nES EX Series Rotary Vane Pumps brochure
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.
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.
You are guaranteed a class-leading ultimate vacuum level without pressure fluctuations. The mechanism is designed to ensure minimal hotspots within the pump.
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.
| 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 | ||||||