ROCKER Chemker 410 Corrosion-Resistant Diaphragm Vacuum Pump

Overview

The ROCKER Chemker 410 is an oil-free, corrosion-resistant diaphragm vacuum pump engineered for reliable and contamination-free operation in demanding laboratory environments. Utilizing a positive displacement mechanism driven by an elastomeric diaphragm actuated via eccentric shaft motion, the Chemker 410 generates vacuum without lubricating oil—eliminating oil carryover, vapor backstreaming, or hydrocarbon contamination. Its core design prioritizes chemical compatibility: all gas-path components—including diaphragms, valves, and chamber housings—are constructed from polytetrafluoroethylene (PTFE), providing broad resistance to organic solvents, mineral acids, alkalis, and halogenated vapors. This makes the Chemker 410 particularly suitable for applications involving aggressive process gases where conventional oil-sealed or non-PTFE pumps would degrade rapidly or compromise sample integrity.

Key Features

• Full PTFE-wetted path: All surfaces in contact with pumped gas—including diaphragm, inlet/outlet valves, and internal chamber—are fabricated from virgin PTFE, ensuring long-term stability under corrosive exposure.
• Oil-free operation: No lubrication required; eliminates maintenance intervals associated with oil replenishment, filtration, or replacement—reducing total cost of ownership and downtime.
• Integrated thermal protection: A bimetallic temperature switch embedded in the motor windings automatically interrupts power when internal temperature exceeds safe operating limits, then resumes operation upon cooling—enhancing system longevity and safety compliance.
• Low-noise, low-vibration architecture: Direct-coupled motor-to-crankshaft drive and optimized diaphragm stroke geometry limit operational noise to ≤52 dB(A) and minimize mechanical resonance, supporting use in shared lab spaces or sensitive instrumentation setups.
• CE-certified safety compliance: Fully conforms to EU Machinery Directive 2006/42/EC and Low Voltage Directive 2014/35/EU, with documented risk assessment and EMC testing per EN 61326-1.

Sample Compatibility & Compliance

The Chemker 410 is validated for continuous duty with vapors generated during common analytical and preparative workflows—including acetic acid, hydrochloric acid (up to 37%), sodium hydroxide solutions, acetone, dichloromethane, and ethanol. While not rated for explosive atmospheres (ATEX), its non-sparking PTFE components and absence of ignition sources make it appropriate for Class I, Division 2 environments when installed per NEC Article 500 guidelines. The pump meets general requirements for GLP-compliant laboratories where equipment qualification (IQ/OQ) must demonstrate consistent vacuum delivery and material compatibility. It supports trace-level analysis workflows where hydrocarbon interference must be excluded—such as EPA Method 502.2 (purge-and-trap GC/MS) or ASTM D4052 density determination requiring inert vacuum lines.

Software & Data Management

The Chemker 410 operates as a standalone analog device with no embedded firmware, digital interface, or data logging capability. This design philosophy emphasizes robustness, electromagnetic immunity, and regulatory transparency—particularly relevant in FDA-regulated environments where software validation (per 21 CFR Part 11) would otherwise impose qualification overhead. Users integrate the pump into larger systems via standard vacuum tubing (8 mm ID) and optional accessories such as the ROCKER Chemker Pressure Control Valve (Model PCV-400), enabling manual regulation of suction pressure between 10 mbar and atmospheric. For automated pressure control, third-party vacuum controllers with 0–10 V or 4–20 mA analog input can be interfaced externally using compatible solenoid valves.

Applications

• Vacuum-assisted filtration of aggressive filtrates in environmental water analysis (e.g., EPA 1664B for oil and grease).
• Electrophoretic transfer (Western blotting, SDS-PAGE) where solvent-based transfer buffers require chemically inert vacuum manifolds.
• Solid-phase extraction (SPE) cartridges loaded with acidic or basic analytes—preventing degradation of silica-based sorbents or ion-exchange media.
• Solvent degassing prior to HPLC mobile phase preparation, especially for TFA-containing or high-pH eluents.
• Rotary evaporation auxiliary vacuum supply for acid-sensitive compounds (e.g., tert-butyl esters, silyl ethers).

FAQ

Is the Chemker 410 suitable for pumping hydrogen chloride (HCl) gas?
Yes—provided concentration and flow rate remain within ISO 8573-1 Class 4 particulate/moisture limits and condensation is prevented upstream. PTFE exhibits excellent resistance to anhydrous HCl; however, wet HCl may accelerate valve seat wear over extended exposure.

Can this pump be used in a cleanroom environment?
It meets ISO Class 5 particulate emission thresholds when operated with HEPA-filtered inlet air and PTFE-compatible exhaust tubing—no outgassing of plasticizers or silicone residues is observed per ASTM E1547 screening.

Does the pump include a built-in vacuum gauge?
No—vacuum level monitoring requires external analog or digital gauges (e.g., Pirani or capacitance manometers) connected via standard NPT or VCR fittings.

What is the expected service life under continuous operation?
With ambient temperatures ≤35°C and inlet gas dew point <10°C, typical diaphragm lifetime exceeds 10,000 hours; ROCKER provides a 2-year limited warranty covering materials and workmanship.