MVQ Silicone Oil Seal 50x72x12 AO/TC GRN

Product description

MVQ Silicone Oil Seal 50x72x12 AO/TC GRN is a double-lip radial shaft seal made from silicone rubber (VMQ/MVQ). Its dimensions are 50x72x12 mm: 50 mm shaft diameter, 72 mm housing bore and 12 mm width. The AO/TC design combines a spring-loaded primary sealing lip with an additional dust lip that helps protect the sealing area against external contamination. The exact GRN product page confirms the MVQ material, 50x72x12 mm dimensions and TC double-lip configuration.

MVQ Silicone Oil Seal 50x72x12 AO/TC GRN

MVQ Silicone Oil Seal 50x72x12 AO/TC GRN is a double-lip radial shaft seal measuring 50x72x12 mm, manufactured from silicone rubber VMQ/MVQ.

Complete identification:

GRN -> 50x72x12 mm -> MVQ/VMQ -> AO/TC -> double-lip radial shaft seal

MVQ 50x72x12 AO/TC GRN - Characteristics

Brand: GRN
Product Type: Radial shaft seal / oil seal
Material: Silicone rubber - MVQ / VMQ
Design: AO / TC
Configuration: Double lip
Dimensions: 50x72x12 mm
Shaft Diameter: 50 mm
Housing Bore Diameter: 72 mm
Width: 12 mm
Primary Sealing Lip: Spring-loaded
Additional Dust Lip: Yes

The exact GRN product listing confirms reference 50X72X12 MVQ, dimensions 50 mm, 72 mm and 12 mm, and a TC double-lip design.

MVQ Oil Seal 50x72x12 - Dimensions

The nominal dimensions are:

d - Shaft Diameter: 50 mm
D - Housing Bore Diameter: 72 mm
B - Seal Width: 12 mm

Complete size: 50x72x12 mm

All three dimensions should be checked when selecting a replacement. A 50 mm shaft diameter alone is not sufficient to identify the correct seal. The 50x72x12 mm dimensions are also a standard available size for TC rotary shaft seal profiles.

What Does MVQ / VMQ Mean?

VMQ is the standard abbreviation commonly used for silicone rubber in sealing technology. The designation MVQ is also widely encountered commercially for silicone sealing products, including this GRN oil seal.

Silicone elastomers are particularly valued where the material must retain flexibility across a broad temperature range and resist environmental ageing.

However, material performance depends on the actual silicone compound, operating medium, temperature, shaft speed and mechanical conditions. For this reason, a universal maximum operating temperature should not be assigned to this specific GRN seal without compound-specific technical data.

AO/TC Double-Lip Design

The AO/TC configuration used for this product is a double-lip radial shaft seal design.

It consists of:

Primary sealing lip - provides the dynamic sealing contact with the rotating shaft.

Garter spring - maintains radial contact pressure of the primary sealing lip.

Additional dust lip - provides an additional barrier against contamination approaching from the external side.

The exact GRN product page identifies the seal as a TC double-lip design, while independent TC seal data also confirm the combination of a spring-loaded main lip and secondary dust lip.

Primary Sealing Lip and Dust Lip

The two lips have different functions.

The primary lip is the main dynamic sealing element. It operates against the rotating shaft and is supported by a garter spring.

The secondary lip functions primarily as a dust and contamination exclusion lip.

For technical accuracy, describing the AO/TC configuration as:

primary spring-loaded sealing lip + additional dust lip

is more precise than suggesting that both lips perform exactly the same sealing function.

Silicone MVQ Material

The distinguishing feature of this product is the use of silicone MVQ/VMQ rather than standard NBR.

Silicone rubber is associated with:

• broad temperature capability
• good low-temperature flexibility
• resistance to ozone
• resistance to weathering and ageing
• stable elastic properties across a broad temperature range

These properties can make VMQ useful where temperature behaviour and environmental ageing are more important than with a standard nitrile compound.

