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Rheodyne (IDEX Health & Science)

Valves and Fitting for HPLC

Manual Sample Injectors:

Rheodyne 7725/7725i front loading HPLC Sample Injectors are convenient in use, and provide chromatographers with superb performance and exceptional product lifetime.
  • Continuous flow during switching
  • A front-end Pressure Screw- for easy seal adjustment
  • Wide port angles - for improved access to fittings
  • Capability of reproducible 2 μl sample injections
 
Cat. no.
Description
7725
Sample Injector, SS
7725i
Sample Injector, SS, pos. sensing switch*
9725
Sample Injector, Peek
9725i
Sample Injector, pos. sensing switch*
* position sensing switch provides a chromatograph a start signal
 
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.
 
Rheodyne® Model 7125 Sample Injector
The Rheodyne Model 7125 syringe loading injector allows injection of the entire contents of the syringe into the sample loop – no need to flush the valve between injections except for trace analyses. It also injects samples from a partially filled loop saving time by eliminating the need to change the sample loop. The Model 7125 injector can be used at pressures up to 7000 psi (490 kg/cm2) and is supplied with a VESPEL® rotor seal for operation at pH 0-10 (use a Tefzel® seal at pH 0-14). A 20 μL sample loop is included; order additional loops separately. When selecting replacement seals, use VESPEL seals to pH 10; Tefzel seals to pH 14
 
Cat. No.
Description
7125
Sample Injector, including 20 μL sample loop
 

Rheodyne® Model 8125 Sample Injector
Model 8125 is designed for micro-scale analysis. This valve can be partially filled with 0.1 μL with zero sample loss. The 8125 has special small-bore 5, 10 and 20 μL loops. The standard valve is equipped with a 5 μL Loop but can be ordered with any loop attached. A 2.5 μL full scale syringe is available for high accuracy and precision in partial loading.

Cat. No.
Description
8125
Micro Scale injector with 5 μL Loop
87942
2.5 μL RN Syringe
7770-01
Replacement needles, 6/pk

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