Grundfos training

[MOSSEP]

Hi.,

Has anyone here done any of the Grundfos pump training courses? Ive got a site with 2no twin pump sets that are leaking and need a service, I wanted to know if the courses gave enough insight to strip down and assess what is wrong with them.

On a side note, anyone on here get involved with large commercial stuff in the medway and swale area?

 

[oz-plumber]

What type of pumps are they?
Model No.
If its pump glands leaking - fairly easy if you have done it once.

 

[chris watkins]

Hi MOSSEP
I have to say that I have not done the course but they will almost certainly show you what you require.
I have replaced shaft seals on a number of different booster pumps in the past & it straight forward on most (buy the kit & have a go).
There are, (or were) company's out there who will refurbish them off site depending on the down time you have or if you have duty / stand-by sets.
What are the pumps you have, vertical multistage ? & were are they leaking from?

 

[Plumbstar Tom]

shaft seals often fail due to aeration so check the install

 

[MOSSEP]

They are grundfos tped 4-270/2.

They appear to be leaking where the shaft enters the pump housing, they don't leak all the time, and also only do it when the pump is running.

Here's a pic of one of the pump sets



Here's a close up of where the leak comes from

 

[rpm]

Not familiar with that model but as a rough guide to mechanical seal leaks.

Wrong rubbers with wrong chemicals, wrong seal faces with wrong chemicals.
Housing for stationary seal seat corrosion, shaft damage under rotary seal, shaft not running true.
Debis between seal faces, seal faces damaged from overheating caused by running dry, broken spring on rotary seal assembly, incoming flow less then output, motor bearing damage, loose bearings covers the normal suspects.

 

[rpm]

Just noticed they only leak when the pump is running so possible shaft not running true or motor bearing damage. Could be fine when stationary because often there is a slight forward motion when a pump starts up therefore seal face could be pulling apart.