The P500+/P1000+ high-pressure constant-flow pump is a dual-plunger parallel reciprocating infusion pump specifically designed for high-performance liquid chromatography (HPLC) preparative and semi-preparative applications. It features the following core characteristics: High flow rate and stability: Driven by an AC servo motor, it offers high power output, smooth and precise operation, and is specifically engineered for preparative experiments at high flow rates, ensuring accuracy and reproducibility of results under such conditions.
Intelligent correction and high precision: Featuring dual correction functions for mobile phase compression coefficient and flow rate accuracy (±15% error compensation), it ensures exceptionally precise flow rate measurement.
Safe gradient preparation capability: By connecting to the chromatography workstation via RS485 interface, a high-precision binary high-pressure gradient system can be established, enabling program-controlled adjustment of mobile phase composition and flow rate. Equipped with real-time pressure monitoring, dual protection of high/low pressure limit alarms and mechanical safety valves (automatically depressurizing upon exceeding set pressure), and over-temperature alarm (85°C) to ensure operational safety.
High-flow rapid displacement: Supports high-flow flushing at up to 80% of maximum flow rate, significantly reducing solvent displacement time and improving work efficiency.
Durable and easy to maintain: The floating guide plunger installation method, combined with imported high-quality plunger rods and sealing rings, ensures long-term operational stability and durability; the modular design facilitates routine maintenance.
Flow rate range: P1000+: 1–1000 mL/min (step 1 mL/min); P500+: 1–500 mL/min (step 1 mL/min).
Maximum working pressure: P1000+: 20 MPa (flow rate 0–500 mL/min); 10 MPa (flow rate 501–1000 mL/min);. P500+: 20 MPa (flow rate 0–500 mL/min).
Pressure accuracy: Display error <±5% (or 0.5 MPa).
Pump seal: Maintains 20 MPa for 10 minutes with pressure drop ≤ 1.5 MPa.
Operating temperature: 0–40°C.
Operating humidity: ≤ 80%.
Power supply: AC 220 V±10%,50/60 Hz.
Power consumption: 800 W.
Dimensions: 350 mm × 600 mm × 230 mm (length × width × height).
The P500+/P1000+ High-Pressure Constant-Current Pump is a core infusion unit specifically designed for high-performance liquid chromatography (HPLC) preparative and semi-preparative workflows, capable of delivering mobile phases stably and precisely across a wide flow rate range. It supports binary high-pressure gradient analysis and flow rate program control, enabling the separation, purification, and preparation of complex samples (e.g., products in chemical, pharmaceutical, and biochemical fields). This pump is suitable for industrial production and research scenarios requiring high sample loading capacity and high flow rates. Through workstation integrated control, it can complete the entire process from method development to large-scale production, meeting the stringent requirements of preparative chromatography for high stability, high precision, and operational safety.