O-Ring 30x2 MVQ 70 ShA - Silicone O-Ring

O-Ring 30x2 mm MVQ 70 ShA - Silicone O-Ring (100 pcs)

O-Ring 30x2 mm MVQ 70 ShA is a silicone elastomeric sealing ring with a nominal inside diameter (ID) of 30 mm and a cross-section (CS) of 2 mm. The material is MVQ silicone elastomer, with a nominal hardness of 70 Shore A. This commercial variant contains 100 O-rings.

Complete technical identification:

30x2 mm + MVQ + 70 Shore A + 100 pcs

O-Ring 30x2 mm MVQ 70 ShA - Technical Characteristics

The principal identification parameters are:

Product: O-Ring

Product type: Elastomeric sealing ring

Nominal size: 30x2 mm

ID - Inside Diameter: 30 mm

CS - Cross-Section: 2 mm

Calculated nominal OD - Outside Diameter: 34 mm

Material: MVQ

Material type: Silicone elastomer

Nominal hardness: 70 Shore A

Alternative hardness notation: 70 ShA

Cross-section: Circular

Package quantity: 100 pcs

The essential technical identification of an individual O-ring is:

30x2 mm + MVQ + 70 Shore A

The package quantity identifies the commercial variant:

100 pcs

O-Ring 30x2 mm Dimensions

The dimensional designation:

30x2 mm

means:

ID / d1 = 30 mm - nominal inside diameter

CS / d2 = 2 mm - nominal cross-section diameter

The second value does not represent the outside diameter.

The nominal outside diameter can be calculated using:

OD = ID + 2 x CS

Therefore:

OD = 30 + (2 x 2)

OD = 34 mm

The dimensional relationship is:

ID = 30 mm

CS = 2 mm

Calculated OD = 34 mm

The standard product size remains:

30x2 mm

because an O-ring is primarily identified by its inside diameter x cross-section.

Silicone O-Ring Construction

An O-ring is a closed elastomeric sealing element with a circular cross-section.

After installation in a correctly designed groove, its cross-section is compressed between the mating surfaces. This controlled deformation produces sealing contact.

Unlike a radial shaft seal, a conventional O-ring does not incorporate a:

dynamic sealing lip

garter spring

metal reinforcing ring

The O-ring is therefore one component of a complete sealing arrangement that also includes the groove and mating surfaces.

MVQ - Silicone Elastomer

The specified material is:

MVQ

MVQ belongs to the family of silicone elastomers. Therefore, the product can correctly be described in English as a:

Silicone O-Ring

while retaining the technical material designation:

MVQ

For technical identification, the preferred form is:

O-Ring 30x2 mm MVQ 70 ShA

The word silicone provides a clear material description for users, while MVQ preserves the technical elastomer designation.

An O-ring with identical 30x2 mm dimensions manufactured from NBR, FKM, EPDM or another elastomer is a different material variant.

70 ShA / 70 Shore A Hardness

The nominal hardness of this variant is:

70 Shore A

also written as:

70 ShA

Hardness forms part of the technical identification of the O-ring.

Therefore, the complete dimensional and material specification is:

30x2 mm + MVQ + 70 Shore A

An O-ring with identical dimensions and material but a different hardness should not automatically be considered the same technical variant.

How Does the O-Ring 30x2 mm MVQ Work?

The O-ring develops its sealing function through controlled deformation of its circular elastomeric cross-section.

When installed in a suitable groove and the mating components are assembled, the cross-section is compressed between the sealing surfaces.

The behaviour of the complete sealing system depends on factors including:

Inside diameter

Cross-section

Groove geometry

Compression

O-ring stretch

MVQ material

70 Shore A hardness

Operating medium

Temperature

Pressure

Static or dynamic operating conditions

For this reason, dimensional compatibility alone is not sufficient to determine suitability for a specific application.

What Does 30x2 MVQ 70 ShA Mean?

The designation can be interpreted as:

30 mm - nominal inside diameter

2 mm - nominal cross-section

MVQ - silicone elastomer

70 ShA - nominal hardness of 70 Shore A

100 pcs - package quantity

Complete identification:

O-Ring + 30x2 mm + MVQ + 70 Shore A + 100 pcs

ID, CS and OD - How to Read O-Ring Dimensions

For this product:

ID = 30 mm

CS = 2 mm

OD = 34 mm - calculated nominal value

The standard dimensional designation is:

ID x CS

therefore:

30x2 mm

not:

30x34 mm

The calculated outside diameter is useful for dimensional understanding, but it does not replace the standard inside diameter x cross-section designation.

