MD 4 VARIO selectVARIO® diaphragm pump
Overview
- VACUU·SELECT vacuum controller with graphical user interface and predefined applications simplifies work in the laboratory
- extraordinary diaphragm life for minimum operational and servicing costs
- contamination-free pumping and evacuation
- excellent ultimate vacuum and TURBO·MODE for use as backing pump for turbo pumps
Ultimate vacuum
1 mbar
Max. pumping speed 50 Hz
5.7 m3/h
VARIO® diaphragm pump in action
This three-stage diaphragm pump is an excellent solution for continuous, oil-free pumping of non-corrosive gases to a vacuum level as deep as 1 mbar. All wetted parts are made of aluminum, stainless steel and carefully selected plastics suitable for a wide range of applications with non-corrosive gases. The MD 4 VARIO select continuously adapts its motor speed to hold the desired vacuum level. That means the pump is whisper-quiet and generates ultra-low vibrations, and has high leak tightness. The highly flexible fabric-reinforced double FKM diaphragm is ideal for extended operating life. The VARIO design includes the variable speed pump and the VACUU·SELECT vacuum controller with external gauge head. The demand-responsive motor speed control on VARIO models further extends the already long lifetimes of diaphragms and valves. These three-stage diaphragm pumps are an excellent choice for continuous, contamination-free evacuation and pumping of non-aggressive gases at demanding vacuum conditions. They are especially suitable for applications requiring high volume flow in physics and analytics. The low ultimate vacuum makes these an attractive alternative to rotary vane pumps. Typical uses are as backing (roughing) pumps for turbomolecular drag pumps, for degassing of viscous media, as well as for exhaust gas analytics. Additionally, the VARIO® model provides vacuum control by precise adjustment of the diaphragm pump´s motor speed to process requirements. Back diffusion of oil or even oil back flow, e.g., into a high vacuum chamber is excluded due to its oil-free operation. For equipment manufacturers customized versions are available. Depending on the application the demand-responsive motor speed control of VARIO® models further extends the long diaphragm life for which VACUUBRAND pumps are well-known. In additon it provides an even higher pumping speed and enables precise vacuum control.
Technical data and graphs
| Max. pumping speed 50 Hz | 5.7 m3/h | Select diagram |
| Max. pumping speed 60 Hz | 3.4 cfm | |
| Ultimate vacuum | 1 mbar / 0.75 torr | |
| Number of heads | 4 | |
| Number of stages | 3 | |
| 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. outlet pressure (abs.) | 1.1 bar | |
| Inlet connection | small flange KF DN 16 | |
| Outlet connection | Silencer / G1/4" | |
| Rated motor power | 0.53 kW | |
| Protection class IEC 60529 | IP 20 | |
| Dimension L in mm | 325 mm | |
| Dimension B in mm | 235 mm | |
| Dimension H in mm | 245 mm | |
| Weight | 19.1 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 | |
| ATEX conformity | II 3/- G IIC T3 X Internal Atm. only | |
| NRTL certification | No | |
| Items supplied | Pump completely mounted, ready for use, with manual. | |
| Rated mains voltage range 1 | 200-230 V | |
| Mains frequency 1 | 50-60 Hz | |
| Interface | Ethernet (RJ45): Modbus TCP / USB (Type A): Data transfer, software update, RS-232 (additional adapter required) |
Downloads
Equipment
-
![VACUU·SELECT user management]()
VACUU·SELECT User Management Function extension for VACUU·SELECT controller- Flexible and individual permissions
- Ensure consistent process parameters
- Customized working environment
![Rubber vacuum tubing, DN 8,price per meter]()
DN 8 mm, sale per meter Rubber vacuum tubing- Natural rubber + SBR
- Nominal width DN 8 mm
- Sale per meter
![Clamping ring, aluminum, KF DN 10/16]()
KF DN 10/16 Clamping ring for small flange- Quick link
- Nominal width KF DN 10/16
- Material Aluminum
![External centering ring, PBT,sealing ring NBR, KF DN 10/16]()
KF DN 10/16 External centring ring for small flange- Nominal width KF DN 10/16
- Material PBT
- Material sealing NBR
![Small flange with hose nozzleDN 16/DN 10, PP]()
KF DN 16 / DN 10 mm Small flange with hose nozzle- Hose shaft
- Nominal width KF DN 16
- Material PP
![Air admittance valve VB M-B KF DN16 /G1/4 with hose nipple G1/4" - 6/10 mm,VACUU·BUS, certification (NRTL): C/US]()
VB M-B Air admittance valve- Electromagnetic solenoid valve
- High prevention against wear
- Leak rate 1 x 10-3 min l/s
![Set of diaphragms and valvesfor MD 4 NT, MV 2 NT,MD 4 NT VARIO, MV 2 NT VARIO]()
MD 4 NT / MV 2 NT / MD 4 NT VARIO / MV 2 NT VARIO Set of diaphragms and valves- Complete kit
