<Hey Webmasters! Get a free website with holiday themes - Get it NOW! 
|
pipingdesigners.com forum
Please use the new forum. THIS IS FOR REFERENCE ONLY. NEW FORUM NEW FORUM NEW FORUM NEW FORUM NEW FORUM NEW FORUM NEW FORUM NEW FORUM NEW FORUM NEW FORUM NEW FORUM NEW FORUM NEW FORUM
|
|
| Search For Similar Forums · Return to Website | ||
 First |
 Prev |
 Reply |
 Forum |
Next  |
Last  |
| Viewing Page 1 of 1 (Total Posts: 8) |
| Author | Comment |
tarictic
 Apr 20, 06 - 10:13 AM |
Reducer
does anyone knows why we really install reducer to pump nozzle? JOP-any thoughts |
|
thehat
Apr 20th, 2006 - 11:09 AM |
Re: Reducer
Is this a trick question?? 
|
|
Jop
Apr 20th, 2006 - 1:24 PM |
Re: Reducer
Yes, 99 times out of 100 times, the suction line size is one (or more) size (s) larger than the pump suction nozzle size. Therefore the reducer. Simple. Your next question is going to be "Why is the line size larger than the pump nozzle? That is a question you must ask the process engineer and the pump engineer. Maybe its because they never talk to each other. |
|
backsicker
Apr 21st, 2006 - 10:31 AM |
Re: Reducer
Because Out of pump the water must be closely pressed. if you dont use reducer the water must not be closely pressed and then there can be a kavitation. |
|
e-train
Apr 21st, 2006 - 1:32 PM |
Re: Reducer
I think Jop has got the correct answer. Although cavitation in a pump occurs when there is insufficient NPSH available I do not believe this is overcome by a reducer. |
|
Tarictic
Apr 22nd, 2006 - 5:27 AM |
Re: Reducer
JOP-I'm impressed.... I hope this simple question adds some ideas to other piping designers and not just looking on a P&ID when doing designs. cheers!!!! |
|
Pattnaik
Apr 22nd, 2006 - 12:53 PM |
Re: Reducer
Yes Boss If in pump suction side not providing reducer , at any time It may cause caviation. Nothing to disturb out the process generally in Industries they use Eccentric,Flat side up reducers. |
|
Tarictic
Apr 22nd, 2006 - 2:25 PM |
Re: Reducer
Guys, With or without a reducer, there is a possibility of building up cavitations on pump suction. Why? whenever the liquid pressure drops below the vapor pressure, liquid boiling occurs, and the final effect will be cavitation. Why one size lower? reducing the size pump is less cost that adding a reducer. Another thing is that a pipe one size a larger to a pump nozzle, this means that the line is always flooded or full going into the pump avoiding less pressure. Next question is, why conc. red. top flat? When ever bubbling occurs, bubbles stays at the bottom of the reducer not affecting the flow or allows the continous flow of the liquid. Cheers!!!!! |
| First |
Prev |
Reply |
Forum |
Next |
Last |
bravenet.com