Rheodyne® Model 3725i Preparative Sample Injector

Model 3725i sample injectors for 1-10 cm I.D. HPLC columns combine the ease of use and versatility of Rheodynes analytical-scale injectors with the ability to handle large samples and high flow rates. Rugged and easily maintained, in a choice of stainless steel or PEEK flowpaths. Includes 10 mL sample loop, 1/8 in. fittings for all ports, 5cm large-bore syringe needle (16 gauge/0.65 in. OD) for rapid injection of large samples, needle port cleaner, two vent tubes, wrenches, mounting screws, and instructions.
Features and Benefits
  • Unique, patented, continuous flow design - flow is uninterrupted when you switch from LOAD to INJECT
  • Position-sensing switch provides a reproducible start signal
  • Easy seal adjustment using pressure screw located on front end
  • Wide port angles (30°) for easy access to fittings

Specifications
Tubing and Fittings: 1/8 in.
Valve Flow Passages: 1 mm/0.04 in.
Flow Rates: 10-800 mL/min
Pressure Rating1: Model 3725i: 276 bar/4000 psi
Model 3725i-038: 345 bar/5000 psi

1Usable pressure depends on sample loop ID, organic solvent concentration and organic solvent exposure time.

Needle for Model 3725i Prep Sample Injector

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57475 Needle for Model 3725i Prep Sample Injector PEEK
57476 Needle for Model 3725i Prep Sample Injector stainless steel, needle size 16 ga

RheBuild® Kit

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55043 RheBuild® Kit for use with 3725/3725I/3725-038/3725I-038

RheFlex® PEEK Fittings

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57477 RheFlex® PEEK Fittings Fitting set, 1/8 in. tubing

Rheodyne® 3725i Rotor Seal

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57473 Rheodyne® 3725i Rotor Seal for use with 3725i Injector

Rheodyne® Fittings

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57479 Rheodyne® Fittings nut and ferrule for 1/8 in. tubing, pkg of 1 ea

Sample Injectors

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57461 Rheodyne® Model 3725i Preparative Sample Injector PEEK
57463 Rheodyne® Model 3725i Preparative Sample Injector stainless steel

Sample Loops for Model 3725i

Supplied with unswaged fittings for connection to Model 3725i injector.

Two 1/8 in. x 1/16 in.reducing unions (Cat. No. 22999), two short pieces of 1/16 in. capillary tubing, and 1/16 in. nuts and ferrules are needed to connect a preparative sample loop to a valve with 1/16 in. ports.

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57470-U Sample Loop for Model 3725i Prep Sample Injector stainless steel, volume 10 mL
57466-U Sample Loop for Model 3725i Prep Sample Injector PEEK, volume 10 mL
57468-U Sample Loop for Model 3725i Prep Sample Injector stainless steel, volume 2 mL
57464-U Sample Loop for Model 3725i Prep Sample Injector PEEK, volume 2 mL
57465 Sample Loop for Model 3725i Prep Sample Injector PEEK, volume 5 mL
57467 Sample Loop for Model 3725i Prep Sample Injector PEEK, volume 20 mL
57469 Sample Loop for Model 3725i Prep Sample Injector stainless steel, volume 5 mL
57471 Sample Loop for Model 3725i Prep Sample Injector stainless steel, volume 20 mL

Stator Face Assembly

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57474 Stator Face Assembly for use with model 3725 injector