VACUUBRAND CVC 3000 Rough Vacuum Control System for Diaphragm Pumps

Overview

The VACUUBRAND CVC 3000 Rough Vacuum Control System is an engineered solution for precise, repeatable regulation of vacuum levels in laboratory and pilot-scale applications utilizing diaphragm vacuum pumps. Designed specifically for the rough vacuum range (1080 to 1 mbar), the system operates on a two-point (on/off) control principle: it monitors real-time pressure via an integrated or externally connected analog vacuum sensor (e.g., VACUUBRAND’s DIAVAC series), then actuates a solenoid valve—here the VV-B 6C—to interrupt or re-establish the vacuum path. This closed-loop architecture enables stable setpoint maintenance without continuous pump modulation, minimizing mechanical wear and extending pump service life. Unlike continuous proportional controllers, the CVC 3000 delivers robust performance in environments where high-speed response is unnecessary but long-term reliability and simplicity are critical—such as solvent evaporation, filtration, degassing, and drying processes in chemistry, pharmaceutical, and materials labs.

Key Features

• Two-point pressure control with user-adjustable setpoint (1–1080 mbar) and hysteresis (0.5–50 mbar), ensuring stable operation across varying process loads
• Dedicated controller housing with IP42-rated front panel, built-in LED status indicators for valve state and error conditions, and intuitive rotary encoder for parameter navigation
• Integrated analog input (0–10 V or 4–20 mA) compatible with standard industrial vacuum transducers, supporting both absolute and relative pressure measurement configurations
• VV-B 6C high-cycle solenoid valve rated for ≥10 million switching operations, chemically resistant EPDM seals, and NC (normally closed) configuration for fail-safe vacuum isolation
• Modular design: plastic T-fitting enables rapid integration into existing vacuum lines without welding or specialized tools; all components comply with RoHS and REACH directives
• No internal battery or firmware updates required—designed for zero-maintenance operation under continuous laboratory use

Sample Compatibility & Compliance

The CVC 3000 is intended for use with oil-free diaphragm vacuum pumps (e.g., VACUUBRAND MD 4C NT, RC 6, or comparable models from KNF, Welch, or Agilent). It is not suitable for high-vacuum applications (<1 mbar) or corrosive gas streams unless paired with chemically compatible sensors and valves. The system meets CE marking requirements under the EU Machinery Directive 2006/42/EC and Electromagnetic Compatibility Directive 2014/30/EU. While not certified to ISO 9001 at the unit level, its components are manufactured in accordance with VACUUBRAND’s ISO 9001-certified quality management system. For regulated environments (e.g., GLP or GMP labs), the controller supports manual logbook documentation of setpoints and operational history; however, it does not provide electronic audit trails or 21 CFR Part 11-compliant data recording out-of-the-box.

Software & Data Management

The CVC 3000 operates as a standalone hardware controller with no embedded software, cloud connectivity, or PC interface. All configuration is performed locally via front-panel controls. No drivers, firmware, or proprietary software are required—eliminating compatibility risks and cybersecurity exposure. For laboratories requiring digital data capture, the analog output signal (0–10 V) can be routed to external data acquisition systems (e.g., LabVIEW, MATLAB, or PLC-based SCADA platforms) for time-stamped pressure logging and trend analysis. Users must supply and validate the external DAQ system per their internal SOPs. VACUUBRAND provides full electrical schematics and calibration guidelines in the English-language operating manual (Document No. 683169-EN), available for download from the official support portal.

Applications

• Routine rotary evaporation with automatic pressure stabilization during solvent removal
• Vacuum-assisted filtration in analytical sample preparation workflows
• Controlled degassing of polymer resins, adhesives, or composite precursors prior to curing
• Staged vacuum drying of hygroscopic or thermolabile compounds in stability chambers
• Process development for lyophilization pre-freezing steps where coarse vacuum suffices
• Integration into automated synthesis platforms where simple, deterministic vacuum logic is preferred over PID complexity

FAQ

Does the CVC 3000 include a built-in vacuum sensor?
No—the CVC 3000 requires an external analog vacuum transducer (e.g., VACUUBRAND DIAVAC 10 or equivalent) connected via its 0–10 V or 4–20 mA input.
Can it control multiple pumps simultaneously?
No—it is designed for single-pump, single-line operation. Parallel control requires separate CVC 3000 units per pump line.
Is the VV-B 6C valve compatible with aggressive solvents like acetone or chloroform?
Yes—its EPDM elastomer seals exhibit broad resistance to common organic solvents; however, prolonged exposure to strong oxidizers (e.g., nitric acid vapor) or halogenated hydrocarbons above 60 °C is not recommended.
What is the typical pressure fluctuation around the setpoint?
Under stable thermal and flow conditions, deviation remains within ±(hysteresis value)/2—typically 1–10 mbar depending on user-defined hysteresis and system volume.
Can the controller be mounted inside a fume hood?
Yes—its IP42 rating protects against dripping water and solid objects ≥1 mm; however, ambient temperature must remain between 5 °C and 40 °C, and condensation must be avoided.