You've never bought a Salus pump then Tony.
I would be very reluctant to take something said by a salesman for a manufacturer as definitely correct.
Most pumps can work at any power up to their rating for any proportion of the time.
The only part of a pump to fail is the bearing and when turning there is no stress at all on the bearings apart from any small out of balance pressure regardless of how hard they are pumping.
The winding have exactly the same stress on them all the time and that has no effective effect on the life expectancy.
Pumps can theoretically work for ever apart from bearing wear and that is usually accelerated by dirt in the water.
Tony
when turning there is no stress at all on the bearings apart from any small out of balance pressure regardless of how hard they are pumping.
.and as for you Bernard...I wouldn't trust you to change a light bulb unless logged into Google.
And by the way..... bulbs grow in the earth, even the heavy ones.
......He's a fooking cracker!!There is some small asymetrical lateral pressure on the bearing due to a reactive force that is equal and opposite to the force that is pushing fluid out of the impellor chamber. This does lead to some uneven wear in the bearing with more wear on the side of the bearing opposite the exit port. Some centrifugal pumps have double volutes to reduce this effect.
Read all about pumps https://www.myodesie.com/wiki/index/returnEntry/id/2960
and Mr Bernoullis and his formulas for luid flow rate https://www.myodesie.com/wiki/index/returnEntry/id/3006
Heat transfer help https://www.myodesie.com/wiki/index/returnEntry/id/2993
Stick in 22mm main F&Rs, you know it makes sense!!
Do we prefer big tits or tits just big enough to feed a baby?
Maybe that's the 8 pints of San Miguel talking
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local