Silicone O-Ring 4x1 VMQ 70 Shore A Silicone Sealing Ring
4 pcs.
€4.17
(net)
Price for: 100pcs.
What Is the Silicone O-Ring 4x1 VMQ 70 Shore A?
The Silicone O-Ring 4x1 VMQ 70 Shore A is a precision sealing ring manufactured from VMQ (MVQ) silicone rubber with an inside diameter of 4 mm and a 1 mm cross section. With a hardness of 70 Shore A, it provides an excellent balance between flexibility and dimensional stability across a very wide temperature range. Unlike NBR O-rings, VMQ silicone offers outstanding resistance to UV radiation, ozone, weathering and thermal ageing, making it an ideal sealing material for outdoor applications, electronic devices and equipment exposed to extreme temperatures.
Why Choose VMQ (MVQ) Silicone?
VMQ silicone rubber is selected whenever conventional elastomers cannot provide sufficient temperature or environmental resistance.
Key material properties include:
- Wide operating temperature range
- Excellent UV resistance
- Excellent ozone resistance
- Outstanding weather resistance
- Excellent flexibility at low temperatures
- Good resistance to water
- Excellent electrical insulation properties
- Good resistance to thermal ageing
- Long-term elasticity
These characteristics make VMQ one of the most versatile elastomers for environmental sealing applications.
Technical Specification
Material: VMQ (MVQ, Silicone Rubber)
Hardness: 70 Shore A
Inside Diameter: 4 mm
Cross Section: 1 mm
Profile: O-Ring
Colour: Transparent or according to product variant
Operating Temperature: Approximately -60°C to +200°C
Resistance:
- UV radiation
- Ozone
- Weathering
- Hot and cold air
- Water
- Many aqueous solutions
Typical Applications
The Silicone O-Ring 4x1 VMQ 70 Shore A is commonly used in:
- Food processing equipment
- Laboratory equipment
- Electronic devices
- Industrial automation
- Water systems
- Sensors
- Measuring instruments
- Household appliances
- Outdoor equipment
- Electrical enclosures
- Lighting systems
Its excellent environmental resistance makes it particularly suitable for long-term outdoor service.
How Does a Silicone O-Ring Work?
The O-ring seals the gap between two mating surfaces by elastic deformation under compression.
It helps to:
- Prevent leakage
- Protect against moisture
- Block dust and contaminants
- Compensate for minor surface irregularities
- Maintain sealing performance over long service periods
The elasticity of VMQ allows the seal to remain effective even under significant temperature fluctuations.
When Should You Choose VMQ Instead of NBR?
A VMQ silicone O-ring is recommended when:
- High operating temperatures are expected
- Very low temperatures occur
- The seal is exposed to UV radiation
- Outdoor weather resistance is required
- Long-term elasticity is important
- Good electrical insulation is beneficial
For applications involving mineral oils and petroleum-based lubricants, NBR or FKM O-rings are generally the preferred choice.
Why Engineers Choose VMQ O-Rings
- Excellent temperature resistance
- Outstanding UV and ozone resistance
- Long-term flexibility
- Excellent weather resistance
- Good electrical insulation
- Reliable environmental sealing
- Suitable for indoor and outdoor applications
- Long service life under thermal cycling
Frequently Asked Questions (FAQ)
What does the size 4x1 mean?
It indicates an inside diameter of 4 mm and a 1 mm cross section.
Are VMQ and silicone the same material?
Yes. VMQ (MVQ) is the technical designation for silicone rubber used in industrial sealing applications.
Is a silicone O-ring resistant to high temperatures?
Yes. VMQ silicone typically operates in temperatures from approximately -60°C to +200°C, depending on the application.
Is VMQ resistant to UV radiation?
Yes. Excellent resistance to UV radiation and ozone is one of the primary advantages of silicone rubber.
Can a silicone O-ring be used with mineral oils?
VMQ is not generally recommended for prolonged contact with mineral oils. NBR or FKM O-rings are usually better choices for oil-based applications.
Where is the 4x1 VMQ O-ring commonly used?
It is widely used in electronics, laboratory equipment, sensors, automation systems, household appliances and outdoor equipment requiring resistance to temperature and weather.
