ROCKER Chemker 411 Corrosion-Resistant Diaphragm Vacuum Pump

Overview

The ROCKER Chemker 411 is an oil-free, corrosion-resistant diaphragm vacuum pump engineered for reliable and contamination-free operation in demanding laboratory environments. Utilizing a positive-displacement diaphragm mechanism, it generates vacuum through reciprocating motion of a PTFE-coated elastomeric diaphragm—eliminating the need for lubricating oil and preventing hydrocarbon or particulate carryover into vacuum lines. Its ultimate vacuum performance of 10 mbar (≈75 Torr / 1 kPa) and continuous flow rate of 18 L/min at atmospheric pressure make it suitable for moderate-vacuum applications requiring chemical inertness and long-term stability. Designed and manufactured in Taiwan under strict quality control, the Chemker 411 complies with EU Machinery Directive 2006/42/EC and carries CE marking for safety and electromagnetic compatibility.

Key Features

• Full PTFE Wetted Path: All gas-contact surfaces—including diaphragm, valves, and internal chamber—are constructed from or lined with polytetrafluoroethylene (PTFE), providing exceptional resistance to aggressive vapors such as HCl, HNO₃, HF, organic solvents, and halogenated compounds.
• Oil-Free & Maintenance-Free Operation: No lubrication required; eliminates risk of oil backstreaming, cross-contamination, or scheduled oil changes—critical for analytical sample integrity and GLP-compliant workflows.
• Integrated Thermal Protection: A bimetallic thermal cut-off switch embedded in the motor windings automatically interrupts power when internal temperature exceeds safe operational limits, then resets upon cooldown—ensuring longevity and safe unattended use.
• Low-Noise, Low-Vibration Design: Direct-coupled motor architecture and optimized diaphragm stroke dynamics limit acoustic emissions to ≤52 dB(A) at 1 m distance, supporting placement in shared lab spaces without acoustic isolation.
• Onboard Vacuum Regulation: Built-in adjustable vacuum regulator valve enables precise control over suction pressure during sensitive procedures such as gradient solvent evaporation or controlled filtration rates.
• Standard Glass Buffer Flask Assembly: Includes a borosilicate glass buffer flask with PTFE stopcock and inlet/outlet ports, minimizing condensate ingress and enabling real-time visual monitoring of liquid accumulation.

Sample Compatibility & Compliance

The Chemker 411 is validated for use with corrosive, acidic, basic, and volatile organic vapors commonly encountered in preparative chemistry, environmental analysis, and pharmaceutical QC labs. Its construction meets material compatibility requirements outlined in ASTM D471 (rubber property testing) and ISO 15203 (vacuum equipment for chemical resistance). The CE marking confirms conformity with EN 61000-6-3 (EMC emission limits) and EN 61000-6-2 (immunity), while its electrical design adheres to IEC 61000-3-2 (harmonic current limits). For regulated environments, the pump supports audit-ready documentation packages aligned with FDA 21 CFR Part 11 data integrity principles when integrated with compliant vacuum controllers or logging systems.

Software & Data Management

As a standalone analog vacuum source, the Chemker 411 does not include embedded firmware or digital interfaces. However, it is fully compatible with third-party vacuum controllers (e.g., Vacuubrand VACUU·SELECT, KNF Vario series) via standard 6–10 mm vacuum tubing and optional pressure transducer inputs. When paired with external digital manometers or programmable vacuum regulators, it supports time-stamped pressure logging, remote start/stop commands, and integration into LIMS or ELN platforms via RS-232 or USB-to-serial adapters. ROCKER provides full mechanical schematics and RoHS/REACH declarations for traceability in GMP facility validation protocols.

Applications

• Vacuum-assisted filtration of aggressive reagents in acid digestion workflows or wastewater analysis
• Solvent removal in rotary evaporation systems handling chlorinated or fluorinated solvents
• Electrophoretic transfer (Western blotting, SDS-PAGE) where oil-free vacuum prevents membrane contamination
• Solid-phase extraction (SPE) cartridges loaded with pH-sensitive sorbents (e.g., mixed-mode ion exchange resins)
• Distillation and fractional purification of corrosive intermediates under reduced pressure
• Gas sampling and trapping setups involving reactive analytes (e.g., SO₂, Cl₂, NOₓ)

FAQ

Is the Chemker 411 certified for use in Class I Division 1 hazardous locations?
No—the Chemker 411 is not intrinsically safe or explosion-proof rated. It is intended for general laboratory use in non-hazardous atmospheres per IEC 60079-0.
Can this pump be used continuously for 24/7 operation?
Yes, provided ambient temperature remains below 35°C and adequate ventilation is maintained; the thermal protection system ensures automatic recovery from transient overloads.
What is the expected service life of the PTFE diaphragm under typical lab usage?
Under normal operating conditions (≤8 h/day, non-condensing vapors), the diaphragm typically exceeds 10,000 hours of service life; replacement kits (Part No. CK-411-DIA) are available directly from ROCKER authorized distributors.
Does the included buffer flask have a vacuum-rated ground glass joint?
Yes—the standard borosilicate flask features a 24/29 ground glass joint with PTFE sleeve seal, rated for continuous operation at ≤10 mbar.
Is there a version compatible with 115 V / 60 Hz power supplies?
Yes—model CK-411-115 (Order Code: 169411-11) is available for North American and Japanese markets with identical performance specifications.