Card Set Information
Study for Utilities course
The vertical distance equal to the pressure at a specific point
Maximum height that water will rise?
The formation & collapsing of air or gas bubbles on the blade of impeller or the gate of a valve
what is an impeller?
A rotating set of vanes on a pump or compressor shaft designed to move water or air.
The positive pressure on the suction side of a pump. Measure in feet or psi
The snail or spiral shaped casing surrounding the impeller on a pump or blower.
Tank or pit where wastewater or water is collected
Never run this pump on a closed head or discharge
Types of reciprocating pumps
Pump that has an intermittent flow...
is a reciprocating pump
Most frequent pumping problem on centrifugal pumps
These pumps operate by increasing the liquid velocity and converting the higher velocity into pressure by narrowing the discharge flow passage
This pump must never be started untill it has been primed
pump that consists of an impeller attached to a rotating shaft that is enclosed in a casing or volute
Most common pump in a wet well?
What happens when seals fail on submersible pump?
the motor may short or cause burns motor
How do coupled pumps differ from other pumps?
the pump and motor are one unit.
Vertical turbine pumps
1. motor on top attached to pump by a shaft.
Main pump parts
also known as "packing". It prevent leaking around a shaft.
connects the pump to the prime (motor)
What do Bearings do?
They allows the constrained relative motion between two or more parts, typically rotation or linear movement
How does cavitation occur?
Cavitation occurs when cavities of air (bubbles) form at the suction of a pump
what is vane passing syndrome?
it is when the impeller liquid clearance is to small causing vaporization. The impeller can become damaged.
international Standarization Organization
Total Acid Number
The measure of the oxidation that the fluid has undergone since startup
Lubrication - water
water in lubrication is its worst enemy.
Lubrication - Metals