KNF N96 Corrosion-Resistant Diaphragm Vacuum Pump

Overview

The KNF N96 Corrosion-Resistant Diaphragm Vacuum Pump is an oil-free, compact laboratory vacuum solution engineered for precision, chemical resilience, and operational flexibility in demanding analytical and preparative workflows. Utilizing a dual-head diaphragm displacement mechanism with PTFE-coated elastomeric membranes and FKM valves, the N96 achieves reliable vacuum generation without lubricants—eliminating risk of sample contamination or hydrocarbon backstreaming. Its PPS (polyphenylsulfone) pump head provides exceptional resistance to aggressive solvents, acids, and bases, enabling safe operation with common laboratory media including acetone, methanol, HCl vapors, and ethyl acetate. Designed to meet the mechanical and regulatory expectations of modern ISO/IEC 17025-compliant laboratories, the N96 delivers stable suction performance across variable load conditions while maintaining low vibration and acoustic emission (<45 dB(A))—critical for integration near sensitive instrumentation such as mass spectrometers, freeze dryers, or rotary evaporators.

Key Features

• Chemical-resistant construction: PPS pump head, PTFE-coated diaphragms, and FKM valve assemblies ensure long-term durability when handling corrosive or reactive vapors.
• Manual speed control via integrated rotary knob enables real-time adjustment of flow rate (0–6.6 L/min) to match process requirements—ideal for solvent evaporation, filtration, or degassing where gentle vacuum is essential.
• ATEX-certified (IIA, T4) for safe use in potentially explosive atmospheres; suitable for vacuum applications involving flammable solvents or volatile organic compounds.
• Compact footprint (75 × 119 × 156 mm) and foldable handle optimize space utilization in crowded fume hoods or benchtop setups; weight of only 1.3 kg facilitates repositioning without structural support.
• Integrated gas ballast (vent valve) minimizes condensate accumulation during high-boiling-point solvent removal, extending diaphragm service life and improving cycle reproducibility.
• Three-color LED status indicator (green = standby, blue = running, red = fault) provides immediate visual feedback on operational state—supporting GLP-compliant documentation protocols.

Sample Compatibility & Compliance

The N96 is validated for continuous duty with non-condensable gases and low-to-moderate vapor loads typical in chemistry, pharmaceutical, and environmental labs. It complies with EN 60079-0 (explosive atmospheres), EN 61000-6-3 (EMC emissions), and RoHS 2011/65/EU. While not intrinsically safe for Zone 0/1 installations without additional barriers, its ATEX marking permits use in Zone 2 environments per Directive 2014/34/EU. The pump meets ISO 8573-1 Class 0 air purity requirements for oil-free operation and is compatible with USP analytical instrument qualification frameworks. All wetted materials are documented per FDA 21 CFR 177.2470 (PTFE) and 177.2600 (FKM), supporting GMP-aligned validation packages.

Software & Data Management

The N96 operates as a standalone unit but integrates seamlessly with KNF’s VC 900 Digital Speed Controller—a microprocessor-based interface supporting analog (0–10 V) and digital (RS-485 Modbus RTU) communication. When paired, the system enables programmable ramp profiles, remote start/stop, real-time flow monitoring, and audit-trail logging compliant with FDA 21 CFR Part 11 requirements (when deployed on validated IT infrastructure). No proprietary software installation is required; configuration occurs via intuitive front-panel navigation or optional web-based dashboard. Internal memory retains up to 100 event logs—including overtemperature alerts, power interruptions, and runtime hours—for maintenance scheduling and regulatory review.

Applications

• Routine vacuum filtration of aqueous and organic filtrates in QC/QA labs.
• Rotary evaporation support with controlled vacuum ramping to prevent bumping during concentration of heat-sensitive APIs.
• Sample preparation for GC-MS and LC-MS systems requiring particle- and oil-free vacuum sources.
• Desiccator evacuation and glove box purging in synthetic chemistry workflows.
• Environmental testing chambers where trace hydrocarbon interference must be avoided.
• Academic teaching labs requiring robust, low-maintenance vacuum sources for undergraduate experiments.

FAQ

Can the N96 be used with aggressive solvents like concentrated nitric acid vapors?
Yes—the PPS pump head and PTFE/FKM wetted components provide verified resistance to strong oxidizers under intermittent exposure at ≤40 °C; continuous duty requires vapor condensation upstream.
Is the pump suitable for continuous 24/7 operation?
It is rated for S1 continuous duty per IEC 60034-1; however, ambient temperature must remain within 5–40 °C, and inlet gas load should not exceed 30% saturation to maintain thermal stability.
Does the N96 require periodic oil changes or membrane replacements?
No oil maintenance is needed; diaphragms are rated for ≥10,000 operating hours under nominal load—replacement intervals depend on chemical exposure profile and are tracked via VC 900 log data.
Can it be integrated into automated vacuum control systems?
Yes—via 0–10 V analog input or RS-485 Modbus RTU, enabling synchronization with PLCs, LIMS, or SCADA platforms for centralized lab equipment management.
What accessories are available for vapor protection?
KNF offers certified cold traps (NCT series), inline protective bottles (NPB series), and HEPA-filtered exhaust kits—all designed for tool-less mounting and pressure-drop optimized flow paths.