News
News
Collar ring in a Exteneded Bonnet valve 2010-11-10
For Cryogenic valves clinet has a requirement for the "Collar rings" at the extended bonnets.
Needle Valve Inquiry 2010-11-10
I inquire needle valve manufacturers for Class 4500 pressure ratings.(For example Fujikin needle valve)Please verify that you require needle valves rated 4500 psig or other such rating as well as the
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.
