MD 4 VARIO select
MD 4 VARIO select
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.
Key Features
Specifications
| Weight | 19.1 kg |
| Manufacturer | BRAND (BrandTech Scientific) |
| Items supplied | Pump completely mounted, ready for use, with manual. |
| Vacuum controller | VACUU·SELECT |
| Protection class IEC 60529 | IP 20 |
| Upper ambient temperature (operation) | 40 °C |
| Lower ambient temperature (operation) | 10 °C |
| Dimension B in mm | 235 mm |
| Max. pumping speed 50 Hz | 5.7 m 3 /h |
| 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 (storage) | -10 °C |
| Upper ambient temperature (storage) | 60 °C |
| Max. back pressure (abs.) | 1.1 bar |
| Inlet connection | small flange KF DN 16 |
| Outlet connection | Silencer / G1/4" |
| Rated motor power | 0.53 kW |
| Dimension L in mm | 325 mm |
| Dimension H in mm | 245 mm |
| 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 Ex h IIC T3 Gc X Internal Atm. only |
| NRTL certification | No |
| 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) |