O-Ring 8.3x2.4 mm VMQ/MVQ 70 Shore A - Silicone Rubber Seal

O-Ring 8.3x2.4 mm VMQ/MVQ 70 Shore A - Silicone Rubber Seal (Pack of 100)

O-Ring 8.3x2.4 mm VMQ/MVQ 70 Shore A is a circular elastomeric sealing ring manufactured from silicone rubber, designated VMQ or MVQ. It has an inside diameter of 8.3 mm, a cross-sectional diameter of 2.4 mm and a nominal hardness of 70 Shore A. Its nominal outside diameter is 13.1 mm. The product is supplied in a pack of 100 pieces and is primarily intended for static sealing applications involving compatible media. The manufacturer of this specific product has not been identified.

Technical Specifications - O-Ring 8.3x2.4 VMQ/MVQ 70 Shore A

The nominal outside diameter is calculated from the inside diameter and twice the cross-sectional diameter:

13.1 mm = 8.3 mm + 2 x 2.4 mm.

This is a nominal geometric dimension and does not include manufacturing tolerances.

Exact dimensional tolerances, operating temperature limits, chemical resistance, mechanical strength, compression set and permissible operating pressure depend on the specific silicone compound and must be verified against its technical documentation.

What Does O-Ring 8.3x2.4 VMQ/MVQ 70 Shore A Mean?

The designation identifies the seal dimensions, elastomer material, nominal hardness and packaging quantity.

• 8.3 - inside diameter in millimeters.

• 2.4 - cross-sectional diameter in millimeters.

• VMQ - standardized designation for silicone rubber.

• MVQ - alternative designation encountered in commercial silicone sealing terminology.

• 70 - nominal hardness value.

• Shore A - hardness measurement scale used for elastomeric materials.

• Pack of 100 - the sales package contains 100 individual O-rings.

The designation 8.3x2.4 mm specifies the inside diameter and cross-sectional diameter, not the inside and outside diameters.

VMQ vs MVQ - Material Designations

VMQ is the standardized designation for a class of silicone rubber elastomers used in technical sealing products.

MVQ is an alternative designation commonly encountered in industrial catalogs and commercial product descriptions.

Both terms are used to identify silicone O-rings, but they do not define the complete compound formulation.

Two silicone O-rings with identical dimensions and nominal hardness may differ in:

• Compound formulation.

• Tensile strength.

• Tear resistance.

• Compression set.

• Chemical compatibility.

• Temperature performance.

• Curing system.

• Regulatory approvals.

Matching dimensions, material designation and hardness do not automatically guarantee complete interchangeability.

Construction and Operating Principle

The 8.3x2.4 mm VMQ silicone O-ring is a one-piece elastomeric sealing element with a circular cross-section.

It contains no metal reinforcement, spring or additional sealing lip.

When installed in a correctly dimensioned groove, the O-ring is compressed between two mating surfaces.

The resulting elastic deformation generates contact pressure that helps prevent liquids or gases from passing through the sealing interface.

Effective sealing depends on:

• Correct groove geometry.

• Appropriate cross-sectional compression.

• Groove fill.

• Surface finish of mating components.

• Operating pressure.

• Temperature.

• Chemical compatibility.

• Compression set.

• Extrusion gap dimensions.

• Static or dynamic operating conditions.

Importance of the 2.4 mm Cross-Section

The cross-sectional diameter is a critical design parameter.

It influences the required groove depth, compression level, sealing contact pressure and available space for elastomer deformation.

An O-ring measuring 8.3x2.4 mm is not automatically interchangeable with another O-ring having the same inside diameter but a different cross-section.

Different cross-sectional dimensions require verification of the groove geometry and installation conditions.

Silicone Rubber VMQ 70 Shore A - Material Properties

Flexibility Across a Broad Temperature Range

VMQ silicone rubber is commonly used in sealing applications requiring flexibility at low temperatures and resistance to elevated temperatures.

Compared with many conventional rubber compounds, silicone elastomers can offer favorable temperature-related properties.

However, the exact permissible operating temperature range depends on:

• Silicone compound formulation.

• Duration of temperature exposure.

• Sealed medium.

• Mechanical loading.

• Compression level.

• Environmental conditions.

Specific minimum and maximum operating temperatures should not be assigned without verified material documentation.

Hardness of 70 Shore A

A nominal hardness of 70 Shore A describes the elastomer's resistance to indentation.

