Edwards nES40 ExPumping speed 38.5 m³/hUltimate pressure 0.5 mbar
Edwards nES300 Ex 3Ph 230/400 V ±10 % 50 Hz, 460 V ±10 % 60 Hz, ATEX category 2
The Edwards nES300 Ex is the ATEX version (category 2) of the single-stage rotary vane pump nES300 with a pumping speed of 240 m³/h at 50 Hz (290 m³/h at 60 Hz) and an ultimate pressure of 0.15 mbar. It is approved for applications with an explosive atmosphere inside and outside. Ehrler & Beck advises on selection and service.
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- Pumping speed 240 m³/h 50 Hz 290 m³/h 60 Hz
- Ultimate pressure 0.15 mbar
- Rated motor power 7.5 kW 50 Hz 9 kW 60 Hz
| Variant | Part number |
|---|---|
| 3Ph 230/400 V ±10 % 50 Hz, 460 V ±10 % 60 Hz, ATEX category 2 (selected) | A35618940 |
Edwards nES300 Ex – ATEX rotary vane pump of category 2
The nES300 Ex is the explosion-proof version of the nES300 from the Edwards nES series. It is marked in accordance with ATEX Directive 2014/34/EU with Ex II (i) 2 G b IIB+H2 T3 / (o) 2 G IIC T4 (10 °C < Ta < 40 °C) X – that is, internally (in contact with the process gas) for category 2 of explosion group IIB including hydrogen and externally for category 2 IIC. The pump delivers 240 m³/h at 50 Hz and 290 m³/h at 60 Hz and reaches 0.15 mbar without gas ballast. The motor delivers 7.5 kW at 50 Hz (230/400 V) and 9 kW at 60 Hz (460 V); the weight with oil filling is 200 kg.Use
The gases and vapours to be pumped should have an ignition temperature above 200 °C (temperature class T3 internal). Special conditions apply for safe operation (marking “X”), which are described in the Edwards operating instructions.Advice and service
Ehrler & Beck supports you in selection and ATEX-compliant sizing and carries out maintenance and repair.| Pumping speed 50Hz | 240 |
|---|---|
| Pumping speed 60Hz | 290 |
| Ultimate pressure | 0.15 |
| Rated motor power 50Hz | 7.5 |
| Rated motor power 60Hz | 9 |
| Weight | 200 |
| Inlet connection flange | DN50 / ANSI 2" |
| Outlet connection flange | DN40 / ANSI 2" |
| Noise level | 70 dB(A) |
| Cooling method | Air cooling |
| Oil type | Ultragrade 70 |
Additional technical data
| Technical data | Value |
|---|---|
| Design | Single-stage oil-sealed rotary vane vacuum pump, ATEX category 2, air-cooled |
| ATEX marking | Ex II (i) 2 G b IIB+H2 T3 / (o) 2 G IIC T4 (10 °C < Ta < 40 °C) X |
| Pumping speed (DIN 28400) 50 Hz / 60 Hz | 240 / 290 m³/h |
| Nominal pumping speed 50 Hz / 60 Hz | 280 / 340 m³/h |
| Ultimate pressure without / with standard gas ballast | 0.15 / 0.7 mbar |
| Water vapour tolerance (standard gas ballast) | 10 / 12 mbar (50 / 60 Hz) |
| Water vapour pumping capacity 50 Hz / 60 Hz | 1.3 / 1.8 kg/h |
| Motor voltage | 230/400 V ±10 % 50 Hz, 460 V ±10 % 60 Hz |
| Motor power 50 Hz / 60 Hz | 7.5 / 9 kW |
| Nominal speed 50 Hz / 60 Hz | 1500 / 1800 min⁻¹ |
| Sound pressure level 50 Hz / 60 Hz | 70 / 74 dB(A) |
| Ambient temperature | 10 to 40 °C |
| Gas inlet temperature | max. 60 °C up to 200 mbar inlet pressure, above that max. 40 °C |
| Weight (with oil filling) | 200 kg |
| Oil filling | 8.5–11.5 l |
| Connections | Inlet DN50 / ANSI 2", outlet DN40 / ANSI 2" |
| Type of protection | IP55 |
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