Sudha,
Motor RPM is 1750 and 50hp,
Old impeller size is 10.375 inches the new is 11 inches.
Yes, their is a flowmeter after the valve.
I reviewed the plan and found the problem, their is one more valve that is in close position. But another question arises the discharge pressure drops to 28 psi and the suction pressure is 13 psi, means the head the drops instead of increasing.
Regards,
Rommel
sudha kar <vsudhakar_mech@yahoo.co.in> wrote:
what is the motor RPM and motot KW
"Arturo Murillo ( T Visa CLN )" <amurillo@t-visa.com.mx> wrote: Rommel,
What the size of new impeller :
Do you have a flow meter after the valve?
Arturo Murillo
´Tuberías Visa de Culiacán.
Dear All,
I have commissioned a centrifugal pump months ago and here are the pump name plate 75ft TDH and 2000 gpm. The commissioning result are the following:
Suction pressure: 13 psi
Valve Shut Discharge pressure: 54 psi
Actual Impeller Diameter Base on submitted Pump Curve is: 10.2 inches
(base on the data gathered by valve shut delta pressure)
Final Discharge pressure: 39 psi @ 2000gpm or 60 ft TDH only (valve already adjusted to meet 2000 gpm requirement)
The problem is the pump did not meet its 75 ft. TDH, I contacted the supplier and opted to increase the impeller diameter.
Now when the new impeller was installed, I gathered the following:
Suction Pressure: 13 psi
Valve shut Discharge pressure: 56 psi
When we open the discharge valve the pressure is still the same (56 psi),
pressure gauge is calibrated and valve is functioning well. For me the
pressure should lower down to its operating limit prior to adjusting of
valve base on flow requirement. What seems to be the problem please
enlighten me. By the way the fluid is water.
Regards,
Rommel
Facilities Enginner
[Non-text portions of this message have been removed]
Yahoo! Groups Links
SPONSORED LINKS
Mechanical engineering Mechanical engineering jobs Cad drafter
Process piping Mechanical
YAHOO! GROUPS LINKS Visit your group "PipingDesign" on the web.
To unsubscribe from this group, send an email to: <a href="/group/PipingDesign/post?postID=eP9GD6E6hupelbnhp3LlmfgzFz0l-uipSgHS_cSFBvtnnxruxJSVqVd9NSlYCx44DV2sk4FYnam7IdOiJhMjRgDoHTGmF83-NSqiE0nMnw">PipingDesign-unsubscribe@yahoogroups.com</a>
Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
[Non-text portions of this message have been removed]
SPONSORED LINKS
Mechanical engineering Mechanical engineering jobs Cad drafter
Process piping Mechanical
YAHOO! GROUPS LINKS Visit your group "PipingDesign" on the web.
To unsubscribe from this group, send an email to: <a href="/group/PipingDesign/post?postID=eP9GD6E6hupelbnhp3LlmfgzFz0l-uipSgHS_cSFBvtnnxruxJSVqVd9NSlYCx44DV2sk4FYnam7IdOiJhMjRgDoHTGmF83-NSqiE0nMnw">PipingDesign-unsubscribe@yahoogroups.com</a>
Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
[Non-text portions of this message have been removed] Received on Sun May 21 20:41:00 2006
This archive was generated by hypermail 2.1.8 : Tue Mar 04 2008 - 11:40:47 EST