Dear Customers and Business Partners,

Thank you for your interest in our products and services. Effective October 28, 2025, the DMH Group was acquired by the Freudenberg Group. The operational business of the DMH Group will continue as usual. Detailed information about Freudenberg Sealing Technologies and the Freudenberg Group can be found at www.fst.com.

As part of the integration, we will also update the design of our website. You will continue to find an overview of our products and services.

If you have any further questions, please contact your representative or send us a message via our contact page.

Seals
DMH Dichtung Stangendichtung

The product

The rod seal is the most critical seal in a cylinder and must withstand high pressures. It seals the piston rod as it extends and retracts and prevents the pressurized operating medium from escaping from the cylinder into the environment. In doing so, it leaves part of the entrained fluid film on the sliding surface of the rod. This protects the piston rod against corrosion. At the same time, the sealing edge of the rod seal and the scraper lip of the scraper are lubricated.
DMH brand rod seal systems offer high efficiency and durability. They consist of rod seals and pre-seals. Depending on the application, they are designed as single-piece groove rings or lip seals, or as multi-piece compact sealing systems made of low-friction high-tech materials.

Overview

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Seals

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