Design And Operation Of A Pusher Mechanical Seal

Pusher mechanical seals are a type of mechanical seal used in pumps and other spinning machinery. They help to stop the leakage of fluids like water, oil, or chemicals.

They are referred to as a "pusher" seal because it employ a number of secondary seals or "pushers".

They exert pressure on the primary seal faces and keep a tight seal. The installation and upkeep of usher mechanical seals may also be done by the pusher mechanical seal manufacturer.

The principal seal faces come into direct contact with one another and stop fluid from leaking out of the pump. They are components of the seal. Typically, silicon carbide or tungsten carbide are used to make these faces. This is because they are hard and wear-resistant.

Create Mechanical Pusher Seals

In order to stop fluid leakage from the sealed chamber, a pusher mechanical seal design is made up of numerous parts that act in concert. Following is a discussion of a few key design considerations for pusher mechanical seals:

Seal Face

In the pusher mechanical seal, the seal faces are the main sealing components. To stop fluid leakage, they are in close proximity to one another and form a barrier. Carbon, ceramic, and tungsten carbide are the most typical materials utilized for seal faces.

The type of fluid that needs to be sealed, the environment in which it will operate, and the machinery themselves all influence ‌material choice.

Springs

The spring supplies the force required to keep the seal faces in contact with one another. Stainless steel and castello are only two of the many materials used to create springs. Depending on the application, a spring design could be single or multi-spring.

The Housing And Seal Gland

The seal gland and housing are developed. It sustains the mechanical seal and generates the necessary pressure. This keeps the seal faces in contact with one another. Stainless steel, carbon steel, or hastelloy are frequently used in their construction.

Face cooling and lubrication are necessary in high-temperature or abrasive applications to prevent early wear and seal failure. A fluid or gas can be introduced between the seal faces. It cools and lubricates the seal, or heat and debris can be removed by using a circulation system.

Function of Mechanical Pusher Seals

Using two flat or slightly slanted seal faces that are forced together with a spring force to generate a seal. This is the basic idea behind how a pusher mechanical seal functions. To avoid direct contact and friction, a thin fluid film is positioned between the seal faces and the equipment shaft.

To maintain an efficient seal, the spring force applied to the seal faces and the fluid pressure delivered to the seal faces must be balanced. It is possible for the seal faces to separate and leak if the pressure is too high. The seal faces may prematurely wear if the pressure is too low, however, due to heat and friction.

Conclusion

Chemical processing, water treatment, and the extraction of oil and gas are just a few of the industries that frequently employ pusher mechanical seals. Pusher mechanical seals are typically regarded as dependable and durable. They have a little chance of leaking and little need for maintenance.