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Thanks for the suggestion georgeverghese.

Thanks Goutam_freelance.

Thanks Little Inch and EdStainless, those are very good options. What are your thoughts on piston vs plunger pumps. I was tending towards piston pumps but a little research suggests the seals on plunger pumps last longer due to being stationary.

Thanks for your responses. Reliability is an issue for this duty and I am determined to choose an excellent replacement pump, hence me seeking as much wisdom and experience as I can get. @LittleInch, you're quite right, "high" is indeed a relative term. My shortlist consisted of piston, screw...

Hi all, Does anyone have some experience with a reliable pump type (and possibly reputable manufacturers) for high pressure/relatively low flow applications. I require one to pump 2 m3/hr (9.2 US gpm) of 90°C (194°F) water and generate a head of 750 m (2460 ft) ~70 barg. It will run 24/7, be...

Thanks very much for the advice don1980 and avalveman. Best Regards, Acewolf

Thanks avalveman, I agree with all above. I however plan to use a conventional valve with a built-up backpressure of 21% but the overpressure at the valve inlet will be 26%, which the protected system can easily tolerate. I believe this is acceptable according to API520 but do you know any...

well explained, thanks don1980. Just as superimposed pressure affects the lifting pressure, the reseating pressure is also affected. Cheers, acewolf187

Hi all, If a conventional valve is set pressure of 10 barg and has a 10% blowdown, it operates with a superimposed backpressure of 0barg, it should reseat at 9barg. What if the exact same valve now has a superimposed backpressure of 0.5 barg, would it still reseat at 9barg or would it reseat...

Hi, Does anyone have a sterile vent filter on any of their vessels vents? How long do they last until they block-up and what are the inflows and outflows from the tank? I understand that there are more factors that will affect how quickly the filter would block but I just need a very rough...

I agree, the pin-hole leak is a far more credible scenario. Thanks Met11.

Hi all, I am considering a shell and tube heat exchanger with water in the tubes at 4 barg and hot oil in the shell at 1.5 barg. In case of tube rupture, I know water will flow from the tubes into the shell containing hot oil at around 250 degrees celsius. For pressure relief of the shell in...

pennpiper, Thanks for that. The vessel in question does not have the studding outlets but something I'll bear in mind in future. Snorgy, I consider re-seating as a valid problem so the valve needs to be inspected if it ever lifts. EmmanuelTop & Georgeverghese, The PSV is directly on a vertical...

Snorgy, Moving the PSV to the outlet would most likely result in the PSV being exposed to the lowest pressure in the vessel and might not protect the vessel if the filter plates are blocked. Moving the PSV to where perfomance isn't affected is one of the options I'm looking into though. mbt22...

Hello all, I have a pressure filter vessel with a PSV mounted on a 7" long spool from the vessel. As the vessel is a filter, solids-rich liquid (especially filter-aid) gets trapped in the spool and over time, the spool gets clogged with solids to the point that valve operation is compromised...

Ethylene dichloride. Plate and frame filter press.

Hi, Can anyone help me with this problem: Batch of liquid product in elevated tank needs to be filtered through plate and frame filter to barrels. Currently, gravity is used to drive the liquid through the filter but there's usually some left in the filter and pipework afterwards and I need to...