No coin nor oath required. For personal study only.
These selection and qualification procedures are expensive and time-consuming. To eliminate the testing of unsuitable elastomers, short-term laboratory tests are used to give a guide to the long-term performance of the compound.
Test methods that are available to elastomer suppliers without the need for expensive equipment present a significant advantage. Traditional hardness, tensile and tear-strength data are good for QC work but do not predict seal-system performance.
The CS test, with a 24-hour unconstrained reheat cycle, is suggested as a test that does come close to predicting performance. It also offers good repeatability as a quality test. This method is particularly interesting as it does correlate well with the more complicated stress-relaxation test methods.
๐ SIMILAR VOLUMES
## Rapad Rabbit LLC, USA A lift pump plunger for an oil or gas well is described where a feature of the plunger is that it has a thermoset seal on the plunger to improve the pumping. The seal may be a composite material and the design also facilitates easy seal replacement. Few actual seal details
Constant velocity joint having a non-rotating boot