Sealing Gasket / O-Ring Groove: Corner Radii 0.1-0.2 mm minimum

Component Specifications

Definition

A precisely engineered recess or channel machined into the mating surfaces of weir plates and nozzle bodies in industrial equipment. This groove provides a controlled compression zone for elastomeric O-rings or flat gaskets, creating a reliable static seal that prevents fluid leakage between connected components under varying pressure and temperature conditions.

Working Principle

The groove creates a confined space where the O-ring or gasket is compressed between two mating surfaces. When properly dimensioned, this compression causes the elastomeric material to deform and fill microscopic imperfections in the metal surfaces, creating a barrier against fluid passage. The groove geometry controls compression percentage, prevents extrusion under pressure, and maintains seal integrity throughout thermal expansion cycles.

Materials

Typically machined from the same base material as the parent component: stainless steel (304, 316), carbon steel, aluminum alloys, or engineered plastics. Groove surfaces often receive finishing treatments like polishing, plating, or coating to enhance seal compatibility and corrosion resistance.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Corner Radii	0.1-0.2 mm minimum
Groove Depth	0.7-0.9 times O-ring cross-section diameter
Groove Width	1.2-1.5 times O-ring cross-section diameter
Surface Finish	Ra 0.8-3.2 μm (32-125 μin)
Groove Bottom Finish	Smooth, free of tool marks
Dimensional Tolerance	±0.05 mm for critical applications

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 3601-1, ISO 3601-3, AS 568A, DIN 3771, SAE AS 4716

Parent Products

This component is used in the following industrial products

Weir Plate / Nozzle Body

The structural component that forms the flow control surface in an overflow weir or nozzle assembly.

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Engineering Analysis

Risks & Mitigation

Insufficient compression leading to leakage
Excessive compression causing seal damage
Groove contamination preventing proper seating
Thermal expansion mismatch
Chemical incompatibility between seal and groove material

FMEA Triads

Trigger: Incorrect groove dimensions
Failure: Seal leakage or premature failure
Mitigation: Implement dimensional verification with go/no-go gauges, maintain machining tool calibration, follow standardized groove design charts

Trigger: Surface defects or contamination
Failure: Fluid leakage through micro-channels
Mitigation: Implement cleaning protocols before assembly, use protective caps during storage, specify surface finish requirements in drawings

Trigger: Material incompatibility
Failure: Corrosion or chemical attack compromising seal integrity
Mitigation: Material compatibility testing, protective coatings, material certification for corrosive environments

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

ISO 286-1 tolerance grades IT7-IT9 for critical dimensions, geometric tolerances per ISO 1101

Test Method

Helium leak testing per ASTM E493, pressure decay testing, visual inspection per ASME B46.1, coordinate measuring machine (CMM) verification

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Sealing Gasket / O-Ring Groove

Manufacturer profiles associated with Sealing Gasket / O-Ring Groove.

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Precision component supporting rotating shafts in vibration motors to reduce friction and maintain alignment.

Seal Groove

Precision-machined groove in aluminum bearing housings designed to accommodate sealing elements for fluid containment and contamination prevention.

Frequently Asked Questions

What is the optimal compression percentage for O-rings in these grooves?

Typically 15-30% compression for static seals, depending on material and application. Higher compression provides better sealing but increases friction and potential for extrusion.

How do I prevent O-ring extrusion in high-pressure applications?

Use backup rings, reduce clearance gaps, select harder elastomers, or design with stepped or dovetail groove geometries that mechanically restrain the seal.

What surface finish is required for reliable sealing?

32-125 μin Ra (0.8-3.2 μm) is typical. Too smooth can cause adhesion; too rough allows leakage paths. Directional polishing should follow fluid flow direction.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Sealing Gasket / O-Ring Groove