Engineered for extremes
NR BOP 70S
Read the code: NR, BOP duty (blowout preventers), 70 Shore A, S for sulfur cure, recipe 01.
Development grade. The values below are design targets, not measured results. Each target becomes a typical value, with the number of lots and the test report behind it, as testing is completed.
A 70 Shore A natural rubber for annular BOP packing units in water-based mud and cold conditions: the highest resilience of any compound in the range, high tear strength, and flexibility to −30 °C.
- Polymer class
- NR
- Duty
- BOP: blowout preventers
- Pole mark
- HPLT
- Hardness
- 70 Shore A
- Temperature range
- -30 to 100 °C
- Lead time
- Trial quantities on request
- Minimum order
- 25 kg
- Issued
- 2026-10-28
- Revision
- A
- Packing
- Per order
Design targets and release limits
| Property | Target | Limits | Unit | Method |
|---|---|---|---|---|
| Hardness | 70 | 65 to 75 | Shore A | ASTM D2240 / ISO 48-4, 1 s |
| Tensile strength | 25 | min 22 | MPa | ASTM D412 die C / ISO 37 type 2 |
| Elongation at break | 600 | min 500 | % | ASTM D412 die C / ISO 37 type 2 |
| Tear strength | 70 | min 55 | kN/m | ASTM D624 die C |
| Rebound resilience | 60 | min 55 | % | ISO 4662 |
| Compression set, 22 h at 70 °C | 20 | max 30 | % | ASTM D395 method B, button |
| TR10 | -55 | max -50 | °C | ASTM D1329 / ISO 2921 |
| Heat ageing 70 h at 100 °C, tensile change | -15 | max -25 | % | ASTM D573 / ISO 188 |
Qualification plan
The grade code says what this compound is designed for. This table says what it has passed: a duty is claimed only once its report is on file.
| Test | Standard or method | Conditions | Status |
|---|---|---|---|
| Water-based mud ageing | In-house method, published with results | At 90 °C | Planned |
| Closure testing | API 16A, with an OEM or rebuilder | On the packing unit design | Planned |
| Low-temperature flexibility | ASTM D2137 brittleness and TR10 | Reported, no limit yet | Planned |
Design targets are the values the compound is designed to reach. They are not measured results and they are not a warranty. Release limits apply to lots once the recipe is approved. The grade code says what the compound is designed for; the qualification plan says what it has passed. Confirm suitability in your own application and fluids.
Every lot is supplied with a certificate of analysis. Enter the lot ID under Track on the website to see the lot record. Pascalor is an independent brand and is not affiliated with any polymer manufacturer named elsewhere on this site.
Registered entity name to be added | quotes@pascalor.com