Engineered for extremes
CR BOP 70X
Read the code: CR, BOP duty (blowout preventers), 70 Shore A, X for another cure system, 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 chloroprene for annular BOP packing units in oil-based mud at low temperature, where nitrile is too stiff and natural rubber swells.
- Polymer class
- CR
- Duty
- BOP: blowout preventers
- Pole mark
- HPLT
- Hardness
- 70 Shore A
- Temperature range
- -30 to 75 °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 | 20 | min 17 | MPa | ASTM D412 die C / ISO 37 type 2 |
| Elongation at break | 450 | min 350 | % | ASTM D412 die C / ISO 37 type 2 |
| Tear strength | 50 | min 40 | kN/m | ASTM D624 die C |
| Compression set, 22 h at 70 °C | 22 | max 30 | % | ASTM D395 method B, button |
| TR10 | -35 | max -30 | °C | ASTM D1329 / ISO 2921 |
| IRM 903, 70 h at 70 °C, volume change | +25 | max 35 | % | ASTM D471 / ISO 1817 |
| Ozone, 50 pphm, 20 % strain, 72 h at 40 °C | No cracks | no cracks | ISO 1431-1 |
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 |
|---|---|---|---|
| Oil-based mud ageing | In-house method, published with results | At 70 °C | Planned |
| Closure testing | API 16A, with an OEM or rebuilder | On the packing unit design | 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