Typical applications for chemistry diaphragm pumps include evacuating chemically aggressive gases and vapors from such equipment as rotary evaporators, vacuum drying cabinets and centrifugal concentrators. Chemistry diaphragm pumps from VACUUBRAND have uncompromising chemistry designs: Due to fluorocompounds they are very resistant to chemical vapors from inlet to exhaust, and are very tolerant of condensate. Our two-, three- and four-stage pumps also have a gas ballast valve that helps to preserve pump performance when working with condensable vapors. Pumping chambers are hermetically separated from the drive space, 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 water waste of water-jet aspirators, and the contaminated waste-oil disposal of rotary vane 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)

Our chemistry diaphragm pumps are available in a full range of volume flow rates and ultimate vacuum options. Single-stage models reach as much as 70 mbar (absolute) vacuum. Connecting pump heads in series as two-, three- or four-stage pumps improves the ultimate vacuum to as much as 0.6 mbar. Connecting heads in parallel provides higher flow rates. Our line offers combinations that satisfy virtually any laboratory need.

M = diaphragm (membrane) pump

E, Z, D, V = number of pump stages
E = single stage, up to 70 mbar
Z = two stages, up to 7 mbar
D = three stages, up to 1.5 mbar
V = four stage, up to 0.6 mbar

C = chemistry design, with fluoropolymer flowpath

NT = labels the new series of pumps comprising the New Technology

AK = separator catchpot for inlet or outlet condensates, collects particles and droplets, keeps condensate in vacuum line from flowing into the pump, protecting pump performance and providing additional noise reduction on the pressure side

EK = exhaust vapor (emission) condenser for nearly 100% solvent recovery in compact design, protecting environment and lab air

TE = dry ice or water ice cooled emission condenser for solvent recovery

PC = "Pumping Unit, Chemistry" - a chemistry pump with vacuum control and solvent recovery

Chemistry vacuum system = a chemistry pump with accessories like inlet catchpot and/or solvent recovery

Chemistry pumping unit = a chemistry vacuum system with vacuum control and solvent recovery

SYNCHRO = pumping unit for simultaneous operation of two independent vacuum applications by a single pump

VACUUBRAND offers chemistry vacuum systems and chemistry pumping units as complete ready-to-connect systems with the best chemistry diaphragm pumps for the desired vacuum range and volume flow rate. You can maximize the vacuum application's efficiency, functioning and environmental protection with the right combination of coordinated accessories. The basic pumps of the different system families are mounted in a space-saving portable system and equipped with the accessories appropriate for particular applications.

AK - (as shown) the separator catchpot for inlet or outlet-side condensates. The inlet (suction-side) separator catchpot collects particles and droplets of liquid. An exhaust (pressure-side) separator collects outlet condensate, keeps condensate from returning to the pump and helps keep the pump whisper quiet.

EK - (as shown) the emission condenser for capturing vapors from the exhaust side of the pump. Made of shielded glass, it is compact, but still highly efficient. It allows for virtually 100% recovery of solvents and protection of the atmosphere.

EK Peltronic^® - an electronic emission condenser that operates without cooling water or dry ice. Peltier elements and air cooling afford clean, convenient refrigeration.

TE - a condenser for dry ice or water ice for emissions control and solvent recovery without cooling water supply.

Liquid level sensor: Keeps the collecting catchpots (at AK or EK) from overflowing; supplies warning signals via the electronic vacuum controller with VACUU·BUS^® connections, and stops the pumping process if needed.

Manometer: A mechanical vacuum manometer provides trend indication, and approximate vacuum levels on some of our more basic models.

• MZ 2C NT +AK+M+D
• PC 101 NT
• PC 201 NT

Two vacuum connections on one pumping unit: We have systems and pumping units with a second vacuum connection available for independently operating two processes in parallel with just one pump. Check valves reliably isolate the two different applications from one another.

Manual flow-control regulation: The flow-control valve is designed for easy adjustment of the effective volume flow rate, and mounted on the inlet separator on some pumping units