Chemistry diaphragm pumps

Chemistry diaphragm pumps from VACUUBRAND feature uncompromising chemistry designs. Their construction with fluoropolymers makes them very resistant to chemical vapors from inlet to exhaust and very tolerant to condensates. The two-, three- and four-stage pumps also have a gas ballast valve that provides a continuous purge with minimal impact on ultimate vacuum when working with condensable vapours.

Pumping chambers are hermetically separated from the drive system ensuring long lifetimes of mechanical parts. Most importantly, diaphragm pumps are oil-free, for vastly reduced service demands compared with oil-sealed pumps. They eliminate the cost of water when using water-jet aspirators, and the waste-oil disposal costs when using rotary vane pumps.

Nearly all VACUUBRAND diaphragm pumps and measuring instruments have been approved for ATEX equipment category 3 in the vapor path.

Vacuubrand pumps


  • PTFE sandwich diaphragms and valves made of perfluoro elastomer or PTFE
  • internal tubing and fittings made of PTFE/ETFE/ECTFE compounds
  • exceptional diaphragm lifetimes with ultra-durable PTFE sandwich design
  • head cover and clamping disc made of fluoro compounds with stability core for unsurpassed long-term performance
  • very long service intervals for low lifetime cost-of-ownership
  • patented new drive system for extra quiet, ultra-low-vibration operation (NT)
  • patented new valve mounting system to simplify service access (NT)
  • smooth surfaces for easy cleaning (NT)
  • new sealing system provides reduced leakage rates for improved ultimate vacuum (NT)

PC 3001 VARIO select

The PC 3001 VARIO select pumping unit precisely controls the vacuum level in order to achieve unparalleled process control. This pump is suitable for even high boiling point solvents. The integrated VACUU·SELECT controller provides an easy-to-use, application based touchscreen interface that covers all common lab applications.

  • Simplify lab work with the VACUU·SELECT vacuum controller with graphic user interface and predefined applications

  • Automatic boiling point detection and continuous optimisation of vacuum levels for quick process times

  • Compact and powerful; superior performance even with continuous condensate purge. Whisper quiet and ultra low vibration.

  • Eco-friendly: extremely low power consumption and efficient solvent recovery. Oil-free operation!

PC 3001 VARIO select Chemistry diaphragm pump

PC 3001 VARIO select

The VACUU·SELECT controller has you covered. Use manual set-point-control for simple processes, run fully automated distillations, or create your own application with simple drag-and-drop editing. For solvent evaporation, the VACUU·SELECT controller detects solvent boiling and automatically adjusts the pump’s motor speed to maintain process control. The VARIO motor speed control also makes the pump whisper quiet and provides for exceptionally long maintenance intervals.

The inlet separator, made of glass with a robust protective coating, prevents particles and liquid droplets from entering the pump, preventing damage and extending pump life. And the exhaust vapour condenser allows for nearly complete recovery of solvents when used with a chilled water line or recirculating chiller for economical recycling and environmental protection.

MD1C Vario Pump

Compact, chemically resistant diaphragm vacuum pump, perfect for rotary and parallel evaporation. Comes with an integrated vacuum controller for precise control of the vacuum level down to an ultimate vacuum of 2 mbar.

  • Outstanding chemical resistance and superior vapour tolerance

  • Exceptionally high performance even at low vacuum

  • Excellent ultimate vacuum even with gas ballast

  • Whisper quiet and ultra low vibration

Chemistry diaphragm pump MD 1C

MD1C Vario Pump

The three-stage construction provides the a combination of high pumping speed and low ultimate vacuum in a pump with a very small footprint. All parts in contact with pumped media are made of chemically resistant fluoroplastics. 

Chemistry diaphragm pumps

MD1C Diaphragm pump

The MD1C diaphragm pump with gas ballast valve is optimal for pumping easily condensable vapors (high boiling solvents) in applications that do not require vacuum control, such as rotary evaporators or drying chambers.

PC3001 Vario Pump

VB696702           PC3001 VarioPro Pump 230v UK Plug
VB696712           PC3001 TE Vario Chemistry Pumping Unit, UK mains cable
VB696722           PC3001 Basic Pumping Unit

MD1C Vario Pump

VB696110           MD1C Vario-SP Chemistry Diaphragm Pump
VB696602           MD1C 3-Stage Chemistry Diaphragm Pump 230v UK Plug
VB696622           MD1C Chem.Diaph.Pump with Separator and Exhaust Waste Vapour Condenser 230v UK Plug
VB696662           MD1C Vario Pump
VB696672           MZ1C Vario Pump