What Is The Working Process Of Sanitary Pump Seals?

Mechanical pump seal is an end faces mechanical seal. It is a type of seal used in rotating equipment, such as pumps, mixers, blowers, and compressors. Mostly used for water pumps prevents product leakage around the pump shaft with two very flat surfaces. It is designed and featured in a way where the pump seals can be use for sanitary purposes.

What Does Sanitary Pump Seals Work?

• A shaft seal is required in the rotating shaft as it prevents leakage of product into the different atmospheres.
• The pump seals serve here serves as a barrier between the pump casing and the atmosphere. For sanitizing any space, the first step taken is to prevent all the leakages.

What Are The Two Most Significant Sanitary Seal Designs?

Lip or O Ring Seal: It is straightforward in design as this is made using rubber ring sliding against the shaft. Typically positioned using a slot in the shaft, it consists of a shaft sleeve as well. This seal design features low-pressure differential and low speed applications. This type of seal is effective in low pressure, slow running positive displacement pump applications. Not compatible for sanitary centrifugal applications because of the shaft speeds between 1750 and 3600 RPM. It is one of the most effective seal which is priced low, easy to maintain and repair.

Mechanical Pump Seals:

The focuses more on the mechanical shaft seal. It consists of two main components: a rotating part named seal ring and a stationary part called as the seal seat. The stationary seal seat is used for fixing the pump housing. The rotating ring is pressed axially through a spring against the stationary seat. The tiny space between the seal faces is called the seal gap. The seal faces are pressed against one another, while the pump shaft is not moving.

The pump shafts are very essential part as it only starts rotating when the differential pressure is created between the pump chamber and atmosphere causes the seal faces to separate. The pressure differential draws product between the stationary and rotating seal faces to create a lubricating film. This fluid film created in the process serves to lubricate and cool the seal faces. It also helps in preventing wear.

The whole process of pump seals are a critical one which where the design and the installation need to be on point otherwise, the low pressure and high temperature in the seal gap will cause harm to the entire process. A poor design can lead to the pump to leak. The rate of leakage can be determined by variety of factors like the surface roughness of seal faces, vibration and stability of the pump, flatness of seal faces, speed of rotation, viscosity, temperature, and type of pumped media, pump pressure, and seal design and assembly. Therefore, it is very important to check the designs before you buy.

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