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Thank you guys. I do think its not enough. Also for the strainer to work efficiently it does require 200kpa minimum, but my pressure decreses overtime as the settler tank gets lower. So a booster pump will be required. And Ofcourse the underlying issue as to why the settler is not capturing the...

Hi @littleinch these dewatering underground assets are almost 40 years old and the settlers not as effective as it used to be. The settler gets its feed from few other sumps around that ore body specially during wet season.

Hi @littleinch that is true, but thr main pump i am trying to protect is almost half a million, so a small priming pump would be a good trade off?

Hi @littleinch, the only reason for the backwash filter is for the Amount of solids getting lodged in the pump and having to rebuild the pump every year. A booster pump before the filter would solve the issue I think?

Hi @desertfox, Apologies for confusion, i am concerned if i will have enough NPSHr after i install the backwash filter before the pump inlet. The pump requires 5.5m head for reqired flowrate.

My Npshr is 5.5m for my reqired flow rate and the pump performance is around 244m at 90l/s. Issue is i want to install an automatic backwash strainer in the pump suction line as we often find shotcrete fibers/small rocks getting lodged into the impeller. But i am not too confident if having a...

Hi, I have an underground arrangement of 3 setteler tanks and i want to determine NPSHA as the pump is cavitating fast. What would be the best way to determine the head from the 3 tanks?

Hi @robyengit, I was thinking of welding a few plates like this and bolting it to wall as your picture. Instead of making whole column like a box, putting 5 plates welded both sides and stiffening to wall might be more economical. What do u think?

@robyengit thanks mate.

Hi @robyengIT thanks mate. So possible plates on both side of the column for the whole length (or Atleast till the platform) and stiffened from the plates to wall bolted? You reckon further stiffening/ modification in the ground too?

@robyengIt i have attached the design i have selected to go with for my underbraced jib. Current results by the manufacturer indicate that allowable deflection is exceeded in both the perpendicular and slewed direction, and so the existing column is not suitable for the i installation. The...

Hi robyeng, if you look at this attached picture, the colum is bolted to the wall behind. Do you reckon the colum would require additional support? The jib is to just lift the pump actuator and do maintenance and worse case drop it to ground for...

More images. The column runs through the platform to the groundhttps://files.engineering.com/getfile.aspx?folder=9c320745-61bd-4e00-ada4-30757e02980e&file=9CF2F931-9462-403A-91A3-DE2D837308FF.jpeg

Hi, I am trying to change an existing overbraced jib crane to a new underbraced jib to gain more head room. The manufacturer has chosen 2ton, 2.5m 180 degrees swing manual hoist jib as we required. However their basic engineering checks has determined the support column which runs from bottom...