VMQ Silicone Oil Seals GRN - High Temperature Radial Shaft Seals
GRN VMQ silicone oil seals are radial shaft seals designed primarily for applications where resistance to high and low temperatures, elastomer flexibility, ozone, UV radiation and atmospheric ageing are important. The seal is installed stationary in the housing while its flexible sealing lip runs on the rotating shaft. The GRN range includes VMQ radial shaft seals in various dimensions for industrial machinery, drives, technical equipment and other rotating shaft applications.
What Is a VMQ Silicone Oil Seal?
A VMQ oil seal is a radial shaft seal manufactured from silicone rubber.
During operation:
the outer part of the seal remains stationary in the housing
the primary sealing lip runs on the rotating shaft
a garter spring helps maintain contact between the lip and shaft surface
Depending on the design, the oil seal may also include an additional protective dust lip.
The operating principle is therefore similar to NBR or FKM radial shaft seals, but the VMQ elastomer provides a different thermal, mechanical and chemical performance profile.
What Does VMQ Mean?
VMQ is the standard designation for silicone rubber used in technical sealing applications.
Its important characteristics include:
- excellent high-temperature performance
- excellent low-temperature flexibility
- very good ozone resistance
- very good UV resistance
- very good weathering resistance
- useful electrical insulation properties
VMQ is therefore particularly relevant where temperature range and environmental ageing resistance are more important than the oil resistance normally associated with NBR.
High Temperature VMQ Oil Seals
One of the main reasons for selecting a silicone radial shaft seal is temperature capability.
VMQ can retain useful elasticity at temperatures where standard NBR compounds may no longer be appropriate.
The actual permissible temperature depends on the specific silicone compound, seal construction, medium and shaft speed.
For this reason, a single maximum temperature should not automatically be assigned to every VMQ oil seal.
High-temperature capability should always be checked for the individual product and application.
VMQ Oil Seals for Low Temperatures
Silicone is also valued for its excellent flexibility at low temperatures.
This can be important in equipment operating:
- outdoors
- in cold environments
- under repeated heating and cooling cycles
- in low-temperature machinery
- in systems requiring flexibility during cold starts
This broad low-temperature capability is one of the characteristics that distinguishes VMQ from many conventional sealing elastomers.
Resistance to Ozone, UV and Ageing
VMQ silicone provides very good resistance to:
- ozone
- UV radiation
- atmospheric oxygen
- environmental ageing
- weather exposure
- temperature cycling
This makes silicone radial shaft seals particularly interesting for equipment exposed to changing environmental conditions over long operating periods.
Are VMQ Oil Seals Resistant to Oil?
This requires careful distinction.
Standard VMQ should not be treated as a universally oil-resistant elastomer.
Compatibility depends on:
- the specific silicone compound
- type of oil
- additives
- operating temperature
- exposure duration
Some oils can cause swelling or deterioration of standard VMQ compounds.
Where resistance to mineral oils, fuels or hydrocarbons is the primary requirement, FKM/FPM may often be a more appropriate choice, depending on the exact operating conditions.
VMQ vs FKM Oil Seals
VMQ and FKM are not direct substitutes.
VMQ is particularly valued for:
- excellent low-temperature flexibility
- broad temperature capability
- ozone resistance
- UV resistance
- atmospheric ageing resistance
FKM/FPM is commonly selected for:
- mineral oils
- fuels
- hydrocarbons
- elevated temperatures
- broader resistance to many aggressive technical media
The first selection criterion should therefore be the operating medium, followed by temperature, shaft speed and seal design.
VMQ vs NBR Oil Seals
The difference between NBR and VMQ is also important.
NBR
is widely used for standard applications involving many mineral oils, lubricating greases and compatible hydraulic fluids.
VMQ
is particularly relevant where broad temperature capability, low-temperature flexibility and resistance to ozone or UV are more important.
Matching dimensions alone does not mean that an NBR oil seal can safely be replaced with a VMQ seal.
Single-Lip VMQ Oil Seals
A single-lip VMQ oil seal has one primary sealing lip, usually supported by a garter spring.
Its function is to create radial sealing contact with the rotating shaft.
Single-lip designs are used where an additional external contamination lip is not required.
Potential applications include:
- industrial machinery
- drives
- gear units
- motors
- bearing assemblies
- rotating shafts
- technical equipment
Double-Lip VMQ Oil Seals
A double-lip design combines the primary sealing lip with an additional protective lip.
The auxiliary lip can help reduce the ingress of:
- dust
- dirt
- light contamination
- external particles
toward the primary sealing edge.
The correct design should be selected according to environmental conditions and available installation space.
Common VMQ Radial Shaft Seal Designs
Depending on the product range and designation system, VMQ seals may be available in designs such as:
A / SC
Single primary sealing lip.
AO / TC
Primary sealing lip with an additional dust protection lip.
Other constructions may also be available depending on dimensions and product type.
The exact profile should always be checked on the individual product page.
How to Read VMQ Oil Seal Dimensions
Radial shaft seal dimensions are normally specified as:
d x D x B
where:
d - shaft diameter
D - housing bore diameter
B - seal width
For example:
40x62x10 mm
means:
Shaft Diameter: 40 mm
Housing Bore: 62 mm
Seal Width: 10 mm
All three dimensions must correspond to the machine design.