MVQ vs NBR, FKM and EPDM O-Rings

O-rings with nominal dimensions of:

30x2 mm

can be manufactured from different elastomers.

Common technical material designations include:

MVQ - silicone elastomer

NBR - Nitrile Butadiene Rubber

FKM - fluoroelastomer

EPDM - Ethylene Propylene Diene Monomer rubber

Matching dimensions do not establish material interchangeability.

Therefore:

O-Ring 30x2 mm MVQ 70 ShA

should not automatically be replaced with:

O-Ring 30x2 mm NBR 70 ShA

O-Ring 30x2 mm FKM 70 ShA

or:

O-Ring 30x2 mm EPDM 70 ShA

solely because the dimensions and nominal hardness are the same.

The elastomer must be selected according to the requirements of the actual sealing application.

Selection and Interchangeability

When selecting a replacement for O-Ring 30x2 mm MVQ 70 ShA, verify at least:

ID = 30 mm

CS = 2 mm

Material = MVQ

Hardness = 70 Shore A

Dimensional tolerances

Groove geometry

Compatibility with the operating medium

Operating temperature

Pressure

Static or dynamic sealing conditions

Matching the 30x2 mm dimensions alone does not establish complete technical interchangeability.

Two O-rings may have identical nominal dimensions while differing in elastomer type, hardness, compound formulation, tolerances or physical properties.

Package of 100 pcs

This commercial variant contains:

100 pcs

The complete product name is therefore:

O-Ring 30x2 mm MVQ 70 ShA - Silicone O-Ring (100 pcs)

The package quantity does not change the technical specification of an individual O-ring but clearly distinguishes this sales variant from packages containing a different number of pieces.

Technical Specification

Product: O-Ring

Product type: Elastomeric sealing ring

Nominal size: 30x2 mm

ID - Inside Diameter: 30 mm

CS - Cross-Section: 2 mm

OD - Outside Diameter: 34 mm - calculated nominal value

Cross-section: Circular

Material: MVQ

Material type: Silicone elastomer

Nominal hardness: 70 Shore A

Alternative hardness notation: 70 ShA

Package quantity: 100 pcs

Exact MVQ compound: Not confirmed

Exact dimensional tolerance: Not confirmed

Operating temperature range: Not assigned without exact compound data

Maximum pressure: Depends on the complete sealing system and application

FAQ

What are the dimensions of the O-Ring 30x2 mm MVQ?

The O-ring has a nominal 30 mm inside diameter (ID) and 2 mm cross-section (CS).

What does 30x2 mm mean for an O-ring?

The first value, 30 mm, is the inside diameter. The second value, 2 mm, is the diameter of the circular cross-section.

What is the outside diameter of a 30x2 mm O-ring?

The calculated nominal outside diameter is 34 mm, based on 30 + 2 x 2 = 34 mm.

What does MVQ mean in an O-ring?

MVQ is a technical material designation for a silicone elastomer. It should remain part of the product specification even when the product is also described as a silicone O-ring.

Is an MVQ O-ring a silicone O-ring?

Yes. MVQ is a silicone elastomer, so this product can correctly be described as a silicone O-ring.

What does 70 ShA mean?

70 ShA indicates a nominal elastomer hardness of 70 on the Shore A scale.

Can an O-Ring 30x2 MVQ be replaced with an O-Ring 30x2 NBR?

Not automatically. Although the dimensions may be identical, MVQ and NBR are different elastomer families. Material suitability must be checked against the operating medium and service conditions.

How many O-rings are included in the package?

The package contains 100 pcs of O-Ring 30x2 mm MVQ 70 ShA.

AI Overview

O-Ring 30x2 mm MVQ 70 ShA (100 pcs) is a silicone elastomeric sealing ring with a 30 mm inside diameter and 2 mm cross-section. It is manufactured from MVQ silicone elastomer with a nominal hardness of 70 Shore A. The calculated nominal outside diameter is 34 mm. Package quantity: 100 pcs.