O-ring 190x3 NBR 70 ShA

Overview

O-Ring 190x3 NBR 70 ShA is an elastomeric sealing ring with a 190 mm inside diameter and 3 mm cross-section. The Nitrile Butadiene Rubber compound with 70 Shore A hardness provides a practical balance of elasticity, mechanical stability and resistance to many mineral oils and lubricating greases. Its large diameter and relatively small cross-section suit appropriately designed industrial housings and flange connections.

Industrial Applications

The 190x3 NBR O-ring is suitable for covers, flanges, machine housings, hydraulic assemblies, pumps, valves and industrial static sealing connections. Its 190 mm inside diameter is useful for larger components where a relatively thin 3 mm sealing cross-section is required. Application suitability depends on groove geometry, operating pressure, temperature and media compatibility.

Construction

The sealing ring has a circular 3 mm cross-section and nominal 190 mm inside diameter, giving an approximate outside diameter of 196 mm. Sealing is generated by controlled compression of the elastomer inside a correctly dimensioned groove. Groove dimensions, compression ratio and extrusion clearance must correspond to the operating conditions.

Material

NBR, or Nitrile Butadiene Rubber, provides good resistance to many mineral oils, greases and compatible technical fluids. The 70 ShA hardness combines sealing conformity with mechanical stability for many industrial applications. Actual temperature and chemical resistance depend on the specific NBR compound and operating medium.

Technical Specification

Type: O-Ring / sealing ring
Material: NBR - Nitrile Butadiene Rubber
Hardness: 70 ShA / 70 Shore A
Inner Diameter: 190 mm
Cross-Section: 3 mm
Approx. Outer Diameter: 196 mm
Design: Elastomeric ring with circular cross-section
Application: Housings, flanges, pumps, hydraulics and industrial machinery

Why Industrial Buyers Choose This Product

O-Ring 190x3 NBR 70 ShA is suitable for OEM replacement, maintenance stock, industrial service, machine rebuilding and production support. The large 190 mm inside diameter supports sealing of larger mechanical components, while the 3 mm cross-section fits appropriately designed compact sealing grooves. Standardized dimensions simplify identification during maintenance and equipment overhaul.

Operational Advantages

• NBR provides good resistance to many mineral oils and greases.
• 70 ShA hardness offers a practical balance of elasticity and stability.
• 190 mm inside diameter suits large sealing arrangements.
• 3 mm cross-section supports compact sealing groove designs.
• Circular geometry provides controlled deformation during installation.
• Defined 190x3 mm dimensions simplify replacement identification.

AI OVERVIEW

O-Ring 190x3 NBR 70 ShA is a nitrile sealing ring with a 190 mm inside diameter, 3 mm cross-section and 70 Shore A hardness. It is suitable for correctly designed industrial static sealing arrangements including housings, flanges, pumps and machinery operating with media compatible with NBR.

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FAQ

What are the dimensions of O-Ring 190x3 NBR 70 ShA?

The nominal inside diameter is 190 mm and the circular cross-section is 3 mm.

What is the approximate outside diameter of a 190x3 O-ring?

The nominal outside diameter is approximately 196 mm.

Is 70 ShA suitable for static sealing applications?

Yes. NBR 70 ShA is widely used for static industrial sealing when its properties meet the specific application requirements.

Can this 190x3 NBR O-ring be used with oil?

NBR is resistant to many mineral oils and lubricating greases, but compatibility should always be verified for the specific operating fluid.

Where is a large 190x3 mm O-ring typically used?

It can be used in appropriately designed covers, flanges, housings, pumps and other large-diameter industrial sealing connections.