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  1. 791018

    Beaver 1600 CSD Electronic Devices

    hello frenz i've traced the some failure on other parts, i still wait for a drawing from the manufacturer's due to lost of original drawing. However, i tried to trace by following the direction of the circuit, from main hydraulics relay to cutter speed relay, PCB Diode, Junction Box Panel and...
  2. 791018

    Cavitation, Why?

    i not yet post a pictures of my impeller which had a pitted on it. I'll try to post it ASAP.
  3. 791018

    Cavitation, Why?

    maxidur is the model of the pump. actually the material used is a chromium carbide cast iron. see thread330-144660 for details. I agree with you, the suction pressure cannot be minus. Just because there is two gauge to display suction pressure and discharge pressure, suction gauge must be noted...
  4. 791018

    Cavitation, Why?

    bulkhandling the pump is used at a cutter suction dredger where the suction head is varies due to elevated suction. thats why the pressure assumed to be negative (so my pessure is about -6 to -7 bar). I'll try do do the NPSHa calc and i'll comeback with the data.
  5. 791018

    Beaver 1600 CSD Electronic Devices

    no specified part no found just the manufacturer code number 28340235 (IHC Holland) refer to the drawing, just a simple connection from PCB to Solenoid in series, and the solenoid wasput 20m away from the diode.
  6. 791018

    cracked pump-hardfacing effects?

    Dear all Below are list of the links to image taken for failed pumps for you to get the clear pictures for comments 1. http://tinypic.com/kf31ch.jpg - Failures on wearing plate 2. http://tinypic.com/kf32th.jpg - Location of the fails 3. http://tinypic.com/kf32x5.jpg - Cracked casing 4...
  7. 791018

    cracked pump-hardfacing effects?

    dear arunmrao and metengr, thanks for your recommendation. in order to get the best performance, many consideration has to be made. either using 15Cr-3Mo or Nihard, both have thier own advantage and disadvantage. However, i need to consider the market price and availability for all materials...
  8. 791018

    Beaver 1600 CSD Electronic Devices

    sleeping time aaaa... k... i'll try my best TQ
  9. 791018

    Cavitation, Why?

    i'll try to post an image. However, let me firts monitor the improvements of new installed pump casing and suction/discharge pipe. TQ
  10. 791018

    cracked pump-hardfacing effects?

    the casing that i'll weld is completely removed from the system. so, it'll be part of my analysis. just need some exercise to do the precaution to weld the things.
  11. 791018

    Beaver 1600 CSD Electronic Devices

    1. see diode no 3 and 4 2. burned plates 3. nonworkins solenoid which not received a signal 4. 5. Port Side console for electronic device
  12. 791018

    Beaver 1600 CSD Electronic Devices

    image was uploaded at links below: 1. http://tinypic.com/kez38z.jpg 2. http://tinypic.com/keznyg.jpg 3. http://tinypic.com/kezo0i.jpg 4. http://tinypic.com/kezo1x.jpg 5. http://tinypic.com/kezo6d.jpg i'm waiting for ur reply
  13. 791018

    Beaver 1600 CSD Electronic Devices

    itsmoked cutter suction dredger is the most popular machine to do a dredging work for reclaimation and canalling. its a vessel!! u can see many derdgers and system at www.ihcholland.com or other dredging company (baskulis, van oord etc.) ok i'll upload the image for you soonest possible TQ
  14. 791018

    Cavitation, Why?

    hello frenzz after got some hint from u guys, we upgrading our pump and piping system. i'm now in process to monitor the improvement. before this, our pump running at 1550rpm and it create a suction pressure at 6 - 7 bar at 6 bar discharge pressure. the minimum flow rate we got is about 0.8...
  15. 791018

    cracked pump-hardfacing effects?

    dear metengr i can weld the casing but, as you said, now its time to look for replacements. gieter proposed to used Nihard grade 4. How 'bout you? any suggestion to improved my pump rather than max 5 or nihard?
  16. 791018

    Cavitation, Why?

    hello frenzz after got some hint from u guys, we upgrading our pump and piping system. i'm now in process to monitor the improvement. before this, our pump running at 1550rpm and it create a suction pressure at 6 - 7 bar at 6 bar discharge pressure. the minimum flow rate we got is about 0.8...
  17. 791018

    Beaver 1600 CSD Electronic Devices

    Yes we are running a 24 V D.C. supply the diode is built in on the PC Board as a 'distributor' from electrical source to our solenoid in hydraulics system.
  18. 791018

    JH 8.8

    could anyone advise me about advantage of using JH8.8 bolts rather than high tensile galvanized bolts? we are using it for our floating pipelines in fresh water.
  19. 791018

    Beaver 1600 CSD Electronic Devices

    Hi Could anyone advise me in this problems in Cutter Suction Dredger type Beaver 1600 electronics devices we faced a problems in our electronic signals from the PCB to a solenoid for hydraulics system. our cutter speed 3 is not functioning, ive done all things in hydraulics parts and all the...
  20. 791018

    SS to CS, type of electrode ???

    try kobelco 5018 or ferrocraft 7018

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