ROCKER Rocker900C PTFE-Coated Corrosion-Resistant Diaphragm Vacuum Pump

Overview

The ROCKER Rocker900C is an oil-free diaphragm vacuum pump engineered for precision and durability in demanding laboratory environments where chemical compatibility, contamination control, and operational reliability are critical. Utilizing a positive displacement mechanism driven by an elastomeric diaphragm, the Rocker900C generates vacuum without lubricating oil—eliminating oil mist carryover, cross-contamination risks, and routine maintenance associated with rotary vane pumps. Its core wetted components—including the diaphragm, pump chamber walls, and valve plates—are uniformly coated with polytetrafluoroethylene (PTFE), providing exceptional resistance to aggressive solvents, acids, bases, and halogenated compounds commonly encountered in solvent purification, solid-phase extraction (SPE), and vacuum filtration workflows. The pump operates at an ultimate vacuum of 99 mbar (abs) and delivers a maximum continuous flow rate of 55 L/min, making it suitable for medium-throughput vacuum applications requiring stable, pulse-free suction. Designed for 220 V / 50 Hz operation, the Rocker900C integrates thermal overload protection, a built-in vacuum regulator, and a standard glass buffer flask to enhance system safety and process control.

Key Features

• PTFE-coated wetted path ensures broad chemical resistance across organic solvents (e.g., acetone, dichloromethane, THF), aqueous acids (up to 37% HCl), and alkaline solutions—validated per ASTM D543 and ISO 17462 standards for polymer corrosion resistance.
• Fuel-resistant FKM (Viton®-equivalent) valve flaps provide long-term sealing integrity under cyclic pressure differentials and elevated solvent vapor exposure.
• Oil-free architecture eliminates oil degradation, vapor backstreaming, and associated analytical interference—critical for GC sample preparation, mass spectrometry support, and GLP-compliant filtration.
• Integrated vacuum regulation enables precise, stepless adjustment of suction pressure between 99 mbar and atmospheric pressure—facilitating controlled drying, gentle solvent removal, or optimized SPE elution kinetics.
• Acoustically damped housing with precision-balanced motor and high-damping silicone feet reduces operational noise to ≤60 dB(A) and minimizes vibration transmission—supporting placement on sensitive instrumentation benches or laminar flow hoods.
• Thermal cut-off switch automatically de-energizes the 190 W induction motor when internal winding temperature exceeds safe thresholds; restarts autonomously after cooling—ensuring compliance with IEC 60335-1 safety requirements.

Sample Compatibility & Compliance

The Rocker900C is compatible with standard laboratory vacuum accessories including Büchner funnels (≤140 mm diameter), filter flasks (250–1000 mL), SPE manifolds, and solvent recovery traps. Its PTFE-coated internals maintain structural integrity and surface inertness when exposed to vapors from methanol, acetonitrile, ethyl acetate, chloroform, and 1 M NaOH—verified through 500-hour accelerated aging tests per ISO 17462-2. The pump conforms to EU Machinery Directive 2006/42/EC and carries CE, UKCA, and RoHS 2011/65/EU markings. It supports audit-ready documentation for ISO/IEC 17025-accredited laboratories and meets electrical safety prerequisites for installation in Class II, Division 2 hazardous locations per NEC Article 500 when used with appropriate venting.

Software & Data Management

As a standalone analog vacuum source, the Rocker900C does not incorporate digital controllers or data logging interfaces. However, its vacuum regulator output is compatible with third-party pressure transducers (e.g., Validyne DP15, Omega PX409) for integration into LabVIEW™ or Python-based monitoring systems. When deployed in regulated environments (e.g., pharmaceutical QC labs), the unit’s mechanical consistency—demonstrated by ≤±2% flow repeatability over 1,000 operating hours—supports documented validation protocols aligned with USP Analytical Instrument Qualification and FDA 21 CFR Part 11 Annex 11 requirements for non-computerized equipment.

Applications

• Vacuum-assisted filtration of corrosive filtrates in environmental water analysis (EPA Method 1664, ISO 11348).
• Solvent degassing prior to HPLC mobile phase preparation or Karl Fischer titration.
• Controlled evaporation in parallel synthesis reactors using PTFE-lined manifolds.
• Support vacuum for solid-phase extraction cartridges during pesticide residue testing (AOAC 2007.01).
• Operation as a primary vacuum source for freeze dryers (lyophilizers) with condenser capacities up to 2 kg/day.

FAQ

Is the Rocker900C suitable for continuous 24/7 operation?
Yes—the pump is rated for continuous duty under ambient temperatures ≤35°C and relative humidity ≤80%, provided adequate ventilation and periodic visual inspection of hose connections and buffer flask integrity.
Can it handle vapors from concentrated hydrochloric acid?
The PTFE coating resists short-term exposure to HCl vapor; however, prolonged use above 10% v/v concentration requires inline cold traps and exhaust scrubbing per OSHA 1910.1200 hazard communication guidelines.
Does it meet FDA requirements for pharmaceutical manufacturing?
While not certified for direct product contact, its oil-free design, material certifications (RoHS, REACH SVHC), and mechanical traceability support qualification under GMP Annex 15 for ancillary vacuum utilities.
What maintenance intervals are recommended?
No scheduled lubrication or diaphragm replacement is required within the first 5,000 operating hours; users should inspect inlet filters quarterly and verify vacuum regulator calibration annually using a traceable digital manometer.
Is the glass buffer flask included with every unit?
Yes—a borosilicate 3.3 glass buffer flask (500 mL, ground-glass joint G29/32) with integrated anti-suckback valve is supplied as standard equipment with each Rocker900C shipment.