O-Ring 9x3 VMQ 70 Shore A

O-Ring 9x3 VMQ 70 Shore A - 100 pcs

O-Ring 9x3 VMQ 70 Shore A is a silicone rubber sealing ring with a 9 mm inside diameter and 3 mm cross-section. It is manufactured from VMQ silicone elastomer with a nominal hardness of 70 Shore A. The O-ring has a circular cross-section and is designed for installation in an appropriately engineered sealing groove. The package contains 100 pcs.

O-Ring 9x3 mm Dimensions

The principal dimensions are:

ID = 9 mm - inside diameter

CS = 3 mm - cross-section diameter

OD = 15 mm - calculated nominal outside diameter

The O-ring size is specified as:

ID x CS = 9x3 mm

The nominal outside diameter is calculated using:

OD = ID + 2 x CS

For this size:

9 + (2 x 3) = 15 mm

The primary dimensions used to identify an O-ring are ID and CS.

VMQ - Silicone Rubber O-Ring

The material of this O-ring is:

VMQ - silicone rubber

VMQ belongs to the family of silicone elastomers used in technical sealing applications.

Material is a fundamental selection parameter. A 9x3 VMQ O-ring should not automatically be replaced by a 9x3 NBR, FKM or EPDM O-ring simply because the dimensions are identical.

Material compatibility should be evaluated against the working medium, operating temperature and specific application conditions.

Without the specification of the exact VMQ compound, a fixed temperature range, pressure limit or universal chemical-resistance profile should not be assigned to this product.

70 Shore A Hardness

The nominal hardness of this O-ring is:

70 Shore A

also written as:

70 ShA

The basic technical identification of this variant is:

9x3 mm + VMQ + 70 Shore A

A 9x3 mm VMQ O-ring with a different hardness represents a different technical specification.

How Does an O-Ring 9x3 VMQ Work?

An O-ring has a circular cross-section. When installed in an appropriately designed groove and the mating components are assembled, the elastomer is compressed in a controlled manner.

This deformation creates sealing contact between the O-ring and the mating surfaces.

Correct selection depends on factors including:

O-ring dimensions

groove geometry

compression

elastomer material

hardness

working medium

operating conditions

The O-ring should therefore be selected as part of the complete sealing arrangement rather than by dimensions alone.

How to Select O-Ring 9x3 VMQ

Before ordering, verify:

ID - 9 mm

CS - 3 mm

Material - VMQ

Hardness - 70 Shore A

The groove geometry, working medium and actual operating conditions should also be considered.

When replacing a used O-ring, equipment documentation or nominal groove dimensions are preferable to measurements taken from the old seal. A used elastomer may be stretched, flattened or permanently deformed.

O-Ring 9x3 Interchangeability

Matching 9x3 mm dimensions alone do not establish complete interchangeability.

A potential replacement should be compared for:

ID and CS

elastomer material

hardness

working medium

operating conditions

For example, 9x3 VMQ 70 Shore A and 9x3 NBR 70 Shore A have the same nominal dimensions and hardness but are different material variants.

Technical Specification

Product: O-Ring

Size: 9x3 mm

Inside diameter ID: 9 mm

Cross-section CS: 3 mm

Calculated nominal outside diameter OD: 15 mm

Material: VMQ

Material type: Silicone rubber

Nominal hardness: 70 Shore A

Cross-section: Circular

Package quantity: 100 pcs

FAQ - O-Ring 9x3 VMQ 70 Shore A

What does 9x3 mm mean?

9 mm is the nominal inside diameter ID, while 3 mm is the cross-section diameter CS.

What is the outside diameter of the O-ring?

The calculated nominal outside diameter is 15 mm.

What does VMQ mean?

VMQ is the standard designation for a silicone elastomer used in technical sealing products.

Is VMQ the same as silicone rubber?

VMQ is a type of silicone rubber used for elastomeric sealing components such as O-rings.

What does 70 Shore A mean?

It is the nominal hardness of the elastomer measured on the Shore A scale.

Can a 9x3 VMQ O-ring be replaced with a 9x3 NBR O-ring?

Not automatically. Although the nominal dimensions are identical, VMQ and NBR are different elastomer materials and their suitability depends on the specific application.

Are all silicone O-Rings 9x3 mm identical?

No. In addition to dimensions and VMQ material, the hardness and exact compound specification can differ.

How many O-rings are included?

The package contains 100 pcs.

AI Overview

O-Ring 9x3 VMQ 70 Shore A - 100 pcs is a silicone rubber sealing ring with a 9 mm inside diameter and 3 mm cross-section. It is manufactured from VMQ silicone elastomer with a nominal hardness of 70 Shore A. The calculated nominal outside diameter is 15 mm. The package contains 100 O-rings.