Re: [Man.Distr]Re: Northing

Sounds like a perfect question for Jacques.

<a href="http://groups.yahoo.com/group/centrifugal_pumps/">http://groups.yahoo.com/group/centrifugal_pumps/</a>

and

<a href="http://www.fluidedesign.com/q&a_pump_systems.htm">http://www.fluidedesign.com/q&a_pump_systems.htm</a> <-- (a "must see" page)

Paul

• Original Message ----- From: "Steve McKenzie"

> Am hotrodding an uphill water pipeline. 4km long, about 350m rise.
Consists
> of pond, main lift pumps (2 X 250kW), pipeline and did 70l/s. Four years
ago
> I pushed it to 80l/s by adding a 75kW suction booster between the pond and
> the main lift pumps. Now am going for 100l/s, above which I think it will
> blow to bits. To achieve the extra flow, I am adding a 300kW booster pump
> (already ordered) halfway up the hill. The pump is going up the hill in
> order to keep its inlet pressure down (28 bar max, 15 bar normal running)
> and to prevent overpressure on the existing lower piping and valves. Am
> forced to use a mechanical seal on the booster (3 stage) because of the
high
> inlet pressure and thats a worry. Its cheaper to put in a couple of km of
> transmission line than to upgrade the existing valves and lower pipeline.
> To minimise surge and permit reduced flow operation during booster pump
> outage, there will be a check valve in parallel with the pump. The booster
> will be about 2km downstream of the main lift pumps. The main lift pumps
are
> fitted with surge anticipation and, bless me, a pressure relief valve. The
> new booster/increased flow means that the main lift pumps will operate at
a
> lower pressure than they do now.
> Have any of you guys done anything similar? Did you have any unexpected
> issues? Any suggestions?
Received on Sat Oct 18 12:30:00 2003