Mechanical seal training pdf

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Typical Centrifugal Pump

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1. Suction
2. Impeller
3. Discharge 
4. stationary Casing
5. Rotating Shaft
6. Mechanical Seal in Stuffing Box
7. Gland

Radial & Thrust Bearings to Support the Shaft Must be lubricated at all times.

Pump Pressures

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Suction Pressure

The actual pressure, positive or negative at the pump suction connection as measured on a gage.

Discharge Pressure

The actual pressure at the pump discharge connection as measured on a gage. It is equal to the pump suction pressure plus total head developed by the pump.

Stuffing Box Pressure

The pressure acting on the stuffing box which must be sealed. It is a function of pump impeller design and the presence or condition of 

wear rings.

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