Process Equipment and Plant Design
A stuffing box is used for

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

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Process Equipment and Plant Design
Pick out the wrong statement pertaining to the design of a horizontal tube evaporator.

Liquor flows inside the tube, while the steam is outside submerging the tube
Its usual dimensions are: tube dia = 2-3 cms; evaporator body dia = 1-4 metres and evaporator height = 2.5-4 metres
It is suitable for process, in which the final product is a liquor instead of solid
It is unsuitable for concentrating those liquids, which form a scale or deposit salt

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