Rheodyne 2 ul Sample Loop internal groove, PEEK for 7725i, 7725, 9725i, 9725, 9010 valves - 7755-015

Rheodyne 2 ul Sample Loop internal groove, PEEK for 7725i, 7725, 9725i, 9725, 9010 valves

Product Number: 7755-015

(Peek Loops for 9725 Injector only)

This 2µL internal groove PEEK and alumina ceramic sample loop fits 7725i, 7725, 9725i, 9725, 9010 valves. PEEK polymer and alumina ceramic are inert to most organic solvents and are considered biocompatible. This stator face assembly with an internal 2µL groove for sample loading replaces the standard stator face assembly and the external sample loop.

PEEK polymer is inert to almost all organic solvents and is biocompatible, giving PEEK loops added versatility. Natural PEEK is used for these sample loops. Like metal loops, the size designations of PEEK loops are nominal. The actual volumes can differ from the theoretical designations because of the ±0.05 mm (0.002") tolerance of the tubing bore. Accuracy of large PEEK loops (0.8 mm, 0.030" bore) is about ±14%, intermediate loops (0.5 mm, 0.020") ±21%, and small loops (0.2 mm, 0.007") ±65%.

PEEK loops are also supplied with unswaged RheFlex® fittings but do not require the same swaging precaution. The fittings can reposition along the loop tubing when the fitting reinserts in the ports for correct loop installation.

Please Note: Several of our PEEK Sample Loops can also be used with Valco/VICI® sample injectors. Please refer to the product lising on this page to aid selection.

Application Note

PEEK Physical Strength Characteristics
Although PEEK material is compatible with virtually all solvents, there are many factors that affect burst pressure of PEEK tubing. Factors such as increases in inner diameter, temperature, exposure time, and concentration of organic solvents affect the degradation of PEEK. Other solvents such a THF, methylene chloride and DMSO cause PEEK tubing to swell while concentrated nitric acid and sulfuric acid weaken the tubing.