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Product image O-ring 25×2.5 VMQ 70 Shore A

OR-VMQ70-25x2-5

O-ring 25×2.5 VMQ 70 Shore A

This VMQ silicone O-ring is the ideal choice for food contact, medical applications and extreme temperatures from -60 °C to +200 °C.

Product code
OR-VMQ70-25x2-5
Dimensions
25 × 2.5 mm
Material
VMQ · 70 Sh A

excl. VAT

From €0.21

€0.26 incl. VAT

In stockPovažská Bystrica warehouse

The minimum order is €5.00 excl. VAT. For smaller orders you pay the difference as a small-order fee — add more pieces to avoid it.

In stock in Považská Bystrica — delivery 1–3 business days from dispatch (SK), 3–5 days (EU)

    Certifications

    Add 9 more pieces — from 10 pcs the price is €0.18 per piece, excl. VAT.

    Need a price for a larger volume?

    VMQ O-ring 25 × 2.5 mm (inner diameter 25 mm, cross-section 2.5 mm). Outer diameter 30 mm. Hardness 70 Sh A. Temperature range -60 °C to 200 °C. Standard ISO3601-25x2.5. Certifications: FDA, USP Class VI.

    For a static seal of this size (outer diameter 30 mm), the ISO 3601-2 / Parker O-Ring Handbook ORD 5700 design guidance recommends a groove depth of about 1.95 mm and a groove width of about 3.25 mm for the 2.5 mm cross-section — roughly 22 % squeeze.

    Inner diameter (ID)
    25 mm
    Cross-section (CS)
    2.5 mm
    Outer diameter (OD)
    30 mm
    Size
    25x2.5
    Material
    VMQ
    Hardness
    70 Sh A
    Color
    red
    Temperature range
    -60 °C to 200 °C
    Standard code
    ISO3601-25x2.5
    ISO 3601 size
    25x2.5
    Product code
    OR-VMQ70-25x2-5
    Country of origin
    Germany
    Availability
    In stock

    Technical specifications

    Product data
    MaterialVMQ
    Hardness (Shore A)70 Sh A
    Colorred
    CertificationsFDA, USP Class VI
    Indicative values for VMQ
    Temperature range-60 °C to 200 °C
    Tensile strength8 MPa
    Ultimate elongation400 %
    Compression set22 %
    Density1.25 g/cm³

    These values apply to the VMQ material family as a whole, not to this specific size and hardness. Always verify suitability for your specific application before use.

    Cross-standard size references

    Standard code
    ISO3601-25x2.5
    ISO 3601
    25x2.5
    DIN 3771
    25x2.5

    Material properties

    Silicone rubber (VMQ) has an outstanding temperature range from -60 °C to +200 °C (short-term +230 °C) and excellent biocompatibility. It offers superb resistance to ozone, UV radiation, water, polar solvents, dilute acids and most foods. Available grades with FDA, USP Class VI, BfR, EC 1935/2004 and 3A certification for food and pharmaceutical industries. Its weak mechanical strength is compensated by static applications — not suitable for dynamic sealing functions with high friction loads.

    Material
    VMQ
    Chemical name
    Silicone Rubber (Methyl Vinyl Siloxane)
    Also known as
    Silicone, MVQ, Silastic
    Trade names
    Dow Corning Silastic, Wacker Elastosil, Shin-Etsu KE

    Suitable for various industries

    Silicone O-rings are used in the food industry (CIP/SIP systems, milking machines, packaging lines), medicine (inhalers, catheters, dialysis equipment), pharmaceuticals (fermenters, valves), cosmetics and high-temperature static sealing applications.

    Application notes

    Ideal for food industry, pharmaceuticals and static high-temperature seals. Avoid dynamic applications with mineral oils — weak mechanical strength. For heavy steam prefer peroxide-cured EPDM.

    Advantages

    • Extreme temperature range -60 °C to +200 °C (short-term +230 °C)
    • Excellent biocompatibility for food and medical applications
    • Available FDA, USP Class VI, BfR and 3A certifications
    • Resistant to ozone, UV and weathering
    • Available in colours (red, white, blue, transparent)

    Price tiers

    Quantityper piece
    from 1 pc€0.21
    from 10 pcs −14.3%€0.18
    from 100 pcs −28.6%€0.15
    from 1,000 pcs −38.1%€0.13

    Prices exclude VAT. The volume discount is applied automatically in the cart.

    Documentation

    Download datasheet (PDF)
    See all materials in size 25 × 2.5 mm

    Related products

    Equivalents, alternative materials, and cross-references.

    Same size — different material
    In stock

    O-ring 25×2.5 NBR 70 Shore A

    Dimensions
    25 × 2.5 mm · OD 30 mm
    Material
    NBR · 70 ShA

    Product code OR-NBR70-25x2-5

    €0.17excl. VAT

    Same size — different material
    Available to order

    O-ring 25×2.5 NBR 90 Shore A

    Dimensions
    25 × 2.5 mm · OD 30 mm
    Material
    NBR · 90 ShA

    Product code OR-NBR90-25x2-5

    €0.17excl. VAT

    Same size — different material
    In stock

    O-ring 25×2.5 FKM 80 Shore A

    Dimensions
    25 × 2.5 mm · OD 30 mm
    Material
    FKM · 80 ShA

    Product code OR-FKM80-25x2-5

    €0.41excl. VAT

    Same size — different material
    Available to order

    O-ring 25×2.5 EPDM 70 Shore A

    Dimensions
    25 × 2.5 mm · OD 30 mm
    Material
    EPDM · 70 ShA

    Product code OR-EPDM70-25x2-5

    €0.17excl. VAT

    Frequently asked questions about this O-ring

    What is the temperature range of a VMQ O-ring?
    This VMQ O-ring is rated for continuous service of roughly -60 to 200 °C. The material can withstand brief temperature peaks above this range, but near the limits service life drops significantly. If you operate at the edge of the range, ask our technician about a more suitable compound.
    What media is VMQ resistant to?
    VMQ is a silicone rubber with a very wide temperature range and excellent biocompatibility; its mechanical strength is low, however, so it is not suited to dynamic applications. It resists air, ozone and UV, water, polar solvents, and dilute acids — but not mineral oils, fuels, concentrated acids, alkalis, or high-pressure steam. Our material reference records FDA, USP Class VI, BfR, EC 1935/2004, and 3-A certifications for VMQ. That is an entry in our data about the material class — food or medical suitability is decided by the specific compound and batch, not by the material itself, so if you need a certificate, ask us for the documentation covering the specific item. For a specific medium, check compatibility in our chemical-resistance chart.
    What do the dimensions of this O-ring mean?
    The size 25 × 2.5 mm gives the inner diameter × cross section. The inner diameter must fit the groove or rod; the cross section sets the seal thickness. When replacing, do not confuse inner diameter with outer diameter. If you search by standard (AS568, ISO 3601, JIS), use our cross-reference finder.
    What does 70 Shore A hardness mean?
    A hardness of 70 Shore A expresses the stiffness of the rubber: a lower number (50–60) is softer and seals an uneven surface better, a higher one (80–90) better resists pressure and extrusion from the groove. Harder is therefore not simply better — it is a trade-off driven by pressure, groove clearance, and material: 70 ShA conforms to the surface better and seals well at standard pressures, while 80–90 ShA suits cases with higher pressure or a risk of abrasion and extrusion into the gap. Under high pressure, choose a harder material and possibly a back-up ring.

    Read the VMQ material guide