NBR Gasket Material Properties
Resistance to Mineral Oils
NBR compounds are commonly used in sealing interfaces exposed to mineral-based lubricating oils, hydraulic oils, and industrial greases. Compatibility should be confirmed against the specific fluid formulation and operating temperature.
Hardness & Compression Behavior
Different NBR hardness grades provide different levels of deformation under assembly load. The selected grade should match the joint design and required sealing contact.
Abrasion Resistance
NBR offers useful resistance to wear and surface damage in suitable mechanical applications, particularly where the gasket may experience handling or minor movement during assembly.
Temperature & Aging Considerations
Heat exposure and prolonged compression can affect elasticity and service life. The operating temperature range should be established according to the selected compound and actual working conditions.
Chaoyue supports custom NBR rubber gasket production according to technical drawings, physical samples, or defined application requirements. Custom development focuses on matching the gasket geometry and material specification to the customer's assembly rather than relying solely on standard dimensions.
- Drawing-Based Dimensions - Inner diameter, outer diameter, overall thickness, mounting-hole positions, cut-outs, and external contours can be specified from engineering drawings.
- Material & Hardness Specification - NBR compound and hardness can be selected according to the contact fluid, operating temperature, compression requirements, and mechanical conditions.
- Geometry Adaptation - Non-standard outlines, multiple apertures, and specific edge profiles can be developed to correspond with flange faces, equipment housings, and mating components.
- Sample Review Before Production - Existing gasket samples or prototype parts can be used to review dimensional fit and assembly compatibility before confirming production specifications.
Gasket Shapes & Structural Options
Flat Gaskets
Die-cut or otherwise cut from rubber sheet for use between flat mating surfaces, with the outer contour and openings matched to the joint design.
Ring Gaskets
Circular profiles with specified inner and outer diameters for connections surrounding a bore, port, or fluid passage.
Multi-Hole Gaskets
Incorporate multiple bolt holes, ports, or cut-outs to align with equipment interfaces and mounting patterns.
Custom Contour Gaskets
Non-circular shapes can be produced for irregular housings, covers, access panels, and equipment interfaces where standard gasket outlines do not match.
FAQ
Can NBR rubber gaskets replace an existing gasket made from another material?
Yes, provided the replacement material is compatible with the operating fluid, temperature, pressure, and joint design. The original gasket dimensions alone are not sufficient to determine material suitability.
What can cause an NBR rubber gasket to leak after installation?
Common causes include uneven bolt tightening, damaged mating surfaces, incorrect gasket thickness, insufficient sealing compression, and material incompatibility with the contacting fluid. Checking the joint condition and assembly procedure can help identify the cause.
Are NBR rubber gaskets suitable for hydraulic equipment?
NBR gaskets are commonly considered for hydraulic equipment where mineral-based hydraulic oil is present. Suitability depends on the specific hydraulic fluid, operating temperature, pressure conditions, and gasket design.
How can gasket thickness affect joint sealing?
Thickness influences how the gasket fits between mating surfaces and how much it deforms during assembly. An unsuitable thickness may prevent proper contact or cause excessive compression, so the specified joint dimensions should guide selection.