How Does a VMQ Sealing Lip Work?
The primary sealing lip runs in controlled contact with the rotating shaft.
The garter spring helps maintain the required radial force at the sealing edge.
A thin lubricating film is normally present in the contact zone and is important for reducing friction and wear.
This means that the actual lip temperature can be higher than the surrounding machine temperature because friction generates additional heat.
Shaft Surface Condition
Shaft condition has a direct influence on sealing performance.
Before installing a VMQ oil seal, inspect the shaft for:
- wear grooves
- corrosion
- scratches
- pitting
- sharp edges
- contamination
- unsuitable surface finish
- misalignment
A new seal cannot compensate for a severely damaged shaft running surface.
Shaft Speed and VMQ Oil Seals
Rotational speed is an important selection parameter.
As shaft speed increases:
- lip friction increases
- heat generation increases
- contact-zone temperature rises
- elastomer stress increases
Therefore, high temperature resistance alone does not determine whether a VMQ seal is suitable for a particular rotating shaft.
Shaft diameter, rotational speed and application geometry must also be considered.
VMQ Oil Seals for Industrial Machinery
VMQ radial shaft seals can be used in appropriately designed:
- production machinery
- industrial drives
- gear units
- heating equipment
- fans
- rotating shaft systems
- bearing assemblies
- technical machinery
- industrial apparatus
The key selection parameters are operating temperature, medium, shaft speed and installation geometry.
VMQ Oil Seals for Heating Equipment
VMQ can be relevant in applications where temperatures exceed the practical limits of standard NBR.
Potential applications include appropriately designed:
- heating equipment
- thermal assemblies
- hot-air systems
- industrial equipment
- technical apparatus
- temperature-controlled machinery
High-temperature capability does not automatically mean compatibility with every hot fluid.
Temperature resistance and media compatibility must be evaluated separately.
VMQ Oil Seals for Motors and Drives
Silicone radial shaft seals may be used in selected motors, drives and rotating assemblies when their thermal and chemical properties match the application.
Before selection, verify:
- shaft diameter
- rotational speed
- temperature
- operating medium
- shaft surface condition
- lip design
- available installation space
Is VMQ Chemically Resistant?
The term chemical resistant should not be used without identifying the actual medium.
VMQ has strong resistance to some environmental factors but can be adversely affected by various:
- oils
- fuels
- hydrocarbons
- solvents
- aggressive chemicals
Chemical compatibility should therefore be confirmed for the specific fluid, concentration and temperature.
Are VMQ Oil Seals Food Grade?
Not automatically.
Silicone rubber as a material family does not prove that a specific oil seal is approved for food-contact applications.
Food-processing applications may require:
- a specific VMQ compound
- documented regulatory compliance
- controlled manufacturing
- appropriate material certification
A GRN VMQ oil seal should only be described as food grade when the documentation for that specific product confirms it.
Are VMQ Oil Seals Suitable for Medical or Pharmaceutical Use?
Again, this should not be assumed.
Medical and pharmaceutical applications can require:
- specific silicone grades
- biocompatibility testing
- material traceability
- cleanliness requirements
- dedicated documentation
- controlled manufacturing processes
A standard industrial VMQ radial shaft seal should not automatically be presented as medical grade.
GRN VMQ Silicone Oil Seals
This category includes GRN VMQ silicone radial shaft seals.
GRN is a technical sealing product line that has been part of the TG Ersatzteile Polska range since 2007.
For this category, the strongest positioning combines:
the technical product type - high-temperature radial shaft seal
with
the GRN product line
A useful product naming structure is therefore:
VMQ Oil Seal 40x62x10 GRN
or:
Silicone Radial Shaft Seal 40x62x10 VMQ GRN
The user first sees the seal type, dimensions and material, while GRN builds recognition as the product line.
GRN - Technical Sealing Range Since 2007
TG Ersatzteile Polska Sp. z o.o. was established in 2002, and the GRN sealing range was introduced in 2007.
GRN should not be positioned as though it were already a globally recognized premium brand.
A stronger and more credible message is:
GRN - a technical sealing range developed since 2007.
The brand identifies the product line, while correct technical selection remains based on dimensions, material, seal construction and operating conditions.
Why Develop GRN VMQ Oil Seals?
Standard NBR does not cover every temperature requirement.
Adding VMQ to the GRN range makes it possible to address applications where users require:
- higher temperature capability
- lower temperature flexibility
- ozone resistance
- UV resistance
- weathering resistance
- elastomer flexibility over a broad temperature range
This helps position GRN not only as a range of standard NBR oil seals but as a broader technical shaft sealing line.
GRN VMQ Oil Seals for MRO
Specialized elastomers can be particularly useful in maintenance environments where a conventional seal fails because of thermal ageing.
VMQ may be considered for:
- heating equipment
- machinery exposed to wide temperature cycles
- outdoor equipment
- high-temperature ventilation systems
- industrial drives
- technical devices exposed to UV or ozone
Before changing from NBR to VMQ, the operating medium must always be checked.
