ChemTron SXD Series Corrosion-Resistant Diaphragm Vacuum Pump

Overview

The ChemTron SXD Series Corrosion-Resistant Diaphragm Vacuum Pump is an engineered solution for laboratories handling aggressive, corrosive vapors and gases—common in chemical synthesis, pharmaceutical process development, and petrochemical analysis. Unlike conventional oil-lubricated or non-chemically resistant diaphragm pumps, the SXD series features fully fluoropolymer-wetted components—including diaphragms, valves, and internal chamber surfaces—constructed from high-purity polytetrafluoroethylene (PTFE) and perfluoroelastomer (FFKM). This material architecture ensures long-term integrity under exposure to halogenated solvents (e.g., chloroform, DCM), strong acids (e.g., HCl, HNO₃ fumes), bases (e.g., concentrated NaOH vapor), and oxidizing agents (e.g., hydrogen peroxide, ozone). The pump operates on a dry, oil-free positive displacement principle: a motor-driven eccentric mechanism oscillates a PTFE-reinforced elastomeric diaphragm, generating vacuum through cyclic expansion and compression of the sealed chamber. With ultimate vacuum performance down to 2 mbar (absolute) and maximum flow rates up to 34 L/min, the SXD platform delivers stable, pulse-dampened suction ideal for sensitive vacuum-dependent processes where contamination, outgassing, or chemical degradation must be rigorously excluded.

Key Features

• Fully fluorinated wetted path: PTFE diaphragm, FFKM check valves, and PTFE-coated housing internals eliminate metal contact and resist chemical attack across pH 0–14 and common organic/aqueous solvent systems.
• Three scalable models (SXD.3, SXD.4, SXD.6): Optimized for varying duty cycles—from low-power benchtop filtration (SXD.3, 95 W) to continuous-duty rotary evaporation and vacuum concentration (SXD.4/SXD.6, 245 W).
• Integrated thermal protection and overload cutoff: Prevents motor damage during extended operation or inlet blockage events, supporting unattended overnight runs.
• Low-vibration, brushless DC motor design: Ensures mechanical stability on analytical balances and optical tables; acoustic noise <52 dB(A) at 1 m distance.
• Modular service architecture: Diaphragm kits, valve assemblies, and filter elements are field-replaceable without specialized tools—reducing mean time to repair (MTTR) and extending service life beyond 15,000 operating hours.

Sample Compatibility & Compliance

The SXD series is validated for use with volatile, reactive, and condensable vapors encountered in regulated laboratory workflows. It complies with IEC 61000-6-3 (EMC emissions) and IEC 61000-6-2 (immunity), and meets CE marking requirements for safety (2014/35/EU Low Voltage Directive). While not intrinsically safe for Zone 1 hazardous areas, its oil-free, spark-free operation makes it suitable for Class I, Division 2 environments when installed per NEC Article 500 guidelines. The pump supports GLP and GMP-aligned documentation: each unit ships with a Factory Calibration Certificate traceable to PTB (Physikalisch-Technische Bundesanstalt), and optional IQ/OQ protocols are available for installation and operational qualification. All wetted materials conform to USP Class VI and FDA 21 CFR §177.1550 (fluoropolymer food-contact compliance), supporting applications in API purification and excipient handling.

Software & Data Management

The SXD series operates as a standalone analog device—no embedded firmware or digital interface is included, by design. This architecture eliminates software validation overhead, cybersecurity vulnerabilities, and firmware obsolescence risks commonly associated with “smart” lab pumps. Vacuum level and flow stability are monitored externally via calibrated pressure transducers (e.g., MKS Baratron) or flow meters connected downstream. For laboratories requiring audit-ready records, integration with third-party LabVantage, Thermo Fisher SampleManager, or custom SCADA systems is achieved using 0–10 V analog output signals (optional add-on module) or dry-contact status relays for run/fault indication. All calibration data, maintenance logs, and usage history remain under full user control—no cloud dependency or vendor-hosted telemetry.

Applications

• Vacuum filtration of acidic or basic slurries in inorganic synthesis and catalyst recovery.
• Rotary evaporation of chlorinated or fluorinated solvents under controlled sub-atmospheric conditions.
• Reduced-pressure distillation of thermally labile natural products without thermal decomposition.
• Centrifugal vacuum concentration of protein digests and oligonucleotide samples in proteomics and genomics workflows.
• Solid-phase extraction (SPE) manifolds processing environmental water samples containing heavy metals or organohalides.
• Gas scavenging in Schlenk-line auxiliary systems and glovebox antechambers.

FAQ

Is the SXD pump compatible with hydrofluoric acid (HF) vapor?
Yes—when equipped with FFKM (not standard EPDM or Viton) valves and operated below 60 °C, the SXD series maintains structural integrity against anhydrous HF and dilute aqueous HF up to 48 wt%, per ASTM D471 testing.
Can it be used for vacuum oven drying of lithium battery electrode slurries?
Yes—the absence of hydrocarbon lubricants prevents cross-contamination of NMC or LFP cathode materials; PTFE surfaces also minimize metal ion leaching during prolonged 80 °C operation.
What is the recommended maintenance interval under continuous 8-hour/day operation?
Diaphragm replacement every 6,000 hours (≈18 months); valve set replacement every 12,000 hours; inlet particulate filter cleaned weekly or after each corrosive sample batch.
Does ChemTron provide 21 CFR Part 11-compliant electronic records for pump operation?
No—the SXD is intentionally analog-only; however, when integrated with validated third-party data acquisition systems, full Part 11 compliance—including audit trails, electronic signatures, and record retention—is achievable per customer’s system validation scope.
Are spare parts available globally with documented traceability?
Yes—original ChemTron OEM spares (diaphragm kits CR.5002.01, FFKM valve sets CR.5003.02, and PTFE inlet filters CR.5004.05) ship with CoA, material certifications, and batch-specific test reports aligned with ISO 9001:2015.