- Original spare parts
- Easy assembly
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![MD 4 NT Diaphragm pump]()
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VARIO® diaphragm pump in action
This three-stage diaphragm pump is an excellent solution for continuous, oil-free pumping of non-corrosive gases to a vacuum level as deep as 1 mbar. All wetted parts are made of aluminum, stainless steel and carefully selected plastics suitable for a wide range of applications with non-corrosive gases. The MD 4 VARIO select continuously adapts its motor speed to hold the desired vacuum level. That means the pump is whisper-quiet and generates ultra-low vibrations, and has high leak tightness. The highly flexible fabric-reinforced double FKM diaphragm is ideal for extended operating life. The VARIO design includes the variable speed pump and the VACUU·SELECT vacuum controller with external gauge head. The demand-responsive motor speed control on VARIO models further extends the already long lifetimes of diaphragms and valves. These three-stage diaphragm pumps are an excellent choice for continuous, contamination-free evacuation and pumping of non-aggressive gases at demanding vacuum conditions. They are especially suitable for applications requiring high volume flow in physics and analytics. The low ultimate vacuum makes these an attractive alternative to rotary vane pumps. Typical uses are as backing (roughing) pumps for turbomolecular drag pumps, for degassing of viscous media, as well as for exhaust gas analytics. Additionally, the VARIO® model provides vacuum control by precise adjustment of the diaphragm pump´s motor speed to process requirements. Back diffusion of oil or even oil back flow, e.g., into a high vacuum chamber is excluded due to its oil-free operation. For equipment manufacturers customized versions are available. Depending on the application the demand-responsive motor speed control of VARIO® models further extends the long diaphragm life for which VACUUBRAND pumps are well-known. In additon it provides an even higher pumping speed and enables precise vacuum control.
Technical data and graphs
Max. pumping speed 50 Hz 5.7 m3/h Select diagram Max. pumping speed 60 Hz 3.4 cfm Ultimate vacuum 1 mbar / 0.75 torr Number of heads 4 Number of stages 3 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. outlet pressure (abs.) 1.1 bar Inlet connection small flange KF DN 16 Outlet connection Silencer / G1/4" Rated motor power 0.53 kW Protection class IEC 60529 IP 20 Dimension L in mm 325 mm Dimension B in mm 235 mm Dimension H in mm 245 mm Weight 19.1 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 ATEX conformity II 3/- G IIC T3 X Internal Atm. only NRTL certification No Items supplied Pump completely mounted, ready for use, with manual. Rated mains voltage range 1 200-230 V Mains frequency 1 50-60 Hz Interface Ethernet (RJ45): Modbus TCP / USB (Type A): Data transfer, software update, RS-232 (additional adapter required) 
für Zoom klicken
Max. pumping speed 50 Hz
für Zoom klicken
Pump down graph 50 Hz (10 l volume)
Downloads
MD 4 VARIO select VARIO® diaphragm pumpMD 4 VARIO select VARIO® diaphragm pumpEquipment
-
![VACUU·SELECT user management]()
VACUU·SELECT User Management Function extension for VACUU·SELECT controller- Flexible and individual permissions
- Ensure consistent process parameters
- Customized working environment
![Rubber vacuum tubing, DN 8,price per meter]()
DN 8 mm, sale per meter Rubber vacuum tubing- Natural rubber + SBR
- Nominal width DN 8 mm
- Sale per meter
![Clamping ring, aluminum, KF DN 10/16]()
KF DN 10/16 Clamping ring for small flange- Quick link
- Nominal width KF DN 10/16
- Material Aluminum
![External centering ring, PBT,sealing ring NBR, KF DN 10/16]()
KF DN 10/16 External centring ring for small flange- Nominal width KF DN 10/16
- Material PBT
- Material sealing NBR
![Small flange with hose nozzleDN 16/DN 10, PP]()
KF DN 16 / DN 10 mm Small flange with hose nozzle- Hose shaft
- Nominal width KF DN 16
- Material PP
![Air admittance valve VB M-B KF DN16 /G1/4 with hose nipple G1/4" - 6/10 mm,VACUU·BUS, certification (NRTL): C/US]()
VB M-B Air admittance valve- Electromagnetic solenoid valve
- High prevention against wear
- Leak rate 1 x 10-3 min l/s
![Set of diaphragms and valvesfor MD 4 NT, MV 2 NT,MD 4 NT VARIO, MV 2 NT VARIO]()
MD 4 NT / MV 2 NT / MD 4 NT VARIO / MV 2 NT VARIO Set of diaphragms and valves- Complete kit
- Original spare parts
- Easy assembly
This might also interest you
-
![MD 4 NT Diaphragm pump]()
MD 4 NT Diaphragm pump- Ultimate vacuum 1 mbar
- Pumping speed 3.8 m3/h
- Oilfree
![MD 1 Diaphragm pump]()
