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  1. acewolf187

    High pressure pump recommendation for hot water

    Thanks for the suggestion georgeverghese.
  2. acewolf187

    High pressure pump recommendation for hot water

    Thanks Goutam_freelance.
  3. acewolf187

    High pressure pump recommendation for hot water

    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.
  4. acewolf187

    High pressure pump recommendation for hot water

    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...
  5. acewolf187

    High pressure pump recommendation for hot water

    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...
  6. acewolf187

    Effect of superimposed backpressure on PSV reseat pressure

    Thanks very much for the advice don1980 and avalveman. Best Regards, Acewolf
  7. acewolf187

    Effect of superimposed backpressure on PSV reseat pressure

    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...
  8. acewolf187

    Effect of superimposed backpressure on PSV reseat pressure

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

    Effect of superimposed backpressure on PSV reseat pressure

    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...
  10. acewolf187

    Lifespan of vent filters

    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...
  11. acewolf187

    Tube rupture causing incompatible materials mixing

    I agree, the pin-hole leak is a far more credible scenario. Thanks Met11.
  12. acewolf187

    Tube rupture causing incompatible materials mixing

    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...
  13. acewolf187

    Clogging of Relief Valve Inlet Spool

    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...
  14. acewolf187

    Clogging of Relief Valve Inlet Spool

    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...
  15. acewolf187

    Clogging of Relief Valve Inlet Spool

    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...
  16. acewolf187

    Minimise product loss in filtration

    Ethylene dichloride. Plate and frame filter press.
  17. acewolf187

    Minimise product loss in filtration

    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...

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