Foreach DPL30H-DS 600 kPa Brushed DC High-Pressure Miniature Liquid Diaphragm Pump, 3,000 h Service Life, 12 V / 24 V
The Foreach DPL30H Series Brushed High-Pressure Miniature Liquid Diaphragm Pump is designed for liquid transfer under higher-pressure conditions, with a no-load flow rate of 300 mL/min, a pressure rating of 600 kPa, a brushed motor, and a service life of 3000 h. It is suitable for automated instruments with higher tubing resistance, higher back pressure, or stable liquid-transfer requirements, and can be selected for IVD, life science, laboratory automation, and analytical instrument applications. Actual performance may vary with the medium, tubing, and operating pressure. Refer to the specification table below for detailed parameters. The stated service-life value applies at rated voltage under continuous operation.
Typical Applications:
High-back-pressure liquid transfer, cleaning-solution transfer, reagent transfer, liquid circulation
| Motor Type | Brushed DC Motor |
|---|---|
| Product Type | High-Pressure Miniature Liquid Diaphragm Pump |
| Rated Voltage | DC 24V ±10% / DC 12V ±10% |
| Rated Power | ≤7 W |
| Free-Flow Rate | 300 mL/min |
| Rated Pressure | 600 kPa |
| Self-Priming Height | 3 mH₂O |
| Working Medium | Purified water; other fluids require evaluation |
| Fluid Temperature | +5 °C–+40 °C |
| Port Size | Threaded Port, connects to 6 × 4 mm rigid tubing |
| Noise | ≤80 dB |
| Operating Temperature | +5 °C–+40 °C |
| Operating Relative Humidity | 30%–85% RH (Non-Condensing) |
| Pump Head Material | PP S |
| Diaphragm Material | EPDM / PTFE |
| Valve Material | EPDM / FFKM |
| Service Life | 3,000 h |
Typical Applications for a 300 mL/min 600 kPa High-Pressure Miniature Liquid Diaphragm Pump
A 300 mL/min high-pressure miniature liquid diaphragm pump is intended for high-resistance fluid paths that conventional low-pressure diaphragm pumps may not be able to serve, including narrow-bore tubing, filters, multiple valves, flow cells, needles and other components that create substantial pressure drop. The DPL30H has a free-flow rate of 300 mL/min, a rated pressure of 600 kPa and a self-priming height of 3 mH₂O for instrument fluid transfer requiring higher delivery pressure.
The 300 mL/min free-flow rate and 600 kPa rated pressure are not the same operating point. Selection must be based on the target flow, inlet conditions, discharge back pressure and total fluid-path resistance; it must not be interpreted as maintaining 300 mL/min at 600 kPa.
Depending on its function in the equipment, the same pump may be described as a high-pressure wash-solution pump, high-back-pressure transfer pump, rinse pump, auxiliary supply pump or circulation pump for a high-resistance fluid path.
1. High-Resistance Wash-Solution Pump for IVD, Biochemical and Analytical Instruments
In IVD, biochemical and other analytical instruments, wash solution may pass through solenoid valves, manifolds, filter assemblies, probes or narrow internal tubing before reaching the cleaning point. When several local restrictions are connected in series, the required pressure can be substantially higher than in an open, low-resistance transfer path.
In this type of circuit, the DPL30H can serve as a wash-solution or rinse pump for a high-resistance cleaning path. Whether the 600 kPa platform is required should be determined from the actual pressure drop at the target wash flow, not from the application label IVD washing alone.
2. Long-Line and Multi-Valve Liquid Transfer in Laboratory Automation
Laboratory automation equipment may contain a reservoir, solenoid valves, distribution manifolds, sensors, filters and multiple fluidic modules. Pressure losses accumulate when tubing is long or narrow, or when several valves and fittings are connected in series.
The DPL30H can be evaluated at the required operating point for auxiliary supply or washing circuits that must overcome this higher system resistance. The 300 mL/min value is a free-flow reference; installed flow still depends on tubing diameter and length, valve pressure drop, filter condition and discharge pressure.
