Rubber Seals and O-Rings
O-rings
O-rings in nitrile, EPDM, silicone and other elastomers, used to seal hydraulic systems, pneumatic systems, water filtration systems, automotive engines and industrial machinery.
Product Overview
O-rings in nitrile, EPDM, silicone and other elastomers, used to seal hydraulic systems, pneumatic systems, water filtration systems, automotive engines and industrial machinery. The O-ring is the simplest sealing element there is: a circular cross-section elastomer compressed in a groove, which is why it installs quickly and costs little, and why material selection rather than geometry is what decides whether it survives.
Key benefits
Why Buyers Choose This Specification
Material Decides Everything
The geometry is standardised, so the choice that matters is elastomer. Nitrile for oil, EPDM for water and steam, silicone for temperature extremes. Getting that wrong is the most common seal failure there is.
Installs in Seconds
A simple design ensures quick and hassle-free installation. On a machine with dozens of seals, that time is the real assembly cost.
Cost-Effective Sealing
An O-ring costs a fraction of any engineered seal and works in the great majority of static applications.
Works Across Fluid Types
Hydraulic fluid, compressed air, water and engine fluids are all sealed by O-rings with the right elastomer selected.
Application scenarios
Where It Is Used
- Hydraulic systems preventing fluid leakage between connected parts
- Pneumatic systems sealing air and preventing loss of pressure
- Water filtration systems ensuring no contaminants bypass the filter
- Automotive engine sealing
- Industrial machinery static and dynamic seals
- Replacement seals during machine maintenance
Who it is for
The Buyers This Product Suits
Machine Builders
Every hydraulic and pneumatic assembly uses O-rings in quantity, and consistency across the batch is what avoids assembly-line leaks.
Filtration Equipment Manufacturers
In a filter housing, the O-ring is what stops unfiltered fluid bypassing the element entirely.
Maintenance Departments
Holding the right materials in the right sizes is what turns a seal failure into a ten-minute repair.
Problems it solves
What It Fixes
Seals Swelling or Hardening in Service
Almost always a material selection error. Nitrile, EPDM and silicone each fail in the fluids the others handle.
Pressure Loss in Pneumatic Circuits
O-rings seal air and prevent loss of pressure at every connection in the circuit.
Contaminants Bypassing a Filter
The housing seal is what forces flow through the element rather than round it.
Specifications
Published Figures For This Product
Every value below comes from our own product specification. Where a figure is not published we leave it out rather than estimating it.
| Materials | Nitrile (NBR), EPDM, silicone and others |
|---|---|
| Hydraulic Systems | Prevents fluid leakage between connected parts |
| Pneumatic Systems | Seals air and prevents loss of pressure |
| Water Filtration Systems | Ensures no contaminants bypass the filter |
| Installation | Simple design, quick and hassle-free |
| Sizing | By inside diameter and cross-section |
| Grade | NBR, EPDM, silicone and more |
Packing and documents
How It Ships And What Comes With It
Packing And Loading
Shipping volume for this item depends on the configuration and capacity you select, so no fixed container figure is published. Confirm the specification and the destination and a loading plan is issued with the quotation, rather than a figure we cannot support.
Documentation On File
- Rubber Seals and Plastics · Rubber Seals and O-Rings Specification Sheet20.5 KB
- Catalogue · Full Product Catalogue154.0 KB
Sourcing And Inspection
This product is supplied through TrueGlow Imaging, working with manufacturing partners whose facilities are visited and verified rather than taken on trust. In-process quality control and delivery supervision are available so goods are inspected before the container is sealed. Certifications quoted on this page are those stated on the product specification and belong to that product range rather than to our trading entity, so ask for the certificate covering your specific item.
Handling guide
Getting It Right First Time
Step 1
Select the elastomer from the fluid and temperature first, then the size.
Step 2
Measure inside diameter and cross-section, not outside diameter.
Step 3
Check the groove dimensions give the correct compression, typically a defined percentage of cross-section.
Step 4
Lubricate compatible with the elastomer during installation to avoid pinching.
Step 5
Replace rather than reuse an O-ring after any disassembly.
Comparison
How It Compares In Our Range
The three most commonly specified elastomers.
| Nitrile (NBR) | Good oil and fuel resistance at low cost. The default for hydraulic and automotive fluid service. |
|---|---|
| EPDM | Resistant to water, steam and many chemicals, but not to petroleum oils. |
| Silicone | Wide temperature range and good for static sealing, with lower mechanical strength. |
FAQ
O-rings Questions
Which materials are available?
Nitrile, EPDM, silicone and other elastomers, selected for the fluid and temperature.
Where are O-rings used?
Hydraulic systems, pneumatic devices, water filtration systems, automotive engines and industrial machinery.
How do I choose the material?
By the fluid and the temperature. Send the fluid, pressure and temperature and a material is recommended.
Can you supply custom sizes?
Yes. Send the inside diameter, cross-section and material requirement.
Are they easy to install?
Yes. The simple design ensures quick and hassle-free installation.
What quantity can you supply?
From maintenance quantities through to production volumes. State your annual usage for a tiered price.
Related products
Other Products Buyers Look At
Industries
Sectors That Use This Product
Metal Fabrication and Machine Shops
Custom parts, tooling and the cranes that move them around the shop.
Warehousing and Heavy Industry
Lifting from 250 kg to 360 tons, indoors on a runway or outdoors on legs.
Food Packaging Lines
Depalletizing to palletizing, balanced against the filler in the middle.
Further reading
Guides That Cover This Product
Selecting an O-Ring Material NBR EPDM FKM or FFKM
Almost every seal failure is a material selection error rather than a dimensional one. The fluid and the temperature decide the elastomer, and the size is the easy part.
Quote O-rings
Send the capacity or size you need, the quantity and the destination, and we will confirm the configuration, the lead time and a loading plan.