DIN 28-137 Non-Metallic Reactor Seal

In the demanding world of chemical and pharmaceutical processing, reliability and compatibility are everything. Reactor seals must withstand aggressive media, maintain integrity under pressure and temperature changes, and integrate seamlessly with glass-lined reactors. The Reliability Engineering DIN 28-137 non-metallic reactor seal with integral glass-lined flange is engineered precisely for this challenge — combining proven mechanical performance with the highest level of corrosion resistance and process adaptability.

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Engineered to DIN 28-137 Standards

Built in accordance with the DIN 28-137 dimensional standard, this seal series ensures interchangeability across a wide range of reactor designs and drive shaft configurations. Available in sizes from 40 mm to 161 mm, it covers all shaft diameters defined under the DIN standard, making it a versatile solution for both new installations and retrofits.

The integral glass-lined flange provides a robust, corrosion-proof interface with the reactor head — eliminating the galvanic and chemical incompatibilities often associated with metallic flanges. This design ensures long service life, minimal maintenance, and excellent cleanability, essential for sanitary or high-purity applications.

Non-Metallic Construction for Ultimate Corrosion Resistance

The seal’s non-metallic wetted parts construction provides outstanding chemical resistance against a broad spectrum of aggressive media, including acids, alkalis, and solvents. The non-reactive materials prevent contamination and are ideal for applications where product purity and process safety are non-negotiable.

By removing metallic components from the wetted path, the seal ensures that there are no exposed metallic surfaces in contact with the process fluid — a key requirement in modern glass-lined reactor systems.

Flexible Technology: Dry or Wet Seal Face Options

Depending on process conditions, the DIN 28-137 seal can be supplied with dry-running or wet-running face technologies:

Dry Seal Face Technology: Ideal for processes where leakage or contamination from barrier fluids must be avoided. These designs minimize frictional heat and extend seal life even in vacuum or intermittent service.

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Advanced Configurations for Process Control‍

The seal can be customized with a variety of engineered configurations to match specific operational requirements

• Spherical or Ball Bearing: Offered in two bearing configurations, for all shaft load carrying capabilities.
• Cooling/Heating Seal Jacket: Maintains uniform and idealised temperature of the Barrier Fluid (Wet) and seal faces

• Cooled Stationary Seal Faces: Ensures stable thermal conditions and extended seal face life in high-temperature or exothermic processes.
• Barrier Fluid Pumping Ring: Enhances the circulation of barrier fluids for optimal cooling and lubrication, improving reliability in continuous operation.

Each configuration is available with compatible materials and optional instrumentation to integrate seamlessly with existing process control systems.

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Reliability, Safety, and Cleanability in One Package

The DIN 28-137 non-metallic reactor seal with integral glass-lined flange represents the next step in process sealing technology — combining mechanical precision, chemical resistance, and modular flexibility. It ensures safe, leak-free performance in environments where downtime is costly and contamination is unacceptable.

Whether for fine chemicals, specialty polymers, or pharmaceuticals, this seal provides peace of mind through engineering excellence — keeping your process sealed, clean,and compliant.

For expert guidance on selecting the right DIN 28-137 reactor seal configuration for your process — from dry-running to wet-running applications — contact the team at Reliability Engineering Industries to ensure lasting performance, chemical resistance, and reliability.