nES Single Stage Rotary Vane Pumps

Next generation single stage rotary vane pumps

An ideal solution for a broad range of requirements

A compact design with low maintenance

  • The nES series is both robust and compact in design. 
  • Low noise levels and vibration minimises environmental impact. 
  • Easy to maintain and high productivity.

Optimised oil return system

The optimised oil return and separation system supports stable pumping performance and minimises oil loss.

Low lifecycle cost

Efficient cooled motors, optimised oil retention, low pump temperatures, high reliability and minimum maintenance provides excellent lifecycle cost compared to other single stage rotary vane pumps.

Flexible and systemisation friendly

  • The nES range is available with boosters and combination kits to enable you to build a complete systemised ready-to-use unit. 
  • Alternatively combination kits, together with the nES pump and EH mechanical booster, are available as a kit of parts that allows for easy on-site assembly.

Technical specifications

  Units nES40 nES65 nES100 nES200 nES300 nES300S
Maximum displacement (50Hz) m3h-1 / cfm 44.0/25.9 59.0/34.8 98.0/57.4 180/106 280/165 330/194
Maximum displacement (60Hz) m3h-1 / cfm 53.0/31.2 71.0/41.8 117/68.9 230/130 340/200 385/227
Pumping speed (50 Hz) m3h-1 / cfm 38.5/22.7 54.0/31.8 87.5/51.5 170/100 240/141 284/167
Pumping speed (60Hz) m3h-1 / cfm 47.0/27.7 64.0/37.7 105/61.8 200/118 290/171 330/194
Ultimate vacuum without gas ballast mbar / torr 0.5/0.4 0.5/0.4 0.5/0.4 0.08/0.06 0.08/0.06 0.08/0.06
Ultimate vacuum 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 / G 40 ISO-F / G1 ¼ 40 ISO-F / G1 ¼ 40 ISO-F / G1 ¼ 63 ISO-F / G2 63 ISO-F / G2 63 ISO-F/G2
Outlet connection ISO / G 40 ISO-F / G1 ¼ 40 ISO-F / G1 ¼ 40 ISO-F / G1 ¼ 63 ISO-F / G2 63 ISO-F / G2 63 ISO-F/G2
Max permitted outlet pressure bar (abs) 1.15  1.15  1.15  1.15  1.15  1.15
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 1.3/1.4
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 1.8/1.9
Dimensions (LxWxH) approximate  mm 540x284x303 586x320x314 721x400x319 1002x535x415 1130x555x450 1117x565x450
Weight approximate kg / lb 67/148 86/190 104/230 142/313 244/539 244/539 
Motor protection rating   IP55 IP55 IP55 IP55 IP55 IP55
Motor rated power (50Hz) kW  1.3 1.8 3 4.5 5.5 6
Motor rated power (60Hz) kW / hp 1.3/2 1.8/3 3.6/5 5.5/7.5 6.6/10 7.2/10
Cooling   air air air air air air 
Noise level (50Hz) air/water dB(A) 58 60 61 69 72 72
Noise level (60Hz) air/water dB(A) 60 64 64 73 76 76
Oil refill capacity litre 1 2 2 5-9 8.5-11.5 8.5-11.5
Recommended oil Edwards ULTRAGRADE Performance 70 or ULTRAGRADE Endurance Extend 110  
  Units nES470 nES570 nES630 nES750
Maximum Displacement (50Hz) m3h-1 / cfm 470/277 570/366 700/412 840/494
Maximum Displacement (60Hz) m3h-1/ cfm 570/366 - 840/494 -
Pumping Speed (50Hz) m3h-1 / cfm 400/236 470/277 640/377 755/444
Pumping Speed (60Hz) m3h-1 / cfm 470/277 - 755/444 -
Ultimate vacuum without gas ballast mbar / torr 0.08/0.06 0.08/0.06 0.08/0.06 0.08/0.06
Ultimate vacuum with gas ballast mbar / torr 0.7/0.5 0.7/0.5 0.7/0.5 0.7/0.5
Inlet connection ISO / G 100 ISO-F/G3 100 ISO-F/G3 100 ISO-F 100 ISO-F
Outlet connection ISO / G 100 ISO-F/G3 I100 ISO-F/G3 100 ISO-F 100 ISO-F
Max permitted outlet pressure bar (abs) 1.15  1.15  1.15  1.15 
Max water vapour pumping rate (50Hz) kgh-1 / lbh-1 5.0/5.3 7.5/8.0 17/18 24/25
Max water vapour pumping rate (60Hz) kgh-1 / lbh-1 7.5/8.0 - 24/25 -
Dimensions (LxWxH) approximate mm 1330x866x779 1330x866x779 1563x909x740 1563x909x740
Weight approximate kg / lb 480/1059 550/1214 760/1678 760/1678
Motor protection rating   IP55 IP55 IP55 IP55
Motor rated power (50Hz) kW  11 11 18.5 18.5
Motor rated power (60Hz) kW / hp 13.2/15 - 18.5/25 -
Cooling   air/water air/water air/water air/water
Cooling water flow (if applicable) L/h 700 800 750 750
Noise level (50 Hz) air/water dB(A) 72/72 75/2 72/72 75/72
Noise level (60 Hz) air/water dB(A) 75/72 - 75/72 -
Oil refill capacity litre 20 20 20-23 20-23
Recommended oil Edwards ULTRAGRADE Performance 70 or ULTRAGRADE Endurance Extend 110

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