What is a TR10 test?

This test method provides the temperature retraction procedure for the rapid evaluation of crystallization effects and compares the viscoelastic properties of rubber and rubber-like materials at low temperatures. TR testing is useful in determining a material’s suitability for low-temperature service.

What is low-temperature test?

The test is a measurement of the retraction of material by 10% (TR10) and the temperature at which the material retracts by 70% (TR70), which is when crystallization tends to occur may correlate with low-temperature compression set.

What happens to an elastomer when it is below its glass transition temperature?

When cooled from the melt state to a temperature below the glass transition temperature, the hard blocks phase separate to form rigid domains that act as physical crosslinks for the elastomeric blocks.

Which seal material works well for machines operating at extremely low temperatures?

The most commonly sought after elastomeric material for use with aggressive chemicals is FFKM. The well known sealing brand DuPont™ offer a Kalrez® perfluoroelastomer designed to provide the best sealing performance under extreme low temperature working conditions.

What is cryogenic test?

During cryogenic testing components are enclosed in an insulated tank and immersed in liquid nitrogen with 100% Helium as the search gas in order to simulate operating conditions. Our state-of-the-art computer systems monitor for seat leakage, temperature and pressurisation.

What is cryogenic test for valves?

Valves can be tested at any controlled temperature down to -196°C (boiling-point of liquid nitrogen). The parameters we monitor include the measurement of leakage for seats and body, operating torques, and cycling under typical low temperature or cryogenic conditions.

Does Teflon shrink when cold?

If PTFE components are exposed to extremely cold temperatures, they can shrink beyond your dimensional tolerances.

Are cryogenics cold?

cryogenics, production and application of low-temperature phenomena. The cryogenic temperature range has been defined as from −150 °C (−238 °F) to absolute zero (−273 °C or −460 °F), the temperature at which molecular motion comes as close as theoretically possible to ceasing completely.

What metal does not freeze?

Aluminum and titanium alloys are an appropriate choice for things expected to reach this temperature. -75° to -100° Celsius temperatures are cold enough that low carbon steels are typically the most reliable choice.

What is the coldest metal on earth?

A chunk of copper became the coldest cubic meter (35.3 cubic feet) on Earth when researchers chilled it to 6 millikelvins, or six-thousandths of a degree above absolute zero (0 Kelvin).

What is PTFE temperature rating?

-400 to 500°F
PTFE mechanical properties are low compared to other engineering plastics, but its integrity is maintained over a wide temperature range – from -400 to 500°F (-240 to 260°C).

What is cryogenic testing?