3. Supply Upstream of Filters and Flow Cells in Analytical Instruments
Some analytical instruments must transfer liquid through filters, flow cells or other internal components with narrow passages. As filter resistance increases, or as the bore of the flow cell and connecting tubing decreases, the pump must generate a larger differential pressure to maintain the target flow.
The DPL30H can support non-metering auxiliary supply, washing and fluid-replacement duties in these circuits. Filter pressure drop may change from a new element to the end of its service interval, so selection should include the worst-case operating point after filter loading rather than only the initial condition.
4. Pressurized Transfer Through Needles, Narrow Tubing and Small Outlets
Needles, capillaries, small-ID rigid tubing and other small outlets increase flow resistance, and the resulting pressure drop changes significantly with flow rate, fluid viscosity, bore and effective length.
When an instrument must perform washing, auxiliary supply or fluid replacement through these high-resistance components, the DPL30H can be evaluated against the required flow and calculated or measured pressure demand. Its high-pressure capability is used to overcome fluid-path resistance and does not make it a high-accuracy metering pump.
5. Liquid Circulation and Auxiliary Transfer with Higher Back Pressure
Some instrument circuits must deliver wash solution, buffer or another compatible liquid to a downstream module that is already under pressure, or circulate liquid periodically through a loop containing multiple valves, sensors and fluidic components.
In these systems, the operating point is governed by the pressure difference between the inlet and outlet together with total circuit resistance. If a conventional 100 kPa diaphragm pump is already close to or beyond its applicable range at the target flow, the DPL30H 600 kPa platform can be evaluated, but final selection must be based on a complete fluid-path test and a valid flow-pressure curve.
Brushed vs Brushless High-Pressure Miniature Liquid Diaphragm Pump: Which Should You Choose?
Brushed Motor
The brushed DPL30H version uses a brushed DC motor and has a specified service life of 3,000 h. It is suited to cost-sensitive instruments with a defined duty cycle where high-pressure transfer is not required for continuous long-term operation.
Mechanical brushes remain in contact with the commutator inside the motor, so extended operation produces brush-wear particles and mechanical commutation may generate arcing and transient electrical noise. If the complete instrument has stricter maintenance, internal-cleanliness or EMC requirements, the brushless version should be evaluated.
Brushless Motor
The brushless DPL30H version uses electronic commutation, with no mechanical brush wear or brush-commutation arcing. Its specified service life is 10,000 h, making it better suited to high-resistance fluid systems that require longer operating periods or extended maintenance intervals.
Brushless operation does not eliminate electromagnetic interference. Electronic commutation and the driver circuitry can still generate electromagnetic noise, so final EMC performance must be verified with the complete power supply, wiring, grounding, shielding and control system.
Application Selection Note
For the DPL30H, 300 mL/min is the free-flow rate and 600 kPa is the rated pressure; they are not the same operating point. Define the target flow first, then calculate the total pressure differential created by narrow tubing, valves, filters, flow cells, needles, discharge pressure and inlet conditions, and confirm the actual operating point with a valid flow-pressure curve.
The DPL30H is intended for high-resistance or higher-back-pressure circuits that conventional low-pressure diaphragm pumps may not be able to serve. Final validation must also consider medium compatibility, duty cycle, inlet conditions, system back pressure, ambient temperature and equipment-life requirements.
Learn more: Operating point and selection of the DPL30H high-pressure miniature liquid diaphragm pump →Datasheet not yet available
The datasheet for this product has not been uploaded yet.
Frequently Asked Questions
DPL30H is a high-pressure miniature liquid diaphragm pump with a no-load flow rate of 300 mL/min and a pressure rating of 600 kPa. The standard DPL30 has the same no-load flow rating and a pressure rating of 100 kPa. DPL30H is more suitable for fluid paths with higher back pressure or tubing resistance.
Need help selecting a diaphragm pump?
Share the fluid, flow rate, pressure, self-priming requirements, wetted materials, port type, and installation space. The Foreach engineering team can help confirm a suitable diaphragm pump configuration.