Chemistry-design diaphragm pumps are an excellent solution for continuous, oil-free pumping of corrosive gases and vapors. The one-stage construction provides the advantageous combination of high pumping speed and low ultimate vacuum down to 70 mbar. All major parts in contact with pumped media are made of chemically resistant fluoroplastics. Well-proven PTFE sandwich diaphragms increase reliability and extend operating life. The NT-series features further improved performance data, higher tolerance for condensates and simplified maintenance. The ME 4C NT is also available as chemistry vacuum system ME 4C NT +2AK with inlet separator to protect the pump against particles and liquid droplets, plus outlet separator to collect condensate. One-stage chemistry-design diaphragm pumps are an excellent choice for applications with corrosive gases and vapors which do not require very deep vacuum levels. They do not consume water and therefore do not produce any contaminated waste water. Typical applications are filtration as well as concentration of solvents with low boiling points. The ME 4C NT is recommended for processes which require higher flow rates. The chemistry vacuum system ME 4C NT +2AK with inlet separator and condensate catchpot is an excellent choice for rugged applications and for collecting condensates at the exhaust of the pump.
Technical data and graphs
| Max. pumping speed 50 Hz | 3.9 m3/h | Select diagram |
| Max. pumping speed 60 Hz | 2.6 cfm | Select diagram |
| Ultimate vacuum | 70 mbar / 52 torr | |
| Number of heads | 2 | |
| Number of stages | 1 | |
| Lower ambient temperature (operation) | 10 °C | |
| Upper ambient temperature (operation) | 40 °C | |
| Lower ambient temperature (storage) | -10 °C | |
| Upper ambient temperature (storage) | 60 °C | |
| Max. back pressure (abs.) | 1.1 bar | |
| Inlet connection | Hose nozzle DN 8-10 mm | |
| Outlet connection | Hose nozzle DN 8-10 mm | |
| Rated motor power | 0.18 kW | |
| Rated motor speed at 50/60 Hz | 1500/1800 min-1 | |
| Protection class IEC 60529 | IP 40 | |
| Dimension L in mm | 254 mm | |
| Dimension B in mm | 243 mm | |
| Dimension H in mm | 198 mm | |
| Weight | 11.1 kg | |
| Noise (sound pressure level) in dBA at 50 Hz or 1500 rpm/62% (VARIO)/1500 rpm (VARIO-SP)/12500 Upm (VACUU·PURE®) | 45 dBA | |
| NRTL certification | Yes | |
| Items supplied | Pump completely mounted, ready for use, with manual. | |
| Rated mains voltage range 1 | 100-115 V | |
| Rated mains voltage range 2 | 120 V | |
| Mains frequency 1 | 50-60 Hz | |
| Mains frequency 2 | 60 Hz |
The CVC 3000 detect is a ready to use two-set-point vacuum controller – available both as bench-top device and as a unit designed for attaching to a lab scaffold. It consists of the vacuum controller CVC 3000 with integrated ceramic vacuum sensor and venting valve that forms together with a non-return valve and the chemically resistant solenoid valve a very compact and easy to install unit for vacuum control. The electronic vacuum control increases the process efficiency and decisively improves the solvent recovery for existing vacuum sources like oil-free vacuum pumps or vacuum networks. In the “detect” mode the controller does approach and detect the boiling pressure and switches to the two-point vacuum control mode by itself. Manual settings are possible at any time during current operation. Many vacuum processes are carried out uncontrolled and thus often inefficient, and burdensome for environment and material. Controlled vacuum increases the solvent recovery rate with a rotary evaporator and so protects the environment. The vacuum pump is less loaded by the solvents, therefore the service intervals for valves and diaphragms are extended. The independent boiling point recognition also with solvent mixtures saves the user’s time and in addition avoids boiling retardation. With a CVC 3000 detect processes become reproducible which is particularly necessary in fields such as production and quality assurance.
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