KNF N035.1.2AN.18 Dual-Head Diaphragm Vacuum & Pressure Pump

Overview

The KNF N035.1.2AN.18 is a dual-head, oil-free diaphragm pump engineered for precise, reliable vacuum generation and positive pressure delivery in demanding laboratory environments. Based on KNF’s proprietary multi-stage diaphragm actuation system, it operates without lubricants—eliminating risk of oil contamination, hydrocarbon carryover, or maintenance-related downtime. Its dual-head architecture enables simultaneous or independent vacuum and pressure operation, making it suitable for applications requiring both suction (e.g., filtration, degassing, vacuum drying) and controlled pressurization (e.g., reactor headspace pressurization, gas transfer, sterile filtration). The pump achieves a base vacuum of ≤100 mbar(abs) and delivers up to 4 bar(g) pressure at rated flow, with a maximum free-air flow rate of 55 L/min. Designed for continuous duty under variable load conditions, it features thermally stable motor windings, reinforced elastomeric diaphragms, and corrosion-resistant wetted-path components—including stainless steel (SUS316) valves and aluminum alloy housing.

Key Features

• Dual-head configuration enables true vacuum–pressure duality: one head optimized for high-flow vacuum, the other for stable pressure output—no mechanical switching required.
• Oil-free operation ensures Class 1 clean air/gas handling per ISO 8573-1:2010; certified for use with aggressive vapors including low-concentration organic solvents, diluted acids, and alkaline gases (when equipped with PTFE-coated diaphragms and valves).
• Robust construction: anodized aluminum housing, stainless steel (SUS316) valve plates, and chemically resistant EPDM or PTFE-composite diaphragms ensure long service life in corrosive or humid environments.
• Low vibration (<0.5 mm/s RMS) and acoustic noise ≤52 dB(A) at 1 m distance—designed for integration into sensitive analytical workstations or laminar flow hoods without interference.
• Integrated thermal protection and current monitoring circuitry provide automatic shutdown under overload, stall, or ambient overtemperature conditions—supporting GLP-compliant instrument qualification protocols.
• Optional IP44 enclosure rating available for enhanced protection against dust ingress and water splashing, meeting IEC 60529 requirements for semi-industrial lab settings.

Sample Compatibility & Compliance

The N035.1.2AN.18 is validated for use with non-explosive, non-particulate gas streams containing trace condensables or low-volatility vapors. When configured with PTFE-coated diaphragms and SUS316 valves (model suffix “.AT”), it complies with ASTM D471 for elastomer resistance to laboratory chemicals and meets material compatibility guidelines outlined in USP Analytical Instrument Qualification. It supports IQ/OQ documentation packages aligned with FDA 21 CFR Part 11 requirements for electronic records and signatures when integrated with compliant SCADA or LIMS systems. All electrical components conform to EN 61000-6-3 (EMC emission) and EN 61000-6-2 (immunity), and the pump carries CE marking under the EU Machinery Directive 2006/42/EC and Low Voltage Directive 2014/35/EU.

Software & Data Management

While the N035.1.2AN.18 operates as a standalone analog device, its 0–10 VDC analog input/output interface allows seamless integration into programmable logic controller (PLC) networks or centralized lab automation platforms (e.g., LabVIEW, DeltaV, or Siemens S7). Optional KNF SmartControl module provides real-time monitoring of motor current, temperature, and runtime hours—enabling predictive maintenance scheduling and audit-ready usage logs. All operational data can be timestamped and exported in CSV format, supporting ISO/IEC 17025 traceability requirements for calibration and performance verification records.

Applications

• Vacuum-assisted filtration across Buchner funnels, sintered glass filters, or membrane filter holders—especially where solvent compatibility or sterility is critical.
• Controlled pressurization of jacketed reactors, bioreactors, or fermentation vessels during sparging, headspace purging, or transfer of shear-sensitive media.
• Gas supply for GC carrier gas standby loops, FTIR purge lines, or glovebox inerting systems requiring dry, oil-free flow.
• Replacement for water aspirators or recirculating chillers in chemistry labs—reducing water consumption, wastewater generation, and freeze-risk infrastructure.
• Integration into custom-built analytical systems requiring synchronized vacuum hold and pressure ramp sequences (e.g., accelerated solvent extraction, vacuum concentration modules).

FAQ

Can this pump handle saturated solvent vapors such as acetone or ethanol?
Yes—when specified with PTFE-coated diaphragms and SUS316 valves (N035.1.2AT.18), it is rated for intermittent exposure to saturated vapors of common polar organics below their autoignition temperature and within defined concentration limits per ATEX Category 3G (non-certified for Zone 0/1).

Is the pump suitable for continuous 24/7 operation?
It is rated for continuous duty at ≤80% of max. pressure/vacuum load; full-load continuous operation requires active cooling and periodic inspection per KNF Maintenance Schedule M-035.1.2.

Does KNF provide factory calibration certificates?
Yes—each unit ships with a traceable performance test report (vacuum level, pressure output, flow rate at reference points) signed by KNF’s DIN EN ISO/IEC 17025-accredited calibration lab in Freiburg, Germany.

Can the pump be mounted vertically or inverted?
Mounting orientation must follow KNF Installation Manual IM-N035.1.2: horizontal mounting is mandatory to ensure proper diaphragm flexure geometry and valve seating integrity; vertical or inverted installation voids warranty and compromises lifetime.