HNBR
HNBR Materials for Mechanical Sealing Parts
Evaluate HNBR candidates against the fluid, temperature and repeated mechanical loading of your component. Compound selection and part geometry should be reviewed together.
01 / HNBR
Identify the HNBR candidate and its task
Provide the existing compound or polymer grade, available acrylonitrile-content information and required properties. Explain whether the decision concerns fluid exposure, cold starting, repeated loading, friction or an existing failure. Hydrogenation or one property value alone does not qualify a part for every medium and mechanical duty.
02 / HNBR
Describe the fluid and operating sequence
For oil or a glycol-containing coolant, identify the full product, concentration and additives. Include cleaning, mixing, contact duration and the actual temperature and pressure history.
| Input | Details to define |
|---|---|
| Candidate | Compound code, polymer reference, available composition data and specification revision |
| Fluid | Complete oil or formulated coolant, concentration, additives and cleaning |
| Temperature | Cold start, normal duty, peaks, dwell and recovery |
| Pressure | Operating changes, pressure release, gas contact and interruptions |
| Interface | Drawing, mating gap, compression, support and installation |
| Movement | Stroke or rotation, speed, loading and counterface |
| Evidence | Identified specimens and parts, method, conditions and acceptance criteria |
03 / HNBR
Evaluate the actual mechanical requirement
Define the motion and load before comparing candidates. For friction or wear, include lubrication, surface finish, contaminants, temperature and test configuration. Compare reports from identified compounds and representative samples rather than ranking all HNBR formulations together.
- Distinguish material tensile data from the installed load case.
- Separate starting force, running friction, wear and leakage observations.
- Record the sample geometry, conditioning and endpoint used for comparison.
04 / HNBR
Keep pressure and thermal exposure with the assembly
For a pressure-loaded seal, define the pressure cycle, release sequence, extrusion gap and support together with media and temperature. Agree the necessary part and assembly trials. A compound’s hardness or an air-aging result does not establish the pressure capability or life of an installed component.
05 / HNBR
Agree the sample and repeat-order specification
Send the drawing revision, quantity, reference material and required evaluation. Link each result to its compound and sample lot, then agree dimensions, material criteria and the assembly approval. If comparing HNBR with an NBR candidate, use the same defined duty. Confirm packaging, release records and change review before regular supply.
From your requirements to a component review
Review an HNBR Application
Send your drawing or describe the application. Include service conditions, material requirements and quantity.