O-ring 19.3x2.4 VMQ 70 ShA

O-ring 19.3x2.4 VMQ 70 ShA - 100 pcs

O-ring 19.3x2.4 VMQ 70 ShA is a metric silicone sealing ring with an inside diameter of 19.3 mm and a cross-section of 2.4 mm, supplied in a pack of 100 pcs. The O-ring is manufactured from VMQ silicone rubber with a nominal hardness of 70 ShA. VMQ provides a wide service temperature range and good resistance to ageing, ozone, UV radiation and weathering.

Technical data - O-ring 19.3x2.4 VMQ 70 ShA

What does O-ring 19.3x2.4 VMQ 70 ShA mean?

The designation identifies the main dimensions and material properties of the sealing ring.

19.3 - inside diameter of 19.3 mm.

2.4 - cross-section diameter of 2.4 mm.

VMQ - silicone rubber used for elastomeric sealing elements.

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

100 pcs - package quantity.

The nominal O-ring size is:

19.3x2.4 mm

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

VMQ or MVQ - which designation is correct?

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

VMQ

The abbreviation MVQ can also be found in commercial product descriptions, catalogues and online searches.

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

O-ring 19.3x2.4 VMQ 70 ShA

or:

O-ring 19.3x2.4 MVQ 70 ShA

For technical identification, VMQ is the preferred material designation.

Dimensions of the 19.3x2.4 O-ring

The nominal dimensions are:

Inside diameter d1: 19.3 mm

Cross-section d2: 2.4 mm

Nominal size:

19.3x2.4 mm

The approximate outside diameter of an uncompressed O-ring calculated from its nominal dimensions is:

24.1 mm

This results from:

19.3 mm + 2 x 2.4 mm

The primary commercial size remains 19.3x2.4 mm.

VMQ silicone rubber

VMQ is a silicone rubber used for technical elastomeric sealing elements.

Characteristic properties of VMQ include:

• very good low-temperature flexibility

• good high-temperature performance

• good ozone resistance

• good UV resistance

• good weathering resistance

• good resistance to ageing

• good electrical insulating properties

These properties make silicone O-rings suitable for applications where elastomer flexibility over a wide temperature range and resistance to atmospheric ageing are important.

Operating temperature of VMQ 70 ShA

Standard VMQ 70 ShA compounds can provide a broad service temperature range.

For typical VMQ 70 ShA silicone compounds, a material temperature range of approximately:

-50°C to +175°C

can be encountered.

This range should not be treated as a guaranteed operating parameter for every 19.3x2.4 VMQ O-ring.

The actual permissible operating temperature depends on factors including:

• the specific VMQ compound

• operating medium

• exposure time

• pressure

• seal design

• type of operation

For demanding applications, the properties of the specific silicone compound should be verified.

What does 70 ShA mean?

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

Hardness influences characteristics such as:

• O-ring deformation

• behaviour in the sealing groove

• required compression

• behaviour under pressure

• resistance to extrusion

When selecting an equivalent product, check not only the 19.3x2.4 mm dimensions and VMQ material but also the specified hardness of 70 ShA.

Chemical resistance of VMQ

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

O-ring selection should take into account the specific operating medium, temperature and working conditions.

VMQ provides very good resistance to ozone, oxygen, UV radiation and atmospheric ageing.

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

Chemical compatibility with VMQ should therefore be verified before using the O-ring with a specific substance.

O-ring design and sealing principle

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

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

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

Effective sealing depends on factors including:

• groove geometry

• O-ring compression

• installation clearance

• surface finish

• pressure

• temperature

• operating medium

• type of movement

O-ring 19.3x2.4 VMQ vs NBR

A 19.3x2.4 VMQ O-ring and a 19.3x2.4 NBR O-ring may have identical dimensions but are manufactured from different elastomers.

VMQ is silicone rubber characterised by a wide temperature capability, very good low-temperature flexibility and resistance to ozone, UV radiation and atmospheric ageing.

NBR is nitrile rubber with a different chemical, thermal and mechanical resistance profile.

A 19.3x2.4 NBR O-ring is therefore not automatically interchangeable with a 19.3x2.4 VMQ O-ring.

