KNF FP1.7 Low-Pulsation Diaphragm Liquid Pump
| Brand | KNF |
|---|---|
| Origin | Switzerland |
| Pump Type | Diaphragm Pump |
| Product Category | Oil-Free Liquid Transfer Pump |
| Max Flow Rate | 0.07 L/min |
| Max Operating Pressure | 6 bar (rel.) |
| Max Suction Lift | 2 mWg |
| Motor Power | 2 W |
| Weight | 150 g |
| Diaphragm Materials | EPDM, PTFE |
| Valve Materials | EPDM, FFKM |
| Pump Head Material | PPS |
| Motor Options | DC, Brushless DC |
| Compliance | FDA-compliant materials |
| Features | Self-priming, dry-run capable, maintenance-free, digitally adjustable speed |
Overview
The KNF FP1.7 is a compact, high-integrity low-pulsation diaphragm liquid pump engineered for precise, contamination-free fluid handling in analytical, medical, and industrial laboratory environments. Based on KNF’s proven positive displacement diaphragm technology, the FP1.7 operates without lubricants or internal seals, eliminating risk of media contamination and enabling reliable transfer of neutral, aggressive, and shear-sensitive liquids—including acids, solvents, and biological buffers. Its core architecture employs a reciprocating elastomeric diaphragm actuated by a magnetically coupled DC or brushless DC motor, ensuring consistent volumetric displacement with minimal flow pulsation (< ±3% peak-to-peak under steady-state conditions). Designed for integration into OEM instrumentation and automated systems, the FP1.7 delivers stable performance across variable backpressure up to 6 bar (rel.) and suction lift up to 2 mWg—making it suitable for applications requiring accurate metering, dosing, or continuous circulation where sterility, chemical compatibility, and long-term repeatability are critical.
Key Features
- Low-pulsation fluid delivery optimized for sensitive detection systems and microfluidic interfaces
- FDA-compliant wetted materials: PTFE and EPDM diaphragms; FFKM and EPDM valves; polyphenylsulfone (PPS) pump head
- Maintenance-free operation with dry-run capability and self-priming function (up to 2 mWg)
- Digitally adjustable motor speed for fine-tuned flow control without external regulators
- Ultra-low power consumption (2 W nominal) and acoustic emission <45 dB(A) at 1 m distance
- Compact footprint (150 g total mass) with integrated mounting options for space-constrained instrument design
- Robust electromagnetic coupling eliminates shaft seals and reduces mechanical wear
Sample Compatibility & Compliance
The FP1.7 is validated for use with a broad spectrum of liquids ranging from deionized water and aqueous buffers to concentrated HCl, NaOH, IPA, and peroxide-based disinfectants. Its chemically inert wetted path ensures no leachables or extractables that could compromise assay integrity—particularly relevant for ICH Q5/Q6-compliant bioprocessing, USP pharmaceutical packaging testing, and CLSI EP17-A2 trace contaminant analysis. All standard material configurations meet FDA 21 CFR §177.2600 for indirect food contact and ISO 10993-5 cytotoxicity requirements. The pump is not intended for explosive or highly viscous media (>100 mPa·s at 20°C) and requires external filtration for particulate-laden streams to preserve diaphragm longevity.
Software & Data Management
While the FP1.7 operates as a standalone analog or PWM-controlled device, it is fully compatible with KNF’s optional digital interface modules (e.g., KNF SmartDrive™), enabling RS-485 Modbus RTU or CAN bus integration into centralized lab automation platforms. When paired with compliant controllers, full audit trail functionality—including runtime logging, speed setpoint history, and fault event timestamps—can be configured to satisfy GLP and GMP documentation requirements per 21 CFR Part 11. Firmware updates and parameter calibration are performed via KNF’s certified engineering software suite, which supports version-controlled configuration backups and secure user access levels.
Applications
- Reagent delivery and waste aspiration in clinical analyzers and immunoassay platforms
- Continuous sampling and dilution in online emission monitoring systems (CEMS) compliant with EN 15267 and EPA Method 6C
- Precision metering of etchants and developers in semiconductor wafer cleaning tools
- Fluidic actuation in point-of-care diagnostic cartridges and microfluidic organ-on-chip devices
- Cleaning solution circulation in CIP/SIP systems for bioreactor skids and filling lines
- Fuel and oxidizer dosing in PEM fuel cell test stations operating under ISO 14687 specifications
FAQ
Is the FP1.7 certified for use in Class II medical devices?
Yes—when specified with FFKM valves and PTFE diaphragms, the FP1.7 meets ISO 13485 manufacturing controls and supports design history file (DHF) documentation for Class IIa/IIb device integration.
Can it handle abrasive slurries?
No—the FP1.7 is not designed for suspended solids exceeding 50 µm particle size; inline filtration to ≤25 µm is mandatory to prevent diaphragm abrasion.
What is the expected service life under continuous operation?
Rated for ≥20,000 hours MTBF when operated within specified pressure, temperature, and duty cycle limits (duty cycle ≤80% at max pressure).
Does KNF provide application-specific validation support?
Yes—KNF’s Application Engineering team offers protocol development, compatibility testing, and IQ/OQ documentation packages aligned with ISO/IEC 17025-accredited laboratories.
