ASI 545 Star Prep Pump: preparative HPLC pump with minimal pulsation and a wide flow range
The ASI 545 Star Prep Pump is designed for preparative chromatography where advanced pump functionality, low cost and reliable 24/7-werking need to be combined. The pump differs from the 540-serie in that it is designed primarily as a stand-alone metering pump. Gradient functionality is available via two separate options. Pulsation is at most 1% ΔP/P, making the 545 suitable for applications with the strictest requirements for minimising pulsation. For applications that are less sensitive to pulsation but require higher flow rates, the 546 Star Pilot Pump is the alternative.
Gradient options
The 545 is an isocratic metering pump as standard. Gradient elution can be achieved with two configurations.
The low-pressure proportioning valve controller combines a separate gradient controller with a proportioning valve block that mixes solvents at the inlet of a single pump. This is the simplest and most cost-effective gradient solution.
The high-pressure gradient controller drives several 545-pompen pumps, one per solvent, and generates a high-pressure gradient. The accuracy and reproducibility of high-pressure gradients are higher than with low-pressure mixing.
Self-priming pump head and maintenance
The pump head is self-priming with an integrated priming/purge function for quick solvent changes. The cartridge seal design makes seal replacement easy via the front panel without tools. All user-serviceable parts are accessible via the front panel.
Solvent compressibility compensation
The user can choose from a library of 15 standard solvents for automatic compressibility compensation, supplemented by 14 user-defined solvents for custom applications.
OEM options
The 545 is fully available for OEM private label. Pump assemblies including hydraulic module, wash pump, damper and servo controller on a base plate are available for integration into OEM chassis. ASI has supplied OEM pump assemblies for proteomics LC-MS, process instrumentation, pharmaceutical production, supercritical fluid chromatography, preparative chromatography, biotech and SEC/GPC systems.
Properties
- Pulsation: maximum 1% ΔP/P
- Flow precision: 0,25% at 10 to 100 mL/min
- Flow accuracy: ±100 µL/min or ±1% (whichever is higher)
- Gradient accuracy: ±1% with acetone/water at 5 to 95%, 100 mL/min
- Flow ranges: 150, 250, 500 and 1.500 mL/min (depending on model)
- Wetted materials: 316 stainless steel, PEEK, titanium, PTFE or UHMW, YSZ ceramic, sapphire and ruby
- Intuitive touchscreen display
- USB serial connection, computer GUI and Modbus RTU via USB or RS485
- Self-priming pump head with priming/purge
- Solvent compressibility compensation (15 standard + 14 user settings)
- Cartridge seal design for easy replacement
- Wash pump option available
- OEM private label available
- Power supply: 220/240 VAC, 50/60 Hz
Technical specifications
| Item number | Flow range | Max. pressure |
|---|
| 545-0150HP | 0,1–25 mL/min | 10.000 psi |
| 545-0150HP | 25–100 mL/min | 6.000 psi |
| 545-0150HP | 100–150 mL/min | 4.000 psi |
| 545-0150 | 0,1–100 mL/min | 6.000 psi |
| 545-0150 | 100–150 mL/min | 4.000 psi |
| 545-0250HP | 0,2–50 mL/min | 10.000 psi |
| 545-0250HP | 50–150 mL/min | 6.000 psi |
| 545-0250HP | 150–250 mL/min | 4.000 psi |
| 545-0250 | 0,2–250 mL/min | 4.000 psi |
| 545-0500 | 4–500 mL/min | 2.000 psi |
| 545-1500 | 10–1.500 mL/min | 500 psi |
| Feature | Value |
|---|
| Dimensions | 29,2 cm B × 52,7 cm D × 28,6 cm H |
| Weight | 29,5 kg |
| Power supply | 220/240 VAC, 50/60 Hz |
