FEB 2006

as reported by Mark Dye

P6001AP6001B

P6003A

N

East firewater

pond

West firewater

pond

P6003B

P6002B P6002A

East isolation

gate

West isolation

gate

Pump house layout

Unpacking P6001A

This is the pumps hydraulic end

With the pump submerged, the water flows up through the shaft housing

The business end!

The pump and first pipe spool being lowered into the well…

…into the icy water below

Looking down through the spool to the pump top below

A shaft bearing is installed between each pipe spool and clamped between the flanges

The bearing is water lubricated and made of PTFE

The shaft joining piece has a left hand thread!

The next pipe spool is lowered into position

Jointing compound

The flanges are bolted together,

then torqued down to 175 ft-lbs.

The support is opened,and the pump is lowered.

With all the parts assembled we have…The pump at approx 2.5 metres

Three spools at 1.7 metres each

One spool at 1 metre

Giving a total of

8.6 metres

Now we need the stuffing box assembly

The stuffing box assembly is unpacked,

And the top bearing assembly removed.

The top bearing assembly is keyed to the shaft because it also contains a ratchet device to prevent back turning of the shaft.

STEADY AS SHE GOES!!!

Thread the shaft through and line up the spool bolts.

The whole assembly now needs to be lifted to remove the spool support. The combined weight is now 3.7 tonnes.

The top bearing is re-installed and

keyed to the shaft.

The coupling housing and motor stand installed.

The coolingwater supply,

…and return, and constant level oiler is fitted.

10kv Electric motor installed

PUMP SPECIFICATIONS

Pump speed 1480rpmTest pressure 33bargRated flow 240 l/s (864t/hr)Head 158.4 mtrs. (15 barg)

The jockey pump is exactly the same as the main pumps,

…only in miniature!

The pump had it’s first test run…

…flushing firemains into the night!