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Hi All, I would appreciate if anyone can advise here the acceptable set pressure tolerance and the standard used for testing PVRVs. I have done numerous research and all that I came across mentioned that allowable is +/- 10% for pressure/vacuum setting, however there is no document/standard to...

Hi All, In the absence of a test bench and limitations for use of a test flange, I would appreciate if anyone can share a design/photo of an attachment that can be bolted on 24" or similar size Butterfly Valve for performing seat leakage and hydrotesting without touching the wafer in the fully...

All, Thanks for the feedback.

JAlton, Based on your experience with reference to consolidated PT for air, gas and steam service valves, set pressure must be at a slow and uniform rate(starting from 90% of the anticipated set pressure, not to exceed 2 PSI per second)but rapid enough to cause the valve to open. Does this...

JAlton and bevjones2009 thanks for the support thus far on this post. Prior to performing the additional tests that you've recommended above,I've attached a picture of my test bench being used to test the PRV.Can you identify if the setup is suitable for testing water PRVs in comparison to...

Hi All, With reference to ANSI/FCI 70-2-1991 standard for control valves(unbalanced type), can I perform a seat test(50 PSI) in the direction of flow through the valve or do I need to always test where the flow goes from the top of the valve plug and out as shown in the attached? Would it make...

Hi Good Day, I have a 535H pressure regulator with a bench range setting from 2-10 PSI.Can I be able to set at the regulator at the low end 2PSI setting OR would its repeatability be affected? Appreciate your feedback.

Hi All, For a 15,000 PSI Chart recorder, at what percentage of the chart should be the safe test pressure prior to getting a recorder with a higher range. For example, I want to test an item at 13000 PSI,can I use the 15000 PSI recorder or will I need to get one with a higher static range...

LittleInch Please find attached sketch releated to previous posting.http://files.engineering.com/getfile.aspx?folder=f369565d-f19f-4182-b5e6-37d72fa9a47d&file=Pressure_Reducing_Regulator_Setup.jpg

Thanks EmmanuelTop. LittleInch Sorry If I had you confused. My understanding of the 525 regulator is that it controls downstream pressure,so when there is an increase in demand the regulator adjusts itself and opens up to allow more flowrate downstream whereas when there is a decrease in...

Hi All, Can someone explain how a 525 masoneilan pressure regulator double seated plug operates within the process? Appreciate your feedback. Thanks

Appreciate your feedback EmmanuelTop.

Hi Good Day All, I appreciate if someone can explain what is meant by a CV ratio 50:1 on masoneilan control valve 10,000 series double seated. Thanks Naresh