nES EX Series Rotary Vane Pumps brochure
nES Single Stage Ex Series Rotary Vane Pumps
Protection in explosive environments
Protection in explosive environments
Specifically designed to be capable of handling gases from a potentially explosive atmosphere and to operate in environments where potentially explosive atmospheres can be present. Pumps have been certified under the ATEX directive 2014/34/EU.
Equipped with sensors to protect your pump
nES pumps are equipped with sensors to measure pump temperature, oil level and pressure in oil casing. They are also equipped with PTC motor thermistors for motor and overcurrent protection.
Internal mechanism designed for low temperatures
You are guaranteed a class-leading ultimate vacuum level without pressure fluctuations. The mechanism is designed to ensure minimal hotspots within the pump.
Ideal for a wide range of applications
If your application includes an explosive environment, the nES is the ideal pump. It is suitable for use in the chemical, pharmaceutical, degassing, automotive and gas vapour recovery industries. Edwards’ applications team can help you identify the ideal use of the nES pump for your application.
Equipped with ATEX compatible accessories
- ATEX rated exhaust mist filter
- FPM seals
- Oil filter bypass
- ATEX rated motor and coupling
- Approved oil
- Gas ballast facility
- Technical Specifications
- Downloads
| Units | nES40ex | nES65ex | nES100ex | nES200ex | nES300ex | nES630ex | |
| Maxmimum Dispplacement 50Hz | m3h-1/cfm | 44.0 / 25.9 | 59.0 / 34.8 | 98.0 / 57.4 | 180 / 106 | 280 / 165 | 700 / 412 |
| Maxmimum Dispplacement 60Hz | m3h-1/cfm | 53.0 / 31.2 | 71.0 / 41.8 | 117 / 68.9 | 220 / 130 | 340 / 200 | - |
| Pumping Speed (50 Hz) | m3h-1/cfm | 38.5 / 22.7 | 54.0 / 31.8 | 87.5 / 51.5 | 170 / 100 | 240 / 141 | 640 / 377 |
| Pumping Speed (60 Hz) | m3h-1/cfm | 47.0 / 27.7 | 64.0 / 37.7 | 105 / 61.8 | 200 / 118 | 290 / 171 | - |
| Ultimate vacuum (total pressure) no gas ballast |
mbar / torr | 0.5 / 0.4 | 0.5 / 0.4 | 0.5 / 0.4 | 0.15 / 0.13 | 0.15 / 0.13 | 0.15 / 0.13 |
| Ultimate vacuum (total pressure) with gas ballast |
mbar / torr | 1.5 / 1.1 | 1.5 / 1.1 | 1.5 / 1.1 | 0.7 / 0.5 | 0.7 / 0.5 | 0.7 / 0.5 |
| Inlet Connection | ISO / ANSI | DN40 /ANSI 1"1/2 | DN40 /ANSI 1"1/2 | DN40 /ANSI 1"1/2 | DN50 /ANSI 2” | DN50 /ANSI 2” | DN100 ISO-K/ ANSI 4" |
| Outlet Connection | ISO / ANSI | DN40 /ANSI 1"1/2 | DN40 /ANSI 1"1/2 | DN40 /ANSI 1"1/2 | DN50 /ANSI 2” | DN50 /ANSI 2” | DN100 ISO-K/ ANSI 4" |
| Max permitted outlet pressure | bar (abs) | 1.15 abs | 1.15 abs | 1.15 abs | 1.15 abs | 1.15 abs | 1.15 abs |
| Max water vapour pumping rate (50Hz) | kgh-1/lbh-1 | 0.76 / 0.80 | 1.0 / 1.1 | 1.60 / 1.69 | 3.4 / 3.6 | 1.3 / 1.4 | 17 / 18 |
| Max water vapour pumping rate (60Hz) | kgh-1/lbh-1 | 0.90 / 0.95 | 1.25 / 1.32 | 1.70 / 1.80 | 5.4 / 5.7 | 1.8 / 1.9 | - |
| Dimenstions (L, W, H) | mm | 686 / 356/ 303 | 748 / 386/ 349 | 810 / 434 / 319 | 1084 / 535/ 435 | 1143 / 573 / 450 | 1568 / 989 / 740 |
| Weight | kg / lb | 67 / 148 | 86 / 190 | 104 / 230 | 142 / 313 | 244 / 539 | 695 / 1534 |
| Motor Protection rating | IP55 | IP55 | IP55 | IP55 | IP55 | IP65 | |
| Motor Power (50Hz) | kW / hp | 1.5 / 2.0 | 2.2 / 3.0 | 3.0 / 5.0 | 5.5 / 8 | 7.5 / 10 | 18.5 / 26 |
| Motor Power (60Hz) | kW / hp | 1.8 / 3.0 | 2.6 / 4.0 | 3.6 / 6.0 | 6.6 / 10 | 9 / 13 | - |
| Noise level (50Hz) | dB(A) | 58 | 60 | 61 | 69 | 72 | 72 |
| Noise level (60Hz) | dB(A) | 60 | 64 | 64 | 73 | 76 | - |
| Oil Refill Capacity | litre | 1 | 2 | 2 | 5 - 9 | 8.5 - 11.5 | 20 - 23 |
| Recommended oil | Ultragrade Endurance Extend 110 | ||||||