You cannot underestimate the importance of mechanical seals in any engineering project because it is a requirement for most activities like laying pipelines. Getting the right mechanical seal for the right job becomes a problem if you do not know what to consider in making your choice. You might be lucky if the project specifies the type of mechanical seal that is appropriate and you would directly go for it. However, there are no such specifications, and it is your responsibility to make a choice, then you will require some little knowledge on various types of mechanical seals and different occasions when they are suitable.
Most of the mechanical seal manufacturers and suppliers are always ready to help a client make the right choice of mechanical seal that they want for the project. In as much as the manufacturers and suppliers can assist you, you can still end up with the wrong type of mechanical seal because they do not understand your project and its components well. You own the project and know every detail about it, and therefore, it would be best to some basic information about mechanical seals that would help you in choosing the right seal for your project.
In the stores, you will come across various types of mechanical seals. Most engineers use the hydraulically balanced seal. The advantage of using the type of seal is that it does not produce lots of heat and it can handle high pressure. You need to make certain considerations before purchasing this seal, and for instance, you will have to calculate the estimated pressure in the pipe and if it exceeds 400 pounds per square inch then it best that you use it.
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There is also a stationary mechanical seal which is suitable for projects that have misaligned connecting machines. For instance, a pump and its driver or a stuffing box that does match its rotating shaft. Stationary is appropriate in a case where you have a pump operating at high speed.
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In the course of operating some machines, they can produce heat or some projects are done in areas of high temperatures and in such cases, the best seals to use are the metal bellows. They might not only be useful in high-temperature areas, but they can also be helpful in conditions of extremely low temperatures.
Dual mechanical seals are the best for machines that have two way systems. The seals can be used for emergencies such as shutdowns or power outages.
Non-metallic seals are necessary for connecting none metallic parts such as plastics, Teflon, and carbon. You can count on them to effectively seal whatever liquid or gas that is in the pipe. These types of mechanical seal are less costly compared to metallic ones, and they are available in most stores.