressure ratings are 150#, 300# ,600# and 900# line.
