Search results for query: *

Thanks MortenA and PeterIGG for your kind answers. I wonder what a recommended value for over design might be advisable for valve selection to avoid such problem as chattering. Anyone knowing if calibrating over designed PSVs might be an issue? Thanks!

After calculating required capacity for a safety valve service, the final selection for the rated capacity and/or selected orifice area is normally X times the required capacity or required orifice area. What are recommended values for this "X" value? What might be the impact of selecting a...

Dear colleagues, Does anyone know of a written document / specification /reference for avoiding cooling water outlet from shell and tube exchangers above 120 F? Scale formation at this temperature occurs, but it is not easy to find a reference document / specs supporting this fact. Thanks

Does anyone know about a formal/official specification/engineering standard documenting or providing guidelines for selecting an specific pump recycle system? Meaning when to select: Continuous recycle (Use of ROs), Control Loop (Use of Control Valve). API 610 does not address this issue, as...

Here is the sketch...http://files.engineering.com/getfile.aspx?folder=5e5593aa-42b1-423a-b4be-672c24ae4f5e&file=CHD_pumps_spillback.pdf

Greetings to all! I attach one sketch to explain better the case. Hope it helps. Regards!

LittleInch, the line to offsite is connected to other delivering systems, so there is a potential for some back pressure to be exerted on the line coming from the concerned pumps when they get started by the level function in the drum. I suppose that’s the reason for the recirculation flow back...

Thanks LittleInch. My pumps run on intermittent service. They run whenever the material level hits a set value, so I guess an RO has been well specified. My question now remains as per the convenience of installing a globe valve on these spill backs. Thanks.

Thanks for your feedback, don1980 / georgeverghese. My case is a system already built but not commissioned yet, to be used for pumping waste HC and oily water (2 independent pumps) from a closed drain system drum to offsite (submergible pumps), using a continuous recirculation spill back on...

What would be the criteria to select the use of an automatic flow control valve vs. an restriction orifice installed on the spill-back line?