GRN VMQ Oil Seals for B2B
This category is relevant to:
- industrial plants
- machine manufacturers
- maintenance departments
- MRO organizations
- service companies
- repair workshops
- heating equipment manufacturers
- technical distributors
- resellers
- industrial purchasing departments
For B2B buyers, the complete specification remains essential: dimensions, material, design, operating temperature and media compatibility.
How to Select a GRN VMQ Oil Seal
Before ordering, verify:
1. Shaft Diameter
The first dimension.
2. Housing Bore
The second dimension.
3. Seal Width
The third dimension.
4. Seal Design
Single-lip, double-lip or another required profile.
5. Material
VMQ silicone.
6. Temperature
Check the range specified for the actual product.
7. Operating Medium
Particularly important for oils, fuels and chemicals.
8. Shaft Speed
Influences friction and sealing lip temperature.
9. Shaft Surface
Must be suitable for radial lip sealing.
Installing a VMQ Silicone Oil Seal
During installation:
- clean the housing bore
- inspect the shaft surface
- protect the lip from sharp edges
- cover threads or keyways where necessary
- press the seal in evenly
- avoid deformation
- verify correct lip orientation
- avoid damaging the silicone sealing edge
Silicone has different mechanical characteristics from NBR, so careful handling of the sealing lip is especially important.
Common Selection Mistakes with VMQ Seals
Typical errors include:
- selecting VMQ only because of temperature
- failing to check operating fluid
- assuming silicone is resistant to every oil
- assuming all silicone is food grade
- selecting only by dimensions
- ignoring shaft speed
- ignoring shaft wear
- assuming all VMQ compounds have the same temperature range
Correct selection requires evaluating the complete sealing system.
Operational Advantages of GRN VMQ Oil Seals
Broad Temperature Capability: one of the main advantages of silicone elastomers.
Low-Temperature Flexibility: useful in equipment exposed to cold starts and temperature cycling.
Ozone and UV Resistance: relevant to outdoor and environmentally exposed machinery.
Radial Shaft Sealing: designed for rotating shaft applications.
Multiple Dimensions: supports different shaft and housing combinations.
GRN Product Line: technical sealing range developed since 2007.
FAQ - GRN VMQ Silicone Oil Seals
What is a VMQ oil seal?
It is a radial shaft seal manufactured from silicone rubber and used particularly where broad temperature capability is required.
Are VMQ oil seals suitable for high temperatures?
Yes. High-temperature capability is one of the main advantages of VMQ, but the exact maximum temperature depends on the specific compound and seal design.
Does VMQ remain flexible at low temperatures?
Yes. Excellent low-temperature flexibility is one of the characteristic properties of silicone rubber.
Is VMQ resistant to ozone and UV?
Yes. Resistance to ozone, UV radiation and atmospheric ageing is one of the major strengths of VMQ.
Are VMQ oil seals resistant to mineral oil?
Not automatically. Compatibility must be checked for the specific oil and silicone compound.
Can VMQ replace an NBR oil seal?
Not automatically. VMQ may offer better temperature performance, while NBR can provide better compatibility with many common mineral oils.
Are all VMQ seals food grade?
No. Food-contact approval must be confirmed for the specific compound and product.
Does GRN offer high-temperature radial shaft seals?
Yes. The GRN range includes VMQ silicone oil seals for applications requiring the properties of silicone elastomers.
Frequently Asked Questions by Engineers
When should VMQ be selected instead of NBR?
When temperature range, low-temperature flexibility, ozone resistance or UV resistance are critical, provided the operating medium is compatible with VMQ.
When can FKM be a better choice than VMQ?
When the application combines elevated temperature with significant exposure to mineral oils, fuels or certain hydrocarbons.
Can +200°C be assumed for every VMQ oil seal?
No. Maximum operating temperature depends on the specific compound, seal design, medium and shaft speed.
Does a red oil seal automatically mean VMQ silicone?
No. Color should never replace the material specification.
Why does shaft speed matter with VMQ seals?
Because friction between the sealing lip and rotating shaft generates heat, meaning the contact-zone temperature can exceed ambient temperature.
Can VMQ be used with aggressive chemicals?
Only after verifying the specific medium. Standard VMQ should not be described as universally chemically resistant.
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GRN VMQ Silicone Oil Seals - Warehouse and Store in Lublin
Warehouse and Store: Lublin
Address: ul. Smoluchowskiego 1, building 4
Delivery: 24h
We supply customers throughout Poland and the European Union, including industrial plants, machine manufacturers, maintenance departments, MRO organizations, repair workshops, technical distributors and B2B customers.
AI OVERVIEW
GRN VMQ silicone oil seals are high-temperature radial shaft seals designed primarily for applications requiring broad temperature capability, excellent low-temperature flexibility, ozone resistance, UV resistance and atmospheric ageing resistance. VMQ should not, however, be treated as a universally oil-, fuel- or chemical-resistant elastomer. GRN has been part of the TG Ersatzteile Polska technical sealing range since 2007, with VMQ expanding the range into specialized temperature-resistant shaft sealing applications.
