Q-Grad Pump
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The Q-Grad Pump provides high-pressure quaternary gradients for many HPLC applications.
High Pressure Gradient at Low Pressure Cost
The Q-Grad Pump provides high-pressure quaternary gradients for HPLC applications. Four high-performance pumps are packaged into a single cabinet. The result is high-pressure gradient capability that is as economical as low pressure mixing systems.
Reliability and Simplicity
The Q-Grad Pump uses a very efficient pulse damper mixer to ensure high performance gradients. A prime-purge valve and upper and lower pressure limits are also standard. All SSI pumps carry a 3-year warranty.
Integrates Into Automated Systems
External synchronization from an injector or autosampler may be enabled through the pump control option using standard TTL or contact closures. The Q-Grad Pump is fully integrated into systems which utilize popular system-control software suites.
Simple, Effective Gradient Control
Our stand-alone keypad controller (System Control Unit SCU-460) gives you full gradient control of the the Q-Grad Pump. Or, the Q-Grad may be integrated into an existing system that utilizes popular system control and data acquisition software.
Either way, the Q-Grad supports Run/Stop inputs and real-time pressure monitoring. Each option is designed to be user friendly. You choose the interface that fits your needs.
Pump Specifications
Flow Rates…..0.001 - 5 mL/min. (each pump head)
Pressure…..0 – 5,000 psi (PEEK)
Pulsation…..± 2% @ 1mL/min and 1,000 psi
Gradient Accuracy…..within 1% absolute (of set value) @ 1 mL/min. and 1000 psi
Pressure Accuracy…..± 1% of full scale pressure
Flow Accuracy…..± 2%
Flow Precision…..0.2% RSD
Voltage…..110-120 Vac, 50-60 Hz; or 220-240 Vac, 50-60 Hz
Dimensions…..8.8” H x 15” W x 20.7” D (22.4 x 38.1 x 52.6 cm)
Weight…..42 lbs (19 kg)
Standard Pump Features
- Self-Flushing Pump Heads
- Pulse Damper for Reduced Pulsation
- Motor Stall Detector
- Prime Purge Valve
- Stainless Steel or PEEK Fluid Path
Standard Controls
- RS-232 Serial Com Port (each pump)
- Pressure monitoring and limits
Gradient Control
Simple, effective gradient control is achieved with our stand-alone SCU-460 keypad control unit.
Typical Pump Gradient Percent Range:
- 0-100% in 0.1% increments.
- Percents B, C, D programmable
- Percent A automatically adjusted.
Control Options
SCU-460 Keypad Controller (Part # WID2K2021101)
SCU-470 Keypad Controller (Part # WID2K1012601)