Booster Pumps

Question 1

Mercoids …….

Booster pumps typically have what type of mercoid switches?

Answer 1

Booster pumps typically have low suction ( with the two arms) cut out mercoids.

-> low suction mercoids have the ability to reset themselves, as once pressure builds up they rest ( this only occurs a certain number of times before someone is called out to check).

Question 2

What is NPSH

Answer 2

=Net positive suction head

To prevent cavitation and vapour binding, and to ensure maximum flow through the pump, suction pressure must be greater than the vapour pressure of the pumped liquid. This required pressure at pump suction is called the net positive suction head (NPSH).