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johncarter
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Asked: 2023-11-28T19:12:44+05:30 In:

What is the difference between mechanical seal and gland seal?

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Differentiate between mechanical seal and gland seal?

mechanical seal
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    1. Feature Mechanical Seal Gland Packing
      Principle of operation Utilizes two opposing sealing faces that create a non-contact seal through hydrodynamic lubrication or face contact. Relies on the compression of packing material around a rotating shaft to prevent leakage.
      Leakage rate Minimal leakage, often achieving near-zero visible leakage rates. Of course, there can be a leakage of process fluid through vaporization. The vaporization is due to the heat generated between two mating seal faces. Moderate to high leakage rates, requiring periodic adjustment. The allowed leak rate is 10 drops per minute. This leakage rate is considered acceptable because it allows for proper lubrication of the packing material and prevents excessive wear and tear on the pump.
      Pressure and temperature tolerance Capable of handling high pressures and temperatures. (Max pressure 65 bars, and Max Circumferential speed 55 m/s) Limited pressure and temperature tolerance. (Max pressure 25 bars, and Max Circumferential speed 25 m/s)
      Durability Highly durable and long-lasting. Requires more frequent maintenance and replacement.
      Applications Suitable for critical applications where minimal leakage is crucial, such as pumps handling hazardous or expensive fluids. Commonly used in low-pressure applications where leakage is less critical.
      Cost Relatively expensive initial cost. Low initial cost but higher maintenance costs over time.

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