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In rotary pumps these are usually called rotors, gears, screws or lobes, cam, wobble plate, sliding vanes. In centrifugal pumps they are known as impellers.

Related Terms

IMPELLER

The rotating wheel of a centrifugal pump.

SHIP'S STABILITY

The seaworthiness of a ship regarding the centrifugal force which enables her to remain upright.

CENTRIPETAL FORCE

The force directed toward the center of curvature, which constrains a body to move in a curved path. The opposite is CENTRIFUGAL FORCE.

LOCAL VERTICAL

The direction of the acceleration of gravity as opposed to the normal to the reference ellipsoid. It is in the direction of the resultant of the gravitational and centrifugal accelerations of the earth at the location of the observer. Also called PLUMB-BOB VERTICAL.

GRADIENT WIND

Any horizontal wind velocity tangent to the contour line of a constant pressure surface (or to the isobar of a geopotential surface) at the point in question. At such points where the wind is gradient, the Coriolis force and the centrifugal force together exactly balance the horizontal pressure force.

GEOID

The equipotential surface in the gravity field of the earth; the surface to which the oceans would conform over the entire earth if free to adjust to the combined effect of the earth's mass attraction and the centrifugal force of the earth's rotation. As a result of the uneven distribution of the earth's mass, the geoidal surface is irregular. The geoid is a surface along which the gravity potential is everywhere equal (equipotential surface) and to which the direction of gravity is always perpendicular. Also called FIGURE OF THE EARTH.

GEOPOTENTIAL

The gravity potential of the actual earth. It is the sum of the gravitational (attraction) potential and the potential of the centrifugal force.

SEALLESS PUMP

A centrifugal pump with impellers that have magnetic hubs to provide speed and positional control. Sealless pump should be installed so it has a ans. suction head.

GRAVITY DISTURBANCE

The difference between the observed gravity and the normal gravity at the same point (the vertical gradient of the disturbing potential) as opposed to GRAVITY ANOMALY which uses corresponding points on two different surfaces. Because the centrifugal force is the same when both are taken at the same point, it can also be called GRAVITATIONAL DISTURBANCE.

CYCLONE SEPARATOR

Separates entrained particles from the fluid steam by means of centrifugal force caused by changing direction.
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