Hardness influences:

• Deformation during installation.

• Contact pressure.

• Required compression.

• Resistance to extrusion.

• Mechanical behavior under load.

A hardness value of 70 Shore A does not independently determine maximum permissible operating pressure.

Pressure capability depends on groove design, extrusion gap, temperature, compound properties and the complete sealing arrangement.

Chemical Compatibility

VMQ silicone rubber is not universally resistant to all chemicals.

Before installation, compatibility should be checked for:

• Mineral oils.

• Fuels.

• Solvents.

• Industrial chemicals.

• Process fluids.

• Gases.

Chemical resistance also depends on temperature, concentration and exposure duration.

The suitability of the specific silicone compound must be confirmed for the intended medium.

Mechanical Resistance

Silicone rubber may exhibit lower resistance to tearing and abrasion than elastomers specifically selected for intensive dynamic sealing.

Careful handling is therefore important during installation.

Avoid excessive stretching, twisting and dragging the O-ring across sharp edges.

VMQ vs NBR, FKM and EPDM O-Rings

These materials may be manufactured as O-rings with identical dimensions of 8.3x2.4 mm and nominal hardness of 70 Shore A.

However, they are not automatically interchangeable.

The correct elastomer must be selected according to the sealed medium, temperature, pressure and operating conditions.

Alternative Designations and Search References

The product may appear under the following commercial designations:

• O-Ring 8.3x2.4 VMQ 70 Shore A - 100 pcs

• O-Ring 8.3x2.4 MVQ 70 Shore A - 100 pcs

• Silicone O-Ring 8.3x2.4 mm

• VMQ O-Ring 8.3x2.4 mm

• MVQ Silicone O-Ring 8.3x2.4

• O-Ring 8.3x2.4 70 ShA Silicone

• Silicone Rubber O-Ring 8.3x2.4 mm

• Silicone Sealing Ring 8.3x2.4 mm

• O-Ring 8.3 mm ID x 2.4 mm CS

• Silicone O-Rings 8.3x2.4 mm - Pack of 100

These are alternative commercial descriptions of the same nominal dimensions and material category.

They are not verified OEM part numbers or manufacturer-specific cross-references.

Selecting the Correct 8.3x2.4 mm Silicone O-Ring

Before ordering, verify the following parameters:

• Inside diameter: 8.3 mm.

• Cross-sectional diameter: 2.4 mm.

• Nominal outside diameter: 13.1 mm.

• Material: VMQ / MVQ silicone rubber.

• Nominal hardness: 70 Shore A.

• Groove dimensions and tolerances.

• Required cross-sectional compression.

• Installation stretch.

• Groove fill.

• Operating pressure.

• Operating temperature.

• Chemical compatibility.

• Static or dynamic sealing conditions.

• Surface finish.

• Extrusion gap.

• Required service life.

How Should the Groove Be Designed?

The groove must provide sufficient compression to create an effective seal while allowing space for elastomer deformation.

The groove depth should not simply be assumed to equal the 2.4 mm cross-sectional diameter.

Insufficient compression may cause leakage, while excessive compression may damage the elastomer or accelerate permanent deformation.

Groove dimensions should be selected according to the sealing arrangement and applicable engineering design guidelines.

What Is the Outside Diameter of an 8.3x2.4 mm O-Ring?

The nominal outside diameter is 13.1 mm.

It is calculated by adding twice the 2.4 mm cross-sectional diameter to the 8.3 mm inside diameter.

This value refers to the uninstalled, undeformed O-ring and does not include manufacturing tolerances.

Pack of 100 - Industrial Supply and Maintenance Applications

The product is supplied in a package containing 100 silicone O-rings, each with nominal dimensions of 8.3x2.4 mm.

Bulk packaging is particularly useful for:

• Industrial maintenance departments.

• Mechanical workshops.

• Equipment repair services.

• Manufacturing facilities.

• Technical procurement departments.

• Companies assembling sealing kits.

• Businesses requiring repeated replacement of identical sealing components.

A pack of 100 provides a convenient sales quantity for maintenance inventories, production planning and technical purchasing.

Before using these O-rings in a production process, verify the required dimensional tolerances, material properties and compatibility with the equipment specification.

Why Choose a Pack of 100 O-Rings?

Purchasing O-rings in a pack of 100 can simplify inventory management when the same sealing dimensions are used repeatedly.

It allows maintenance teams to maintain a stock of identical nominal sealing components for scheduled servicing and routine replacement.

