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Hello All, API 6A covers face to face dimensions only up to 7-1/16 Ball valve size. Is there any other standard, I can refer to, for 2000 to 20000 PSI Ball valves? Appreciate your comments. Thanks

Does API 6D specify a test procedure for DPE seat Ball valves? How are DPE seats different from DIB seats? Appreciate your comments.

We are a ball valve supplier. We noticed that several of our ball valves that are over 2 years old have stem injectors rusted. They are made of A105 material with Zinc plating. Ball valve itself is made of A105, but there is no rust anywhere else. do you think specifying SS material for stem...

I referred to an old thread here on this subject. http://www.eng-tips.com/viewthread.cfm?qid=142842 I am still not clear on this. I read somewhere that RF smooth finish is perfectly flat and smooth and does not have any serrations. http://www.wermac.org/flanges/flanges_general_part6.html...

Hello valve gurus, Do you think Full opening check valves are supposed to be installed horizontally too? Clearance between body and disc is very small for these valves compared to regular swing check valve. Any little intolerance at the hinge pin joint will cause the disc to drop a little on...

Hi All, Our supplier just informed us, they are going to use solid ball for a 2" floater and a hollow ball for a 3" floater. will there be any difference in performance? what is the reason they use hollow balls in some cases and solid in some? Thanks in advance

How is this design different from regular wafer check and what are High performance Duo wafer check? Please help!

Hello guys, Can we use API 6D as a testing standard for this type of valve? What are the allowable leakage rates? Please give your kind comments.

Hi guys, I am looking for a standard, which specifies the valve body markings such as manufacturer logo, size, pressure, heat number etc. Is it an MSS standard? Since most of our valves are manufactured in china. It is a big challenge to us giving them instructions of our logo and marking...

Is there any specification or standard like B16.34 that mentions the need to machine(to make cast surface flat) the areas where the nuts rest on after they are tightened to the bolts. Please see attached. Thanks in Advance

We are a valve distribution company in Houston. We often get orders from customers which require the the valves to be fugitive emission test qualified. we are looking to get few of our valves FE prototype tested. I have contacted these companies, - United valve - Yarmouth Research and technology...