O-ring 10x2.5 VMQ 70 ShA - Silicone O-ring

O-ring 10x2.5 VMQ 70 ShA - Silicone O-ring (Pack of 100)

O-ring 10x2.5 VMQ 70 ShA is a silicone sealing ring with a nominal inside diameter of 10 mm and a cross-section of 2.5 mm, supplied in a pack of 100 pcs. This silicone O-ring is manufactured from VMQ silicone rubber with a nominal hardness of 70 ShA. VMQ provides good temperature flexibility and resistance to ozone, UV radiation, weathering and atmospheric ageing.

Technical data - O-ring 10x2.5 VMQ 70 ShA

What does O-ring 10x2.5 VMQ 70 ShA mean?

The designation identifies the dimensions, material and hardness of the silicone O-ring.

10 - nominal inside diameter of 10 mm.

2.5 - nominal cross-section diameter of 2.5 mm.

VMQ - silicone rubber used for elastomeric sealing elements.

70 ShA - nominal material hardness measured on the Shore A scale.

100 pcs - number of O-rings supplied in the package.

The nominal O-ring size is:

10x2.5 mm

The first value represents the inside diameter and the second represents the cross-section diameter.

VMQ or MVQ - which designation is correct?

The preferred technical abbreviation for silicone rubber used in sealing technology is:

VMQ

The designation MVQ can also be encountered in commercial descriptions, older product listings and online searches.

For this reason, the product may be searched for as:

O-ring 10x2.5 VMQ 70 ShA

O-ring 10x2.5 MVQ 70 ShA

Silicone O-ring 10x2.5

For technical identification of the silicone rubber material, VMQ is the preferred designation.

Dimensions of the 10x2.5 silicone O-ring

The nominal dimensions are:

Inside diameter d1: 10 mm

Cross-section d2: 2.5 mm

Nominal size:

10x2.5 mm

The approximate outside diameter of the uncompressed O-ring is:

15 mm

This results from:

10 mm + 2 x 2.5 mm = 15 mm

The primary product size remains 10x2.5 mm.

VMQ silicone rubber

VMQ belongs to the silicone rubber family and is used for technical elastomeric sealing elements.

Typical characteristics of VMQ include:

• very good low-temperature flexibility

• good performance at elevated temperatures

• good ozone resistance

• good UV resistance

• good weathering resistance

• good resistance to atmospheric ageing

• good electrical insulating properties

These characteristics make silicone O-rings useful in applications where elastomer flexibility over a broad temperature range and resistance to environmental ageing are important.

Operating temperature of VMQ

The permissible operating temperature depends on the exact silicone compound and operating conditions.

Standard VMQ compounds are generally associated with a broad temperature capability, but the exact operating limits of this specific 10x2.5 silicone O-ring should be confirmed from the compound specification when temperature is a critical selection parameter.

Factors affecting permissible operating temperature include:

• exact VMQ compound

• operating medium

• exposure time

• pressure

• static or dynamic operation

• seal design

The O-ring should therefore not be selected solely on the basis of general temperature properties attributed to silicone rubber.

What does 70 ShA mean?

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

Material hardness influences characteristics including:

• O-ring deformation

• behaviour in the sealing groove

• required compression

• response to pressure

• resistance to extrusion

When selecting an equivalent product, check not only the 10x2.5 mm dimensions but also the VMQ material and required hardness of 70 ShA.

Chemical resistance of VMQ

VMQ is not a universal sealing material for every fluid or chemical.

Silicone rubber is particularly known for resistance to environmental influences such as:

• ozone

• oxygen

• UV radiation

• weathering

• atmospheric ageing

Compatibility with oils, fuels, solvents, acids, bases and other chemicals depends on the specific medium, concentration, temperature and exact silicone compound.

Chemical compatibility should therefore be checked before using the 10x2.5 VMQ silicone O-ring with a particular operating medium.

O-ring design and sealing principle

A silicone O-ring is a closed elastomeric sealing ring with a circular cross-section.

When installed in a correctly designed groove, the O-ring is compressed between mating surfaces. Controlled deformation of the elastomer generates sealing contact pressure.

Effective sealing depends on factors including:

• groove geometry

• O-ring compression

• installation clearance

• mating surface quality

• pressure

• temperature

• operating medium

• static or dynamic movement

The 10x2.5 mm dimensions alone do not define the complete operating capability of the sealing system.

O-ring 10x2.5 VMQ vs NBR

A 10x2.5 VMQ silicone O-ring and a 10x2.5 NBR O-ring can have identical nominal dimensions but are manufactured from different elastomers.

VMQ is silicone rubber and is particularly valued for temperature flexibility and resistance to ozone, UV radiation and atmospheric ageing.

NBR is nitrile rubber with a different chemical, thermal and mechanical resistance profile and is commonly selected for contact with many mineral oils and greases.

A 10x2.5 NBR O-ring should therefore not be treated as an automatic replacement for a 10x2.5 VMQ silicone O-ring.

