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Mechanical seals

Mechanical seals

The mechanical mechanical seal is an advantageous replacement for the stuffing box. This product allows you to ensure less leakage of the working medium, while allowing maintenance to be carried out less often, reducing the risk of wear on the surface of the shaft or the sleeve for protection.

The mechanical seal is more effectively used to seal the pressurized cavity of various types of equipment, including:

The design of such a product is quite clear. It contains two rings of a friction pair. At the same time, the rotation surfaces are placed coaxially and perpendicular to the axis of the rotating shaft.

Mechanical seal of the pump shaft

Is the mechanical seal suitable for different pumps

Yes, the mechanical seal is suitable for submersible pumps and surface-mounted pumps. This product performs the function of sealing. That is, in the first case, it does not allow liquid to get out of the device, and in the second it does not allow liquid to flow into the electric motor in order to eliminate the risk of a short circuit.

Range of mechanical seals

All products on our website are divided into categories. Here you will find mechanical seals for pumps and mechanical seals for agitators, hoppers and conveyors. In addition, in a special section of the site there is a catalog of all products and a catalog of analogs of mechanical seals.

There are mechanical seals:

  • Collapsible;
  • Katridge;
  • Balanced;
  • Unbalanced.

The distribution takes place according to the design features of the product. They can also be divided according to the nuances of the working environment, then the classification will look like this:

  • Liquid;
  • Dry;
  • Gas;
  • With an internal location;
  • With an external location.

Special attention should be paid to the last two points. Mechanical seals with an internal arrangement are used in cases where the working medium has direct contact with the outer surface of the product. External mechanical seals are used if the working medium is placed between the inner part of the product and the shaft that rotates.

We have mechanical seals for pumps of any model on our website:

For more information about what products we sell, look in a separate category.

What materials are end products made of

A wide range of mechanical seals implies the performance of tasks of different directions. This means that different products need to be used for different purposes and the material will depend on the characteristics of the pumping fluid, temperature and pressure strength.

Thus, in the production of mechanical seals, the following are used:

  • Silicon Carbide;
  • Aluminum Oxide;
  • Tungsten Carbide;
  • Graphite impregnated with metals;
  • Graphite impregnated with synthetic resins;
  • Ethylene-propylene rubber (EPDM);
  • Viton (FKM);
  • Nitrile butadiene rubber (NBR).

The scope of application of the product, the duration of its operation, and the features of application will depend on the material of the mechanical seals. Look for more specific data in the product description.

Advantages of using mechanical seals

There is a tendency in the world to replace the stuffing box with mechanical seals. The reason for this is the list of advantages, including:

  • The ability to provide a strong and reliable sealing of the shaft;
  • The ability to reduce the cost of operating the device;
  • The possibility to avoid the need for additional finishing of parts for sealing during installation;
  • Ability to carry out work in an aggressive external (working) environment, including abrasive;
  • A wide range of interchangeable parts that can be used if necessary.

Mechanical seals are an effective way to reduce losses when pumping liquid, due to the high level of sealing.

Features of the operation of mechanical seals

The principle of operation of mechanical seals is not particularly complicated. Perfect tightness is achieved by creating contact pressure with the help of an elastic element. Such an element can be a spring or a set of compression springs.

In order for the tightness to be the most complete, the so-called secondary seals are used in the form of:

  • Rubber rings of round cross-section;
  • Bellows;
  • Cuffs made of elastomers.

When can the mechanical seal fail

Be careful when using mechanical seals. The most common reasons for the loss of product performance are:

  • Mechanical seal wear. The wear of the mechanical seal comes with time and, according to statistics, about 30% of products have failed precisely because of this reason.
  • The wrong method or scope of use. If you have chosen the product incorrectly, there is an increased risk of rapid wear. In 15% of cases, this reason was the cause of the breakdown. To prevent this from happening, please contact our managers for advice.
  • Lack of lubrication. The occurrence of the so-called "dry run" is also the cause of failure in 15%. Do not forget to prevent the serviceability of air intake systems and automation.
  • Sticking of the seal is the cause of failure in 15% of cases. So that this does not lead to negative consequences, from time to time you need to scroll the shaft or turn it on for a short time.
  • Incorrect installation of the mechanical seal. In case of incorrect installation of the mechanical seal or errors during installation, a breakdown occurs in 10% of cases. Entrust this process to a specialist or carefully monitor your actions during this process.

The mechanical seal is one of the most quickly worn elements of the pump. In order for it to serve you longer, try to carefully take care of your device or buy several products at once for timely replacement.

Duration of operation of the mechanical seal

It is difficult to say how long the mechanical seal can last. This is influenced by a large number of independent factors: the same model can work properly for different times, depending on the operating conditions.

The reliability of mechanical seals depends on the following factors:

  • Nuances and features of the product design;
  • Materials used;
  • Correct installation and installation;
  • Working environment conditions;
  • Conditions and accuracy of operation;
  • Technical condition of the product;
  • Sufficiency of heat removal.

The influence of these factors can both extend and significantly reduce the service life of the product. All of them can lead to the phenomenon of accelerated wear, damage to parts, rapid aging and deterioration of the secondary sealing elements.

In order for the service life to be as long as possible, you should:

  • It is rational to choose a design;
  • Choose the right materials for the friction pair rings;
  • Pay attention to secondary sealing parts;
  • Provide mandatory operating conditions;
  • Make sure that the products are installed correctly.

Remember that the mechanical seal is not a universal product, so you need to choose the right model for work.

How to choose the type of mechanical seal

It is necessary to make a choice of a mechanical seal on the basis of engineering calculations and taking into account the past experience of using the product. Thus, you can guarantee that your product will last a long time, efficiently and effectively.

When choosing a mechanical seal, pay attention to the parameters of the working environment and the features of the product operation. If you have a negative experience with mechanical seals, that is, it failed after 1-3 months of use, you should conduct an examination to find out the reasons.

Why do you need to buy a mechanical seal from us

Hurry up to buy a mechanical seal from us. Order a consultation or download the catalog right now, if professionalism is important to you. We are for convenience from the procedure of searching for the necessary product, so we have created an intuitively simple system of categories and subcategories, to the order procedure. We also offer a favorable price and delivery to anywhere in the world.

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