A) A mechanical seal is a sealing device which forms a running seal between rotating and stationary parts. They were developed to overcome the disadvantages of compression packing.
Q) Why are they used for ?
A) They are used to reduce the leak/loss of material from the machine so as to meet environmental standards of government regulating agencies and to lower the maintenance costs.
Q) What are the advantages of mechanical seals over conventional packings ?
A) Advantages are as follows:
- Zero or limited leakage of product (meet emission regulations.)
- Reduced friction and power loss.
- Elimination of shaft or sleeve wear.
- Reduced maintenance costs.
- Ability to seal higher pressures and more corrosive environments.
- The wide variety of designs allows use of mechanical seals in almost all pump applications.
A)
- A set of primary seal faces: one rotary and one stationary, as seal ring and insert.
- A set of secondary seals known as shaft packings and insert mountings such as 0-rings, wedges and V-rings.
- Mechanical seal hardware including gland rings, collars, compression rings, pins, springs and bellows.
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