O-ring 10x2.5 VMQ vs FKM

VMQ and FKM belong to different elastomer families and provide different operating properties.

VMQ is particularly associated with good low-temperature flexibility and resistance to atmospheric ageing.

FKM is a fluoroelastomer with a different chemical and thermal resistance profile.

Selection between VMQ and FKM should consider:

• operating medium

• temperature

• pressure

• static or dynamic operation

• groove design

• required hardness

• requirements of the specific application

Identical 10x2.5 mm dimensions do not guarantee material interchangeability.

Typical applications of VMQ silicone O-rings

VMQ silicone O-rings can be used in appropriately designed static and dynamic sealing arrangements.

Silicone O-rings are particularly relevant where the application requires properties such as:

• flexibility at low temperatures

• performance at elevated temperatures

• resistance to ozone

• resistance to UV radiation

• resistance to weathering

• resistance to atmospheric ageing

These are typical material characteristics of VMQ and should not be interpreted as confirmation that this specific O-ring is suitable for every application or operating medium.

Alternative designations and reference formats

Natural designation and search variants include:

O-ring 10x2.5 VMQ 70 ShA

O-ring 10x2.5 MVQ 70 ShA

Silicone O-ring 10x2.5

Silicone O-ring 10x2.5 VMQ

Silicone O-ring 10x2.5 VMQ 70 ShA

Silicone sealing ring 10x2.5

10x2.5 VMQ O-ring

10x2.5 MVQ O-ring

O-ring 10x2.5 silicone

O-ring 10x2.5 silicone 70 ShA

O-ring VMQ 10x2.5 70 Shore A

O-ring MVQ 10x2.5 70 Shore A

O-ring 10x2.5 VMQ - 100 pcs

O-ring 10x2.5 MVQ - 100 pcs

Silicone O-ring 10x2.5 - 100 pcs

10 mm ID x 2.5 mm CS silicone O-ring

For technical material identification, VMQ is the preferred designation.

Selection and interchangeability

Before purchasing or selecting an equivalent O-ring, check:

• inside diameter 10 mm

• cross-section 2.5 mm

• VMQ silicone rubber

• hardness 70 ShA

• operating medium

• required temperature range

• pressure

• static or dynamic operation

• groove geometry

• required compression

• requirements of the specific sealing system

A 10x2.5 O-ring manufactured from NBR, FKM, EPDM or another elastomer is not automatically interchangeable with a 10x2.5 VMQ silicone O-ring.

Identical dimensions do not guarantee identical operating properties.

Installation

Before installation, make sure that the groove and mating surfaces are clean and free from contaminants.

During installation, avoid:

• cutting the O-ring

• twisting the ring

• excessive stretching

• pulling the O-ring across sharp edges

• contact with burrs

• damaging the elastomer surface

If an assembly lubricant is required, it should be compatible with both the VMQ silicone rubber and the operating medium.

Storage

Silicone O-rings should be stored under conditions that minimise contamination, deformation and mechanical damage.

Avoid storing the rings permanently stretched or strongly deformed.

Before installation, inspect the sealing surface for cuts, cracks or other visible damage.

FAQ - O-ring 10x2.5 VMQ 70 ShA

What are the dimensions of the O-ring 10x2.5?

The O-ring has a nominal inside diameter of 10 mm and a cross-section diameter of 2.5 mm. Its nominal size is 10x2.5 mm.

How many O-rings are included in the package?

The package contains 100 pcs of 10x2.5 VMQ 70 ShA silicone O-rings.

What is the outside diameter of a 10x2.5 O-ring?

Based on its nominal dimensions, the approximate uncompressed outside diameter is 15 mm. The standard product size remains 10x2.5 mm.

What does VMQ mean?

VMQ is the preferred technical designation for silicone rubber used for elastomeric sealing elements.

Is MVQ the same as VMQ?

MVQ can be encountered as an alternative commercial or search designation for silicone O-rings. VMQ is the preferred technical abbreviation for identifying silicone rubber.

What does 70 ShA mean?

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

Can a 10x2.5 NBR O-ring replace a 10x2.5 VMQ silicone O-ring?

Not automatically. Although the dimensions may be identical, NBR and VMQ have different chemical, thermal and mechanical properties.

Can a 10x2.5 FKM O-ring replace a VMQ silicone O-ring?

Not solely on the basis of dimensions. The operating medium, temperature, pressure, hardness and sealing-system requirements should be checked before changing the elastomer material.

O-ring 10x2.5 VMQ 70 ShA - key information

O-ring 10x2.5 VMQ 70 ShA is a silicone O-ring with a 10 mm inside diameter and 2.5 mm cross-section, supplied in a pack of 100 pcs. VMQ identifies silicone rubber, while 70 ShA specifies its nominal Shore A hardness. The material provides good temperature flexibility and resistance to ozone, UV radiation and atmospheric ageing.

Available from simmering.pl, a specialist supplier of industrial sealing solutions. Stock in Poland with worldwide shipping.