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  1. DiamondDave

    General pumping questions

    Thats actually my thoughts, i think its a sping loaded needle valve weighed down will a ball cock that should float once primed and close the pipework to stop water getting drawn in and thus giving the signal to start the pumps. I suspect either the valve is seized or the chain holding the ball...
  2. DiamondDave

    General pumping questions

    Thank you again guys. I was getting 25inHG on the vacuum tank gauge but the pumo casing was empty, it didnt even look as if tried to pump. I had also throttled the valve so to try and prevent it discharging everything too quickly. I am convinced there is a blockage in the priming system as it...
  3. DiamondDave

    General pumping questions

    Hi littleinch,thanks for an informative post. Ive taken some more measurements. Id say the centre of the pumps are approximately 13 feet from the dock floor which is 0 on the draftboard but we have a dock sump where the pumps draw from which was full and is probably another 10 feet deeper than...
  4. DiamondDave

    General pumping questions

    Thank you very much for responding guys. I am going to try and get a manual tomorrow, ill also confirm pipe diameters and get what informatjon I can from the pump tally plates. Off the top of my head they are gorman rupp super t-series 10" ive actually just found their website and they have...
  5. DiamondDave

    General pumping questions

    Thanks. I was away from site when all this was installed but I am supposed to operate and maintain it but I havent seen a manual for any of it. Im also conscious that we have never been trained on understanding gauages and what head means etc or how to calculate pressure differentials and...
  6. DiamondDave

    General pumping questions

    Rputvin Thanks id say that looks correct
  7. DiamondDave

    General pumping questions

    1503-44, thanks for replying So the discharge valves should be open when the dock is being discharged "pumped out" and the charge valves should be open if the dock is being charged (wanted pumped in) the cross fitting after discharge valve 1 is connected to all those pipes as is the cross...
  8. DiamondDave

    General pumping questions

    MedicineEng Thanks for responding. It actually looks like they discharge into a t-piece, 9ne from bottom one from the side to the discharge. Coupd you explain to me how pressure works in a pump? Does it g up or down with flow rate? There is also a lot of vibration within th3 pumps and...
  9. DiamondDave

    General pumping questions

    Hi guys, I work at a dry dock facility and its bothering me that I dont know as much about our pumps as id like and I also have questions about our set up. Should all pumps have a gauge on suction and discharge side and if so how do I read the information on them? What can it tell me? Is...
  10. DiamondDave

    Are clearly marked stop buttons required

    Thanks IRStuff. I guess it must be somehow alright to have this as this Is how they are made but it really just is so surprising to me that there isnt an off aside from the main isolater. I just keep getting a feeling its one of those things where something will happen and the lack of a clear...
  11. DiamondDave

    Are clearly marked stop buttons required

    Thank you Che, i do understand your point and I agree with the principle of what you are saying. I thinm it just feels totally alien that it isnt clear that this does stop the main fan.
  12. DiamondDave

    Are clearly marked stop buttons required

    Thanks for that, I havent seen a manual for them before. It does look like they come in from new like this. It just strikes me as odd that it doesnt say stop anywhere on it. Even stop/clean or something.
  13. DiamondDave

    Are clearly marked stop buttons required

    Thanks for the reply guys. Che-regarding point 2. The blue buttons stops the main motor for the fan and it coasts down to a stop. There is then a 2 minute delay and a separate shaker motor then shakes the filter bags. The blue button is used to stop the machine. There are also no emergency...
  14. DiamondDave

    Are clearly marked stop buttons required

    Hi Folks, There are some machines in an area that I routinely perform maintenance on. They are extraction machines for a saw mill/woodshop. The machine starter boxes have 2 buttons a green one marked start and a blue one marked clean. The blue one is also the button that stops the machine it...
  15. DiamondDave

    Overhead Crane wheel standards/allowances

    Honestly I think there are lots of problems i dont know where to begin with our cranes. On this particular crane a drive wheel outer flange recently collapsed after what looks like excessive wearing and allowed the wheel to roll over the rail onto the opposite side. I have just been up and...
  16. DiamondDave

    Overhead Crane wheel standards/allowances

    Oh I actually already had that ISO document saved as I managed to get it through university. Helpful but it doesnt seem to have anything relating to flange wear. Cheers guys
  17. DiamondDave

    Overhead Crane wheel standards/allowances

    Thank you. Its juat i dont think I should be paying for it when it should pwrhaps be known for my company.
  18. DiamondDave

    Overhead Crane wheel standards/allowances

    Thank you. I dont suppose you know where i could get a free copy? 😉
  19. DiamondDave

    Angular displacement backlash

    Be lucky to find a book for this crane.... The metric bolts were m6 the imperial ones were 1/4 whitworth. So to be honest the m6s shouldn't even have fitted. The top cover bolts were 5/8 whitworth and these had some stretching just before they mated with the bottom cover threads. In this...
  20. DiamondDave

    Angular displacement backlash

    The holding down bolts for the block top covers were imperial although they were actually set screws not bolts so I am wondering if that would have allowed some play. Metric bolts were fitted on metal covers which the shaft runs through and attach to either side of the plummer blocks. No idea...

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