Process Equipment and Plant Design
Power required for agitation depends upon the

Size of agitator & the tank
All of these
Height & properties of the liquid
Agitator type & speed of agitation

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Process Equipment and Plant Design
A stuffing box is used for

Reducing the resistance of fluid flow
Facilitating smooth opening and closing of a valve
Prevention of fluid leakage around moving parts
Absorbing the contraction/expansion of pipeline due to temperature changes

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Process Equipment and Plant Design
Generally, elliptical dished heads

Are approximately as strong as seamless cylindrical shell having the corresponding I.D and O.D
Are manufactured on 2:1 ratio of major to minor axis and is recommended to be used for pressure vessels operating above a pressure of 1.5 MN/m²
All of these
Resist half the pressure rating compared to hemi spherical head provided on the cylindrical shell of the same thickness and diameter

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