Biocompatible and chemically resistant
Available in volumes ranging from 1μL to 20mL
For Rheodyne and some Valco valves*
PEEK sample loops are alternatives to stainless steel loops. The flexible PEEK loop ends are provided with a clean and straight cut for easy installation onto the valve. PEEK polymer is inert to almost all organic solvents and is biocompatible which gives PEEK loops added versatility. Rheodyne uses natural PEEK for these sample loops.
Like metal loops, size designations of PEEK loops are nominal. Actual volumes can differ from the theoretical designations because of the 0.05mm (0.002μ) tolerance of the tubing bore. Accuracy of large PEEK loops (0.8mm, 0.030μ bore) is about 14%, intermediate loops (0.5mm, 0.020μ) 21%, and small loops (0.2mm, 0.007μ) 65%. (If your application requires volume calibration, select CA-1 from "Use With Parts" to order calibration.)
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. Several of our PEEK Sample Loops can also be used with Valco/VICI sample injectors.
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 tubing.
For more information, see Sample Loops on the Rheodyne website.