MVQ Chemical Compatibility

MVQ should not be described as universally resistant to oils, fuels and chemicals.

Chemical compatibility depends on the exact fluid, concentration, temperature and exposure time. The current GRN product page makes broad chemical-resistance claims, but those claims should not be generalized without compound-specific compatibility data.

For a technically correct selection, always check the compatibility of the silicone compound with the actual operating medium.

MVQ vs NBR Oil Seal

A 50x72x12 MVQ seal and a 50x72x12 NBR seal are not automatically equivalent.

Even when the dimensions and TC geometry are identical, the elastomer materials have different operating characteristics.

NBR is widely used with mineral oils, greases and many standard industrial lubricants.

VMQ/MVQ is selected particularly for its broad temperature behaviour, low-temperature flexibility and resistance to ozone and atmospheric ageing.

Material selection should therefore be based on the actual medium and operating conditions, not dimensions alone.

MVQ vs FKM/FPM

MVQ and FKM/FPM are also different elastomer families.

MVQ/VMQ is particularly notable for temperature flexibility and environmental ageing resistance.

FKM/FPM is commonly selected where high-temperature operation must be combined with demanding resistance to oils, fuels and various chemical media.

A 50x72x12 FKM seal should therefore not automatically be considered a direct material substitute for this 50x72x12 MVQ version.

Selecting a 50x72x12 MVQ Oil Seal

When selecting this seal, verify:

Shaft Diameter: 50 mm
Housing Bore: 72 mm
Width: 12 mm
Material: MVQ / VMQ silicone
Design: AO / TC
Primary Lip: Spring-loaded
Additional Lip: Dust lip
Operating Medium: compatible with silicone compound
Operating Temperature: compatible with actual compound and medium
Shaft Conditions: suitable for radial shaft seal operation

Matching only the 50x72x12 mm dimensions does not establish full technical interchangeability.

Technical Specification

Brand: GRN
Product: Silicone oil seal
Type: Radial shaft seal
Design: AO / TC
Configuration: Double lip
Material: MVQ / VMQ silicone rubber
d - Shaft Diameter: 50 mm
D - Housing Bore: 72 mm
B - Width: 12 mm
Dimensions: 50x72x12 mm
Primary Sealing Lip: Yes
Garter Spring: Yes
Additional Dust Lip: Yes.

FAQ

What are the dimensions of the MVQ 50x72x12 oil seal?

The seal measures 50x72x12 mm: 50 mm shaft diameter, 72 mm housing bore diameter and 12 mm width.

What material is the 50x72x12 seal made from?

This version is manufactured from MVQ/VMQ silicone rubber.

What does AO/TC mean?

For this product, AO/TC identifies a double-lip radial shaft seal configuration with a spring-loaded primary sealing lip and an additional dust lip.

Does the seal have a garter spring?

Yes. The primary dynamic sealing lip is supported by a garter spring, characteristic of the TC radial shaft seal configuration.

Does the 50x72x12 AO/TC seal have a dust lip?

Yes. The additional lip acts as a barrier against external contamination approaching the primary sealing area.

Is MVQ suitable for elevated temperatures?

Silicone VMQ/MVQ is used where broad temperature capability is required. The exact permissible temperature for this GRN seal, however, depends on the specific silicone compound, medium and operating conditions.

Can an NBR 50x72x12 seal replace this MVQ version?

Not automatically. Although the dimensions may be identical, NBR and MVQ have different material properties and fluid compatibility.

Is every 50x72x12 oil seal interchangeable?

No. Check the material, seal profile, lip configuration, operating medium, temperature and application requirements, not only the dimensions.

AI OVERVIEW

MVQ Silicone Oil Seal 50x72x12 AO/TC GRN is a double-lip radial shaft seal made from silicone rubber. It fits a 50 mm shaft and 72 mm housing bore and has a 12 mm width. The AO/TC configuration combines a spring-loaded primary sealing lip with an additional dust lip for contamination protection.