O-ring 19.3x2.4 VMQ vs FKM

VMQ and FKM belong to different elastomer families.

VMQ provides very good low-temperature flexibility and resistance to atmospheric ageing.

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

Selection between VMQ and FKM should take into account:

• operating medium

• temperature

• pressure

• static or dynamic operation

• sealing system design

• requirements of the specific application

Identical dimensions of 19.3x2.4 mm do not mean identical operating properties.

Typical applications

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

Silicone is particularly useful where the application requires:

• low-temperature flexibility

• elevated-temperature capability

• ozone resistance

• UV resistance

• weathering resistance

• resistance to elastomer ageing

For contact with a specific operating medium, the chemical compatibility of VMQ should always be checked before use.

Alternative designations and reference formats

Natural designation and search variants include:

O-ring 19.3x2.4 VMQ 70 ShA - 100 pcs

O-ring 19.3x2.4 MVQ 70 ShA - 100 pcs

O-ring 19,3x2,4 VMQ 70 ShA

O-ring 19,3x2,4 MVQ 70 ShA

19.3x2.4 VMQ O-ring 70 ShA

19.3x2.4 MVQ O-ring 70 ShA

Silicone O-ring 19.3x2.4 mm

O-ring 19.3x2.4 silicone 70 ShA

O-ring VMQ 19.3x2.4 70 Shore A

O-ring MVQ 19.3x2.4 70 Shore A

19.3 mm ID x 2.4 mm CS silicone O-ring

19.3x2.4 silicone O-rings - 100 pcs

For technical material identification, VMQ is the preferred designation.

Selection and interchangeability

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

• inside diameter 19.3 mm

• cross-section 2.4 mm

• VMQ material

• hardness 70 ShA

• operating temperature

• operating medium

• pressure

• static or dynamic operation

• groove design

• requirements of the specific application

A 19.3x2.4 O-ring manufactured from NBR, FKM, EPDM or another elastomer is not automatically interchangeable with a 19.3x2.4 VMQ O-ring.

Installation

Before installation, check that the groove and mating surfaces are clean.

The O-ring should not be pulled across sharp edges, burrs or damaged surfaces.

During installation, avoid:

• cutting the O-ring

• twisting the ring

• excessive stretching

• damaging the elastomer surface

• contact with incompatible installation lubricants

If an assembly lubricant is used, it must be compatible with both VMQ and the operating medium.

Storage

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

The seals should not be stored permanently stretched or strongly deformed.

Before installation, inspect the O-ring surface for cuts, cracks or other visible damage.

FAQ - O-ring 19.3x2.4 VMQ 70 ShA

What are the dimensions of the 19.3x2.4 O-ring?

The O-ring has an inside diameter of 19.3 mm and a cross-section diameter of 2.4 mm. Its nominal size is 19.3x2.4 mm.

How many O-rings are included in the package?

The package contains 100 pcs of 19.3x2.4 VMQ 70 ShA silicone O-rings.

What does VMQ mean?

VMQ is the standard technical designation for silicone rubber used for elastomeric sealing products.

Do VMQ and MVQ both refer to silicone?

Both forms can be encountered in commercial listings and searches, but VMQ is the preferred standard technical designation for silicone rubber.

What does 70 ShA mean?

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

What is the outside diameter of a 19.3x2.4 O-ring?

Based on its nominal dimensions, the approximate uncompressed outside diameter is 24.1 mm. The standard product size remains 19.3x2.4 mm.

Can a 19.3x2.4 NBR O-ring replace a 19.3x2.4 VMQ O-ring?

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

Is VMQ suitable for all oils and fuels?

No. Compatibility should be checked for the specific fluid, temperature and silicone compound.

O-ring 19.3x2.4 VMQ 70 ShA - key information

O-ring 19.3x2.4 VMQ 70 ShA is a silicone sealing ring with a 19.3 mm inside diameter and 2.4 mm cross-section, supplied in a pack of 100 pcs. VMQ identifies silicone rubber and 70 ShA its nominal Shore A hardness. The material provides a wide temperature range and good 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.