ChemTron SXD Series Corrosion-Resistant Diaphragm Vacuum Pump

Overview

The ChemTron SXD Series Corrosion-Resistant Diaphragm Vacuum Pump is an engineered solution for continuous, oil-free vacuum generation in chemically aggressive environments. Based on positive displacement via PTFE-coated multi-layer elastomeric diaphragms and chemically inert valve assemblies, the SXD series operates without lubricating oils—eliminating risk of process contamination and enabling safe handling of acidic vapors (e.g., HCl, HF, SO₂), halogenated solvents, and oxidizing gases commonly encountered in chemical synthesis, pharmaceutical lyophilization, and petrochemical sampling. Unlike rotary vane or scroll pumps, the diaphragm architecture ensures zero hydrocarbon backstreaming and intrinsic resistance to condensable vapors. The SXD.2000T model delivers a maximum pumping speed of 170 L/min at inlet, with ultimate vacuum performance down to 2 mbar (absolute), making it suitable for medium-vacuum applications including vacuum filtration, solvent evaporation, degassing of reactive slurries, and vacuum drying of moisture-sensitive APIs.

Key Features

• Triple-layer PTFE-reinforced diaphragms with stainless steel backing plates for extended service life under cyclic stress and chemical exposure
• Chemically resistant wetted materials: PTFE, FPM (Viton®), EPDM, and 316L stainless steel—validated per ASTM D471 for immersion in 30% HNO₃, 10% NaOH, and acetone
• Integrated thermal overload protection and automatic restart delay to prevent motor damage during intermittent high-load operation
• Low-vibration, brushless DC motor drive ensuring stable vacuum output across variable inlet pressures (1000–2 mbar)
• Modular design enables field-replacement of diaphragm kits, valves, and mufflers without specialized tools or calibration recalibration
• No exhaust filtration required for standard corrosive gas loads; optional acid-gas scrubber module available for HF/HCl-laden streams

Sample Compatibility & Compliance

The SXD series is explicitly designed for non-explosive, non-particulate-laden gas streams. It is incompatible with solvent vapors that polymerize upon condensation (e.g., styrene, acrylates) or with abrasive particulates exceeding 5 µm without upstream cyclonic or sintered metal pre-filtration. All models comply with EU Machinery Directive 2006/42/EC and Electromagnetic Compatibility Directive 2014/30/EU. Electrical safety certification includes EN 61000-6-2 (immunity) and EN 61000-6-4 (emissions). The pump housing meets IP54 ingress protection rating. Documentation packages support GLP/GMP environments, including factory-as-tested performance certificates traceable to PTB (Physikalisch-Technische Bundesanstalt) standards.

Software & Data Management

While the SXD series operates as a standalone analog-controlled pump, optional digital interface modules (SXD-DI Kit) provide 0–10 V analog input for remote vacuum setpoint control and 4–20 mA output for real-time flow rate monitoring. Integrated RS-485 Modbus RTU protocol enables integration into LabVantage, DeltaV, or Siemens Desigo CCMS platforms. Audit trail logs—including runtime hours, thermal event count, and overpressure occurrences—are stored in non-volatile memory and exportable via USB-C for FDA 21 CFR Part 11-compliant review. Firmware updates are performed via signed binary upload to ensure integrity verification.

Applications

• Vacuum-assisted crystallization and distillation in fine chemical pilot plants
• Lyophilizer primary condenser evacuation in sterile API manufacturing suites
• In-line vacuum sampling for online GC-MS analysis of refinery off-gas streams
• Evacuation of gloveboxes containing SO₂ or Cl₂ atmospheres during battery electrolyte R&D
• High-throughput solid-phase extraction (SPE) manifolds in environmental testing labs (EPA Method 502.2, 525.3)
• Deposition chamber roughing in thin-film coating lines using TMA or TiCl₄ precursors

FAQ

Can the SXD pump handle hydrogen chloride (HCl) vapor continuously?
Yes—provided inlet concentration remains below 1000 ppm and temperature does not exceed 40 °C. A dedicated PTFE/FPM valve kit and optional inline water trap are recommended for >500 ppm HCl loads.
Is calibration required before first use?
No. Each unit undergoes factory verification of ultimate vacuum and flow rate against NIST-traceable reference instruments; calibration certificate is included.
What maintenance intervals are specified under continuous 24/7 operation?
Diaphragm replacement every 6,000 operating hours; valve assembly inspection every 3,000 hours; muffler cleaning every 500 hours in high-condensate environments.
Does the SXD.2000T support vacuum level feedback control?
Yes—when equipped with the SXD-DI Kit and paired with a compatible capacitance manometer (e.g., MKS Baratron 627B), closed-loop pressure regulation within ±0.1 mbar is achievable.
Are spare parts available globally with documented lead times?
All critical spares—including diaphragm kits (CR.5002.DK), inlet filters (CR.5003.FIL), and motor assemblies (CR.5004.MTR)—are stocked in ChemTron’s regional distribution hubs in Rotterdam, Chicago, and Singapore, with standard lead time of 3–5 business days.