KNF N813.4 ANDC B Brushless DC Diaphragm Vacuum Pump
| Brand | KNF |
|---|---|
| Origin | Germany |
| Pump Type | Oil-Free Diaphragm Vacuum Pump |
| Model | N813.4 ANDC B |
| Ultimate Vacuum | 0.5 mbar (abs.) |
| Pumping Speed | 13 L/min |
| Dimensions (W×D×H) | 144 × 141 × 107 mm |
| Weight | 3.8 kg |
| Motor Power | 65 W |
| Motor Type | Brushless DC |
Overview
The KNF N813.4 ANDC B is a compact, oil-free diaphragm vacuum pump engineered for integration into analytical instrumentation and laboratory systems requiring reliable, maintenance-free vacuum generation. Designed as an OEM-grade solution, it operates on brushless DC motor technology—delivering stable rotational speed control, extended service life, and immunity to voltage fluctuations common in lab environments. Its core principle relies on reciprocating PTFE-coated diaphragms driven by an eccentric mechanism, enabling continuous gas displacement without lubricants or hydrocarbon contamination. With an ultimate vacuum of 0.5 mbar (abs.) and a nominal pumping speed of 13 L/min at atmospheric pressure, the N813.4 ANDC B is optimized for applications demanding clean, repeatable vacuum performance—particularly as a forepump for turbomolecular pumps or as a primary vacuum source for spectrometers, mass spectrometers, and residual gas analyzers.
Key Features
- Oil-free operation ensures zero hydrocarbon backstreaming—critical for high-purity vacuum environments in mass spectrometry and surface analysis.
- Brushless DC motor provides precise speed regulation, low electromagnetic interference (EMI), and consistent torque across operating temperatures (5–40 °C ambient).
- Compact footprint (144 × 141 × 107 mm) and lightweight design (3.8 kg) facilitate seamless integration into space-constrained instrument enclosures.
- Robust diaphragm assembly with chemically resistant PTFE and EPDM elastomers enables compatibility with mildly aggressive vapors commonly encountered in GC-MS sample introduction or vacuum drying stages.
- No routine maintenance required: no oil changes, valve replacements, or lubrication intervals—aligned with ISO 9001-certified manufacturing and GLP-compliant operational protocols.
Sample Compatibility & Compliance
The N813.4 ANDC B is rated for continuous duty with non-condensable, dry, non-corrosive gases. It is not intended for pumping solvents, acids, or particulate-laden streams without upstream filtration or cold traps. KNF validates performance per DIN EN ISO 21507 for vacuum pump safety and IEC 61000-6-3 for electromagnetic compatibility. As an OEM component, it supports system-level compliance with FDA 21 CFR Part 11 when integrated into validated instruments (e.g., clinical analyzers or regulated QC platforms), provided the host system implements appropriate audit trail and electronic signature controls. CE marking confirms conformity with EU Machinery Directive 2006/42/EC and Low Voltage Directive 2014/35/EU.
Software & Data Management
While the N813.4 ANDC B operates as a standalone analog device (0–10 VDC speed control input, optional digital interface via KNF’s proprietary CANopen module), its performance characteristics are fully documented in KNF’s engineering datasheets and integration guides—including flow vs. pressure curves, power consumption profiles, and thermal derating tables. For system integrators, KNF provides comprehensive mechanical mounting templates, electrical pinouts, and EMC test reports to support regulatory submissions (e.g., IEC 62304 for medical devices). Real-time monitoring of motor current and temperature can be implemented externally using standard industrial sensors, enabling predictive maintenance logic within host instrument firmware.
Applications
- Forevacuum supply for turbomolecular pumps in high-vacuum systems (e.g., electron microscopes, thin-film deposition chambers).
- Vacuum source for optical emission spectrometers (OES), inductively coupled plasma (ICP) interfaces, and Fourier-transform infrared (FTIR) sampling cells.
- Sample handling vacuum in automated liquid handlers, solid-phase extraction (SPE) workstations, and vacuum-assisted filtration modules.
- Pressure control in environmental test chambers and accelerated stability testing equipment compliant with ICH Q1 guidelines.
- OEM integration into portable gas analyzers, breath alcohol testers, and field-deployable air quality monitors requiring silent, low-power vacuum generation.
FAQ
Can the N813.4 ANDC B be used with corrosive gases such as HCl or Cl₂?
No. It is designed for dry, non-corrosive gases only. Exposure to acidic, oxidizing, or condensable vapors will degrade diaphragm materials and void warranty. Use with appropriate chemical scrubbers or inert carrier gas dilution is mandatory.
Does this pump meet UL or CSA safety certification for North American installations?
The base N813.4 ANDC B model carries CE marking but not UL/CSA. KNF offers UL-listed variants (e.g., N813.4 ANDC B-UL) upon request—contact KNF technical sales for certified configurations.
What is the expected service life under continuous operation?
Rated for ≥20,000 hours MTBF at 25 °C ambient and 80% duty cycle, based on accelerated life testing per ISO 13374. Actual longevity depends on inlet gas cleanliness and thermal management within the host system.
Is speed feedback or rotational speed monitoring available?
Standard analog control lacks built-in tachometer output. However, KNF’s optional CANopen interface (N813.4 ANDC B-CAN) provides real-time RPM, motor temperature, and fault status via standardized object dictionary entries.
How does ambient temperature affect ultimate vacuum performance?
Ultimate vacuum degrades linearly above 35 °C ambient due to reduced diaphragm elasticity and increased internal leakage. Derating curves are provided in KNF Application Note AN-027 for thermal design guidance.
