Engineering guides
Screen Elastomer Materials by Exposure, Then Specify the Compound
Use material-family references to ask better questions without turning general NBR, EPDM or FKM guidance into a finished-part guarantee.
Read guide
Sealing rings
Custom O-Rings
Round-section sealing rings for defined glands, with size, compound and acceptance criteria agreed for the actual joint.
Custom component seriesDrawing / sample review
- Ring size
- Inner diameter × cross-section in mm, or named inch size standard and edition
- Gland
- Groove dimensions, mating diameters and clearance in mm
- Material
- Required compound identification or medium for screening; availability to be reviewed
- Hardness
- Required value, scale and test method if specified
A round section for a defined gland
Use this family when the assembly is designed around a circular cross-section ring. A ring that matches a bore diameter can still have the wrong section or gland fill. Share the housing drawing so the free ring size and installed condition can be reviewed together.
- Identify face, radial piston or radial rod sealing.
- Mark whether the joint is static or moving.
- State which drawing or named size standard controls the order.
Specification starts at the interface
Separate ring dimensions from groove depth, width, surface condition and clearance. For an existing part, identify whether the sample is unused or has swollen, flattened or stretched in service. A sample is a useful comparison object but should not silently become the dimensional master.
Limits and customization
No universal pressure, temperature or chemical rating is assigned to this family. Compound identity, assembly stretch and the intended medium require review. Color, surface requirements and inspection quantities should be agreed in the purchase specification.
Prepare your inquiry
- Dimensioned ring and mating-gland drawings with revision.
- Fluid identity and any assembly lubricant.
- Motion type and pressure/vacuum cycle, with units.
- Order quantity, sample needs and requested documentation.
Buyer questions
Can I order from the inner diameter alone?
Include the cross-section and mating gland. An inner diameter without the section does not define an O-ring.
Does a standard size confirm the material?
No. Size identification and compound requirements are separate parts of the order.
Related project families
Engineering reading
- Measure a Rubber Seal Without Confusing the Part and the Joint
- Screen Elastomer Materials by Exposure, Then Specify the Compound
General references and scope
These references explain general engineering or regulatory context. They are not Xinwei finished-product specifications, test results or compliance evidence.
- O-Rings Online — General design inputs: O-ring size, housing layout, compression, stretch and housing fill are distinct review matters. Not Xinwei size availability or dimensional qualification.
SPECIFICATION REFERENCE
Define the part for its working conditions.
These are project discussion inputs. Compound, tolerances and validated performance require agreement for the specific part.
Specification reference
| Selection / definition | Reference and project conditions |
|---|---|
| Ring size | Inner diameter × cross-section in mm, or named inch size standard and edition |
| Gland | Groove dimensions, mating diameters and clearance in mm |
| Material | Required compound identification or medium for screening; availability to be reviewed |
| Hardness | Required value, scale and test method if specified |
| Exposure | Medium, concentration, continuous/peak temperature in °C and duration |
| Acceptance | Dimensional tolerances, visual limits and assembled leakage criteria |
KNOWLEDGE & SELECTION
Engineering reading
Engineering guides
Measure a Rubber Seal Without Confusing the Part and the Joint
Understand free-state dimensions, installed gaps and sample condition before copying an O-ring, gasket or custom-profile seal.
Read guideCONTINUE THE COMPARISON
Related product series.
Sealing rings
Rubber Seal Kits
Coordinated sets of rubber seals for an identified assembly or service operation, with each item controlled by position and revision.
- Kit BOM
- Item reference, drawing revision and quantity per kit
- Part identity
- Size/profile and compound requirement for every line item
Sealing rings
Custom-Profile Seals
Non-round sealing sections for retained grooves, lips or special contact surfaces that cannot be described as a standard O-ring.
- Section drawing
- Fully dimensioned cross-section in mm with functional surfaces marked
- Outline
- Closed-loop route, diameter or overall contour in mm
Sealing rings
Large-Diameter Sealing Rings
Sealing-ring projects for large covers and circumferences where handling, perimeter control and installation space need particular attention.
- Perimeter definition
- Nominal ID/OD or centerline route in mm; identify the controlling dimension
- Section
- Cross-section geometry and dimensions in mm
YOUR NEXT COMPONENT
Start with the application.
Define the part together.
Share your drawing or sample, working conditions, quantity and acceptance requirements with our team.