Mechanical Seals: How They Work

Mechanical seals are integral to the functionality and efficiency of various industrial systems. These contain fluid inside the components of a vessel or system, usually in a pump or mixing device. Though small, these seals play a big part in manufacturing processes across numerous industries and if one fails it can bring production to a halt and often create a spill which could be dangerous for employees if the fluid used in the system is hazardous to health. 

Here at TRP Polymer Solutions, we understand the importance that something as small and simple as a rubber seal has to your business and your output. We can help you source the highest-grade materials for your seals and create a bespoke design for your system, if that is what you require. We know mechanical seals, how they work, and how important they are to your systems. Let’s find out more about mechanical seals and how they work.

What is a mechanical seal?

A mechanical seal is a device used to prevent fluid leakage between rotating and stationary parts in machinery. It is an essential component in pumps, mixers, and other equipment where a shaft rotates through a stationary housing. The effectiveness of a mechanical seal is crucial to maintaining system integrity and preventing fluid leaks that could lead to significant operational challenges, and pose a threat to workers. The integrity of a mechanical seal is critical to its effectiveness, and any minor defect in a mechanical seal can cause a system to grind to a halt.

How do mechanical seals work?

The basic principle of a mechanical seal involves two flat surfaces running against each other, with one surface rotating with the shaft and the other remaining stationary. The seal prevents fluid leakage by maintaining contact between these surfaces, often assisted by secondary sealing mechanisms such as o-rings (including FFKM o rings and high temperature o rings) or gaskets. The choice of materials and design specifics are critical to the seal’s performance, especially in demanding environments with extreme temperatures or exposure to aggressive chemicals​. Any materials used in a seal must be rigorously tried and tested to make sure it can meet the demand of the business and maintain its integrity during long periods of use, standing up to the challenges that friction from the movement and chemical reactions can pose.

Recent changes in the industry

Recent industry changes, particularly in compliance with FDA regulations, have had a significant impact on the O rings used in mechanical seals and related components. The withdrawal of FDA approval for Bisphenol FKM materials has prompted a shift towards alternative materials that meet the stringent requirements of food (FDA approved seals) and drug applications​​. TRP Polymer Solutions has been at the forefront of this change, developing new materials that offer improved chemical resistance and are suitable for challenging environments. These new food grade materials have allowed our customers to keep operating in spite of these changes, maintaining their output and their high levels of food safety and hygiene.

TRP Polymer Solutions’ approach

TRP Polymer Solutions is renowned for its expertise in polymer technology and custom rubber product development. With a focus on high-grade sealing solutions, we provide our customers with optimal material selection and technical advice for various applications, including mechanical seals​​. Our approach to product development is comprehensive, encompassing everything from conceptual design to operational production, ensuring that each product meets the specific needs of the application. We work closely with our customers to ensure that our products are designed and manufactured to their exacting standards, from the design and prototype stages to full production.

Understanding mechanical seals and their function is critical for maintaining the efficiency and safety of industrial systems. With recent changes in the industry, particularly regarding material compliance and environmental concerns, it is more important than ever to stay informed and adapt to regulatory changes. 

TRP Polymer Solutions continues to lead the way in developing innovative solutions that meet the evolving needs of the industry. We provide a complete rubber seal production service, from design to implementation. Contact us today to find out how we can help you and your business ensure you are using the best mechanical seals possible, no matter what industry you operate in.