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Black rubber O-rings in different sizes on a graphite surface

RUBRINGS / O-RING SPECIALISTS

Small component.
Extraordinary
responsibility.

RUBRINGS / THE PRODUCT FILM

O-RINGS. EVERY DETAIL IN FOCUS.

RELIABLE SEALS. LASTING PERFORMANCE.Material compatibilityDimensional accuracyApplication-led selection

01 / PRODUCT FOCUS

One small seal.
Many precise profiles.

Rubber O-rings for industrial applications in India. Explore the profile, then define the material and dimensions.

COMING SOON

Oil seals

Rotary shaft, V-ring and cassette seal information will be added in a future range update.

COMING SOON

Hydraulic seals

Rod, piston, wiper and guide products are planned for a later release.

Profile diagrams show cross-section concepts, not finished-product drawings. Availability and final specifications are confirmed against the enquiry.

02 / MATERIAL INTELLIGENCE

The right material.
The difference that matters.

Every environment asks something different of a seal. Start with the material, then specify the compound.

General selection guidance, not a Rubrings product datasheet. Final performance depends on compound, fluid, temperature, pressure and gland design. Read the selection guide.

DIMENSIONS / PRECISION, DEFINED

Every dimension
has a purpose.

A clear specification starts with two measurements. Add the operating conditions to make it an engineering brief.

O-RING / DIMENSIONAL REFERENCEFIG. 01
O-ring engineering diagram showing inside diameter and circular cross-sectionInside diameter (ID)Cross-section (CS)+

Specify as ID × cross-section, followed by material and hardness.

×
Outside diameter 31 mm
Geometry only: OD = ID + 2 × CS. Not a groove-design calculator.

Your specification checklist

Dimensions
Inside diameter × cross-section, with units
Size reference
Metric dimensions or a verified AS568 / ISO 3601 reference
Material
Polymer and compound grade
Hardness
Required Shore A value and tolerance
Temperature
Minimum, continuous and peak exposure
Pressure & movement
Working pressure; static or dynamic service
Fluid & environment
Chemical name, concentration and exposure
Read the O-ring sizing guide

03 / INDUSTRIES

Behind the systems
that keep things moving.

Start with the application. Select the seal around the real operating conditions.

01

Hydraulics
& pneumatics

Fluid compatibility, pressure, clearances and movement.

02

Pumps
& valves

Media exposure, temperature cycles and static or dynamic duty.

03

Automotive
& machinery

Operating fluids, vibration, heat and assembly requirements.

04

Water
& process systems

Water chemistry, cleaning cycles and contact approvals.

Automotive · Aerospace · Oil & gas · Chemical · Food processing · Pharmaceutical · Water treatmentExplore all 15 industries ↗

04 / RESOURCES & KNOWLEDGE

Better informed.
Better specified.

Useful answers for engineers, procurement teams and maintenance professionals.

01 / THE COMPONENT

Small ring.
Big responsibility.

An O-ring seals between mating surfaces. Its circular cross-section deforms inside a correctly designed groove.

02 / THE MATERIAL

Same shape.
Different strengths.

NBR, HNBR, FKM, EPDM, silicone and neoprene serve different conditions. Colour alone cannot identify a compound.

03 / THE APPLICATION

The right fit.
Beyond dimensions.

Size is the starting point. Fluid, temperature, pressure and movement complete the specification.

DIMENSIONS / 4 MIN READ

How to measure
an O-ring.

Understand ID, cross-section and the information a drawing needs.

Read sizing guide +
MATERIALS / 4 MIN READ

Six materials.
Which one fits?

Build a sensible material shortlist around your operating environment.

Read material guide +

Frequently asked

How do I specify an O-ring?

State inside diameter, cross-section, units, compound, hardness, fluid, temperature, pressure and quantity. Include a drawing or standard reference when available.

Does colour identify the material?

No. Colour is not a reliable material identifier. Confirm the compound code and supporting documentation.

Is there one universal pressure rating?

No. Pressure capability depends on the compound, hardness, clearance, temperature and seal arrangement. Use an application-specific review.

Can I choose an O-ring by size alone?

No. Two identical sizes can behave differently because of their material, hardness and operating environment.

05 / YOUR NEXT SEAL STARTS HERE

Bring the details.
Build a better brief.

Capture your O-ring requirements in one place. Download your brief for procurement or an engineering review.

Your information stays in this browser tab. This form downloads a brief; it does not send an enquiry.