O-ring MVQ 220x5 VMQ Silicone

O-ring MVQ 220x5 VMQ Silicone

O-ring MVQ 220x5 VMQ Silicone is an elastomeric sealing ring with a nominal inside diameter of 220 mm and a cross-section of 5 mm. It is made from VMQ silicone rubber. The designation MVQ is also frequently encountered in commercial product descriptions and searches for silicone O-rings.

Technical data

What does O-ring size 220x5 mean?

The designation 220x5 mm defines two primary dimensions:

• 220 mm - nominal inside diameter ID
• 5 mm - cross-section CS

The 220 mm dimension does not refer to the outside diameter.

Based on nominal geometry, the approximate outside diameter is:

220 mm + 2 x 5 mm = 230 mm

For identification and ordering, the primary size remains 220x5 mm, meaning inside diameter x cross-section.

VMQ, MVQ and silicone - what do these terms mean?

VMQ is the standard designation for methyl vinyl silicone rubber, a silicone elastomer widely used for technical seals and O-rings.

The designation MVQ is also frequently encountered in commercial catalogues, product listings and search queries. For precise technical identification, VMQ silicone rubber is the preferred terminology.

Common search terms include:

• VMQ O-ring
• MVQ O-ring
• silicone O-ring
• silicone rubber O-ring

Properties of VMQ silicone O-rings

VMQ silicone rubber is valued in sealing technology for its flexibility and ability to retain useful elastomeric properties across a broad temperature range.

Silicone O-rings can be used in appropriately designed sealing systems where the properties of VMQ match the operating conditions.

However, the exact performance depends on the specific silicone compound. A universal temperature range, hardness or chemical-resistance rating should not be assigned to every VMQ O-ring without the compound manufacturer's technical data.

VMQ vs NBR vs FKM O-rings

O-rings made from VMQ, NBR and FKM may all be available in the same 220x5 mm size, but their material properties differ significantly.

VMQ silicone is commonly selected where temperature behaviour and silicone's flexibility are important.

NBR is widely used in many applications involving mineral oils and greases.

FKM is commonly selected for applications requiring resistance to many oils, fuels, hydrocarbons and elevated temperatures.

The correct elastomer should always be selected according to the actual medium and operating conditions. Identical 220x5 mm dimensions do not make these materials automatically interchangeable.

How to select an O-ring VMQ 220x5

Before ordering, verify:

• inside diameter: 220 mm
• cross-section: 5 mm
• material: VMQ silicone
• required hardness
• operating medium
• operating temperature
• pressure
• groove dimensions and geometry
• static or dynamic sealing conditions

Compatibility of the specific VMQ compound with the operating medium should always be verified.

Is every silicone O-ring suitable for food contact?

No.

The fact that an O-ring is made from VMQ silicone does not automatically mean that it is approved for food contact, drinking water, pharmaceutical or medical applications.

Such applications require appropriate compliance documentation or certification for the specific compound and finished product.

Installation

The groove and mating surfaces should be clean before installation. The O-ring should be positioned evenly without twisting, cutting or excessive stretching.

Sharp edges, threads and burrs should be avoided during installation because they can damage the silicone surface and compromise sealing performance.

Alternative designations and search references

This product may also be searched as:

• O-ring MVQ 220x5
• O-ring VMQ 220x5
• Silicone O-ring 220x5
• Silicone O-ring 220x5 mm
• VMQ O-ring 220x5 mm
• MVQ O-ring 220x5 mm
• O-ring silicone 220x5
• O-ring 220 x 5 VMQ

These are common alternative ways of identifying the same basic dimensional and material specification.

FAQ

What are the dimensions of the VMQ O-ring 220x5?

The nominal inside diameter is 220 mm and the cross-section is 5 mm.

What is the outside diameter of a 220x5 O-ring?

Based on nominal geometry, the approximate outside diameter is 230 mm.

What does VMQ mean?

VMQ is the standard designation for methyl vinyl silicone rubber, an elastomer used for technical sealing components including O-rings.

Are MVQ and VMQ the same material?

MVQ is frequently used commercially when referring to silicone O-rings, while VMQ is the preferred technical designation for this class of silicone rubber.

Can a VMQ 220x5 O-ring be replaced with an NBR 220x5 O-ring?

Not automatically. Although both products have the same nominal dimensions, VMQ and NBR have different material properties and compatibility characteristics.

Is a VMQ O-ring suitable for high temperatures?

VMQ silicone is known for retaining useful properties over a broad temperature range. However, the permissible operating temperature must be determined for the specific compound, medium and operating conditions.

Is a VMQ silicone O-ring food grade?

Not automatically. Food-contact suitability must be confirmed by appropriate documentation or certification for the specific material and product.

O-ring MVQ 220x5 VMQ - key information

O-ring 220x5 VMQ is a silicone rubber sealing ring with a nominal inside diameter of 220 mm and a 5 mm cross-section. VMQ is the technical designation for this type of silicone elastomer, while MVQ is also commonly encountered in commercial searches. Correct selection requires consideration of the medium, temperature, hardness, pressure and groove geometry.