Lynn

Have tried the sail switches in the flow stream, but because of the material I pump they just do not work.  Material is piggery effluent carrying all sorts of debris which is what blocks the pumps.  Appreciate you suggestions but sadly they do not work in this world.Thanks all the same.  Neil.

OK, put the sail switch on the outlet side and have it drop out the relay on a no flow, or low flow condition.

Pump never over heats. Reset the relay to regain flow after clearing the inlet.

I used to build custom "Heat transfer packages" for large buildings.

Lynn E. Hanover

In a message dated 8/13/2019 2:48:03 AM Eastern Standard Time, flyrotary@lancaironline.net writes:

Lynn,

                 No we have to reset the pump manually as the usual cause is blockages in the suction.  They have to be removed and then reset.  The temp rise is in the pump and the motor is always fine after it has cooked the pump as usual.

Thanks,  Neil.