Types of Mechanical Seals in Pump

Types of Mechanical Seals in Pump - Power Plant Guruji

What are Mechanical Seals for Pumps

The Sealing of a rotating shaft passing through a pump casing is also achieved by means of a rotating, optically flat seat, rubbing against a stationary, optically flat seat.

Stationary seat is inserted into a gland plate or seal chamber and the spring loaded rotating face is mounted on the shaft.

The spring holds the rotating face against the stationary face and sealing occurs in between rotating and stationary parallel faces.

How many types of mechanical seals are there

Shaft mounted or cartridge type
Balanced and unbalanced type
Pusher and non-pusher type
Single and multiple seals
Externally and internally mounted seal
Single and multiple spring seal

Mechanical Seal Types

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A variety of seals are available for various application

Hydraulically balanced seals

A balanced seal compensate for higher pressure by locating seal faces such that stuffing box pressure has lesser effect on face closure

Cartridge type mechanical seal

A preassembled package of sealing components

Split seal

A radially split seal having all components split that can be assembled on the shaft without removing the same

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