ASI QuickSplit™ Fixed Flow Splitters

Unlike conventional splitters that use long lengths of capillary tubing, the ASI QuickSplit Fixed Flow Splitter uses two compact fluid resistor elements which are designed as cartridges for easy replacement. ASI fluid resistors are analogous to resistors used in an electrical circuit. Resistance values (L) are rated in PSI/mL/min. Because of the extremely low internal vlume of the fluid resistors, the solvent composition in voth resistors at any instant in time is the same, ant therefore viscosity changes associated with gradient runs do not impact the split ratio.

QuickSplit Fixed Flow Splitters provide a fixed split ratio with extremely low dead volume. Delay volume on the low flow rate side is as low as 100 nanoliters, depending upon the resistor cartridge selected. The split ration is not affected by changes in solvent viscosity or pressure, and is extremely stable and reproducible. The interchangeable fluid resistors are available in a wide range of values which make it possible to create split ratios from 1:1 to as high as 20,000:1.

The flow path of the QuickSplit Fixed Flow Splitter contains two fluid resistors that form a parallel flow path. Both low and high flow rat streams pass through fixed resistor cartridges. The ratio of these two resistors creates the split ratio.

Since the flow rate is indirectly proportional to resistance, changing the resistance in either flow path results in a change to the split ration. Changing resistance is accomplished by exchanging the fixed fluid resistor cartridges with a resistor set that has different resistor ratings.

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