Technical O-Ring Seals According to PN-90/M-73092 Standard

O-ring seals are circular sealing rings with a toroidal shape — that is, both the ring and its cross-section are round. This simple yet effective geometry makes O-rings one of the most widely used sealing solutions in industrial applications.

At POWER Rubber, we manufacture O-rings from a variety of elastomers, including FKM (Viton®), VMQ (Silicone), NBR (Nitrile), and EPDM, in different hardness levels. The material hardness is selected based on the system pressure and the width of the sealing gap. Depending on the material, O-rings offer excellent gas-tight sealing, resistance to high temperatures, and chemical compatibility — all essential for demanding environments.

O-Rings Made to ISO Standards – Versatile and Durable

ISO-compliant rubber O-rings feature flexibility and elasticity, allowing them to adapt to both static and dynamic applications. Their main purpose is to prevent unwanted leaks of working media such as liquids or gases, while also protecting equipment from contaminants like dust, moisture, and metal particles.

O-rings are widely used in machinery and equipment across many industries. They are essential components for ensuring tight seals in mechanical systems, especially where consistent performance and safety are critical.

PN-90/M-73092 – The Polish Industrial Standard for O-Ring Seals

The PN-90/M-73092 standard defines the specifications for circular cross-section sealing rings used in hydraulic and pneumatic control and drive systems. These O-rings are designed to provide clamping seals in both static and moving joints in hydraulic and pneumatic devices, as well as other mechanical connections.

This standard outlines the requirements and testing procedures necessary to ensure that high-quality sealing products are delivered. Seals compliant with PN-90/M-73092 are recognised for their precision, durability, and reliable performance in industrial applications.

Dimensions and Designations – How to Read O-Ring Specifications

Here is an example of how to specify an O-ring according to PN-90/M-73092:

20x2 FKM 80 S PN-90/M-73092, where:

• Inner diameter (D) = 20 mm

• Cross-section diameter (d) = 2 mm

• Material type = FKM

• Hardness (Shore A) = 80

• Performance class = S (for special applications)

• Standard = PN-90/M-73092

These standardised designations ensure clear communication and accurate selection for engineering and procurement teams.

Need High-Quality O-Rings to PN-90/M-73092?

Looking for reliable O-ring seals that meet PN-90/M-73092 specifications? Contact our technical team at POWER Rubber — we’re here to help you select the right sealing solutions for your system.