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VideosRheodyne - PEEK Sample Loops
Flexible PEEK sample loops are alternatives to stainless steel loops. PEEK loop ends are provided with clean, straight cuts for easy valve installation. 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. If the sample loop volume must be known, it is best to calibrate the loop in place on the valve so the flow passages in the valve are also taken into account. An alternative to calibration is to use a dual mode injector and partial-filling method of loading. See the “Sample Loop Loading” Application Note.
Please Note: Several of our PEEK Sample Loops can also be used with Valco/VICI® sample injectors.
Please refer to the product lisings below to aid selection.
| PEEK Loops for 3725; 3725(i) | ||||
| Part No. | UOM | Volume | Dimension | Valco No. |
| 3055-018 | EA | 2.0 mL | 1.6 mm (0.062”) ID x 1/8” OD | - |
| 3055-019 | EA | 5.0 mL | 1.6 mm (0.062”) ID x 1/8” OD | - |
| 3055-023 | EA | 10.0 mL | 2.0 mm (0.080”) ID x 1/8” OD | - |
| 3055-025 | EA | 20.0 mL | 2.0 mm (0.080”) ID x 1/8” OD | - |
| PEEK Loops for 9725; 9010; PR/EV750-100, PR/EV753-100 | ||||
| Part No. | UOM | Volume | Dimension | Valco No. |
| 9055-020 | EA | 5.0 μL | 0.18 mm (0.007”) ID x 1/16” OD | SL5CWPK |
| 9055-021 | EA | 10.0 μL | 0.25 mm (0.010”) ID x 1/16” OD | SL10WPK |
| 9055-022 | EA | 20.0 μL | 0.25 mm (0.010”) ID x 1/16” OD | SL20WPK |
| 9055-023 | EA | 50.0 μL | 0.51 mm (0.020”) ID x 1/16” OD | SL50WPK |
| 9055-024 | EA | 100.0 μL | 0.51 mm (0.020”) ID x 1/16” OD | SL100WPK |
| 9055-025 | EA | 200.0 μL | 0.51 mm (0.020”) ID x 1/16” OD | - |
| 9055-026 | EA | 500.0 μL | 0.76 mm (0.030”) ID x 1/16” OD | SL500WPK |
| 9055-027 | EA | 1.0 mL | 0.76 mm (0.030”) ID x 1/16” OD | SL1KCWPK |
| 9055-028 | EA | 2.0 mL | 0.76 mm (0.030”) ID x 1/16” OD | SL2KCWPK |
| 9055-029 | EA | 5.0 mL | 0.76 mm (0.030”) ID x 1/16” OD | - |
| 9055-033 | EA | 10.0 mL | 0.76 mm (0.030”) ID x 1/16” OD | - |
| PEEK Loop for 7725; 7725(i); PR/EV700-100 | ||||
| Part No. | UOM | Volume | Dimensions | Valco No. |
| 7123-227 | EA | 1 μL | internal groove (PR/EV700-100 only) | - |
| 7755-015 | EA | 2 μL | internal groove (7725 and 7725(i) only) | - |
| Rheflex Fittings (replacements) for PEEK loops | ||
| Part No. | Description | UOM |
| 6000-078 | Nut/Ferrule Set, Natural PEEK, 5/16-24, for 1/8” OD loops | EA |
| 6000-079 | Ferrules, Natural PEEK, for 1/8” OD loops | PK/5 |
| 6000-251 | Ferrules, Natural PEEK, for 1/16” OD loops | PK/10 |
| 6000-254 | Nut/Ferrule Sets, Natural PEEK, 10-32, for 1/16” OD loops | PK/10 |
