Rheodyne® Model 7725 and 7725i Injectors

  • The Rheodyne Model 7725 injector allows injection of 1 μL - 5 mL samples with accuracy and precision. The rugged, easily maintained design offers many advanced features:Make Before Break (MBB) Patented continuous flow design - flow is uninterrupted when switched from LOAD to INJECT
  • Easy seal adjustment using pressure screw on front of injector
  • Easy access to fittings

The injector includes a 20 μL sample loop and is supplied with a VESPEL rotor seal that can be replaced with a Tefzel® rotor seal for operation at pH 0-14 (use VESPEL seals to pH 10). Factory set at 5000 psi (345 bar), adjustable to 7000 psi (483 bar). Model 7725i has an internal position-sensing switch.
Figure A. A conventional HPLC valve mementarily interrupts flow during sample injection, subjectin...
Figure B. Model 7725 injectors also feature a wide port angle (30°), for easy access to the...

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57635 Needle port cleaner
55049 RheBuild® Kit for use with 7725/7725i/7726
57620-U Rheodyne® Injector Rheodyne 7725
57621 Rheodyne® Injector Rheodyne, 7725i
57633 Rotor Seal for Model 7125/7725/7725i Injector Tefzel®
58830-U Rotor Seal for Model 7125/7725/7725i Injector Vespel
57623 Sample Loop for Model 7725 Injector volume 5 μL
57624 Sample Loop for Model 7725 Injector volume 10 μL
57625 Sample Loop for Model 7725 Injector volume 20 μL
57626 Sample Loop for Model 7725 Injector volume 50 μL
57627 Sample Loop for Model 7725 Injector volume 100 μL
57628-U Sample Loop for Model 7725 Injector volume 200 μL
57629-U Sample Loop for Model 7725 Injector volume 500 μL
57630 Sample Loop for Model 7725 Injector volume 1 mL
57631 Sample Loop for Model 7725 Injector volume 2 mL
57632 Sample Loop for Model 7725 Injector volume 5 mL
57634 Stator Face Assembly for use with model 7725 injector
57636 Valve angle bracket for use with all metal Rheodyne valves