Introduction To Agitator Seals - A Definitive Guide

If Agitator mechanical seals are not proper, it can lead to a high risk of product contamination in various industries, mainly in pharmaceuticals and food industries. Product contamination can easily degrade product quality or can also make it useless.

Agitator seals are used in distinct sectors that mainly include vessels, glass-lined vessels, blowers, and reactors. The Agitator mechanical seals work in various environments hence, we design them keeping the various environmental condition in mind, which becomes very important.

Popular Pump Seals is a leading agitator mechanical seal manufacturer in India, designing seals according to your process, environment, and pressure requirements. 

Considering every requirement and using cost-effective technology, we assemble agitator seals that can provide effective performance in your industry.

We offer much more than these; browse through this blog and learn what is agitator mechanical seals, their benefits and applications, and also some important factors to consider when buying agitator seals with easy ways to avoid seal failure.

What Is An Agitator Mechanical Seal?

Agitator Mechanical seals are factory-made cartridge units operated on mixtures, agitators, and reactor vessels for corrosive and hazardous compounds throughout the reaction process.

Strongly designed with vibration-isolated faces to withstand conditions of drag and shear that destroy common seals. The agitator mixer offers excellent tolerance of motion and has the capabilities to bear the instant pressure shift.

The Agitator mechanical seals are independent of the direction of rotation and have robust bearing support to drive smoothly and protect the seal faces from loads of other equipment parts.

The seals have interchangeable parts and can be converted by changing the dynamic ring and secondary seals, making them compatible with a wide range of applications.

At Popular Pump Seals, we develop Agitator seals that are precisely designed in accordance with construction specifications to deliver optimum performance even in high vacuum conditions.

What Are The Applications Of The Agitator Seal?

Agitator Mechanical seals have a wide range of applications; some of agitator mechanical seal uses are,

  • Food Products
  • Gas
  • Corrosive Chemicals
  • Pharma
  • Vapors

Salient Features:

  • Sturdy construction
  • Long Life Performance
  • Corrosion resistant
  • Consists hardness
  • Dimensionally accurate
  • Temperature resistant
  • Abrasion resistant
  • Leakage proof
  • Independent of direction of rotation
  • Low Maintenance
  • Require Less Space 

Technical Specifications Of Agitator Mechanical Seals: 

Face Materials

Carbon, Ceramic, SS, Silicon Carbide, Tungsten Carbide, Stellite

Secondary Material

Viton, EPDM, Silicon, Kalrez, PTFE, TCV, FEP, TTV


SS 316, SS 304, Hastelloy

Shaft Dia

25 mm to 200 mm


VACUUM UP TO 35 Bar (KG/Cm2)


UP TO 260 Deg

What Are The Types Of Agitator Seals?

There are specifically four types of Agitator Seals, 

  • Dry running seals
  • Gas-lubricated seals
  • Liquid-lubricated seals
  • Shut-down seals

Working Principle of Agitator Seals:

An Agitator seal is a device used to yield a seal between a rotating and a stationary part on an Agitato, Mixer, and Vessel. An agitator seal creates a restrictive flow path when processing. This restrictive flow path created is either an axial or radial gap.

Factors to Consider When Selecting An Agitator Seal:

If you want your Agitator mechanical seal to operate for many years without any issue, then you must know the various factors to consider when selecting them for your applications.

You must identify the seals’ operating conditions, the material of construction, its performance life, and many more other factors.

Below we have listed the important factors to consider for preventing improper seal selection.

  • Temperature:

It is important to consider the temperature the seal material can handle. If the selected seal can not bear the higher temperature, then it won’t be able to handle the higher temperature liquid.

  • Liquid:

Identify if the seal material is chemically compatible enough to handle the fluid and check if there is any risk of failure.

  • Pressure:

Choose the right type and size of the seal that is suitable for the pressure rate of your application.

After checking all these above-mentioned operating conditions, other characteristics to notice are;

  1. Temperature constraints
  2. Chemical resistance properties
  3. Flexibility 
  4. Wear resistance
  5. Thermal expansion and conductivity properties
  6. Wear resistance
  7. Low leakage & friction properties
  8. Good thermal properties
  9. Corrosion resistant
  10. Seal type and accuracy
  11. Stationary or rotating seal
  12. Arrangement of the seal
  13. Orientation and configuration of the seal
  14. Material
  15. Bushing

What Causes Agitator Mechanical Seal Failure and How To Avoid That?

Reasons why the agitator seal fails?

1. System failures due to operating mistakes such as;

  • Setting too low or high pressure
  • Drive problems
  • Running agitator at blade level with liquid 

2. Installation errors such as;

  • Dirt on the seal face
  • Wrong seal usage
  • Over-tightening fasteners
  • The seal is not mounted properly
  • Wrong assembly length
  • Hammering couplings 
  • Shaft misalignment
  • Axially moving shaft

3. Poor lubrication

4. High chemical and physical demand

How to Maintain the Agitator Seal?

  1. Understand your Conditions
  2. Know Seal Face durability with Liquid
  3. Know the reason for Seal Face Wear
  4. Reduce Vibration
  5. Proper Lubrication


Every seal has a different application, and for all that, we have the right solution. At Popular Pump Seals, we understand the process conditions and other operating and cleaning requirements, hence delivering the right Agitator Mechanical seal that has proven reliable for long periods.

Being a leading manufacturer of Agitator Mechanical seal; in Ahmedabad, Gujarat, India, we provide the industries with cost-effective technological advances that improve equipment performance. With quick and skilled engineering support, we deliver the right face technology for the right application.

So if you need the most suitable Agitator Seal for your application, request your FREE quote now.

To know more about our wide range of mechanical seals, visit our website:   

Recent Posts

+91 90818 11644