However, the quantity supplied does not establish suitability for a particular machine or operating environment.

Each application must still be evaluated against the relevant technical requirements.

Typical Applications of Silicone O-Rings

Small-diameter VMQ silicone O-rings can be used in compact sealing arrangements where the material and geometry are compatible with operating conditions.

Typical applications of this sealing design include:

• Static joints in industrial equipment.

• Small covers and housings.

• Compact technical assemblies.

• Connections requiring elastomeric sealing rings.

• Mechanical components with correctly designed O-ring grooves.

• Static sealing arrangements involving compatible liquids or gases.

These are general applications of silicone O-ring technology, not verified OEM applications for this specific product.

Food, Medical and Drinking Water Applications

Silicone rubber is used in certain food-contact, medical and drinking-water applications.

However, the VMQ material designation alone does not establish regulatory compliance.

Suitability for these applications requires appropriate documentation for the specific silicone compound and finished product.

A generic silicone O-ring should not be described as food-grade, medical-grade or drinking-water approved without verified certification.

Installation and Maintenance

Preparing the Sealing Surfaces

Before installation, clean the groove and mating surfaces.

Remove dirt, burrs and sharp edges that could damage the silicone elastomer.

Inspect the groove for scratches, corrosion and dimensional defects.

Installing the O-Ring

During installation:

• Position the O-ring evenly inside the groove.

• Avoid twisting the elastomer.

• Do not stretch the ring more than necessary.

• Avoid sharp installation tools.

• Use only assembly lubricants compatible with silicone and the sealed medium.

• Check that the O-ring is not trapped or pinched between mating components.

Inspection During Service

Inspect the sealing arrangement during scheduled maintenance.

Replace the O-ring if it shows cracking, tearing, permanent flattening, excessive swelling or loss of elasticity.

Storage

Store silicone O-rings in a clean, dry environment.

Protect the package against contamination, mechanical damage, excessive stretching and permanent compression.

Frequently Asked Questions - O-Ring 8.3x2.4 VMQ/MVQ 70 Shore A

1. What are the dimensions of the 8.3x2.4 mm silicone O-ring?

The O-ring has a nominal inside diameter of 8.3 mm, cross-sectional diameter of 2.4 mm and outside diameter of 13.1 mm.

2. How many O-rings are included in one package?

Each sales package contains 100 silicone O-rings with nominal dimensions of 8.3x2.4 mm.

3. What does VMQ or MVQ mean?

VMQ is the standardized designation for silicone rubber. MVQ is an alternative designation encountered in industrial sealing terminology.

4. What does 70 Shore A mean?

70 Shore A indicates the nominal hardness of the silicone elastomer. It describes resistance to indentation but does not independently determine maximum operating pressure.

5. Is the 8.3x2.4 mm silicone O-ring resistant to high temperatures?

VMQ silicone rubber is commonly used in applications requiring flexibility across a broad temperature range. Exact operating temperature limits depend on the specific compound.

6. Can an 8.3x2.4 mm VMQ O-ring replace an NBR O-ring?

Not automatically. VMQ and NBR differ in chemical, thermal and mechanical properties. Material compatibility must be verified before substitution.

7. Is this silicone O-ring suitable for food contact?

Not without appropriate documentation. Food-contact suitability requires verification of the specific silicone compound and finished product.

8. Does 8.3x2.4 mean the outside diameter is 8.3 mm?

No. The first dimension is the inside diameter, while the second is the cross-sectional diameter. The nominal outside diameter is 13.1 mm.

O-Ring 8.3x2.4 VMQ/MVQ 70 Shore A - Key Product Information

The 8.3x2.4 mm VMQ/MVQ 70 Shore A O-ring is a silicone rubber sealing ring with an 8.3 mm inside diameter, 2.4 mm cross-section and 13.1 mm nominal outside diameter. Its hardness is 70 Shore A. Supplied in a pack of 100 pieces, it is primarily intended for compatible static sealing applications requiring controlled compression and correct groove dimensions.

The 8.3x2.4 mm VMQ/MVQ 70 Shore A silicone O-ring, pack of 100, is offered by simmering.pl, an industrial sealing components and bearing supplier operated by TG Ersatzteile Polska Sp. z o.o. The company maintains a warehouse in Lublin, Poland, serving industrial customers, maintenance departments and technical procurement teams with shipping across Europe and worldwide.