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)
Chemistry diaphragm pumps, chemistry vacuum systems and chemistry pumping units
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.
Nomenclature for VACUUBRAND pumps is built from the following codes designating specific features or components:
M = diaphragm (membrane) pump
E, Z, D, V = number of pump stages from single ("E") to four ("V") stage design
C = chemistry design
NT = labels the new series of pumps comprising the New Technology
AK = separator for condensates, at inlet or at outlet
EK = exhaust vapor (emission) condenser for solvent recovery
TE = emission condenser for solvent recovery for dry ice or water ice
PC = "Pumping Unit, Chemistry" - a chemistry pump with vacuum control and solvent recovery
VARIO® or VARIO-B = speed controlled pump with vacuum controller CVC 3000
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.
The components
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 PeltronicTM - 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·BUSTM 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
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