nES Single Stage Ex Series Rotary Vane

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Primary vacuum

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.

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Superior performance

Deliver consistent pumping performance with excellent vacuum stability

High reliability

Designed to maximise process efficiency

Low lifecycle cost

Efficient cooled motors, optimised oil retention, low pump temperatures, high reliability and minimum maintenance

Compact and clean

Robust and compact design

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

Technical Specifications

	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

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