Edwards nEXT85D Turbomolecular Vacuum Pump

Product details

Edwards nEXT85D for your high-vacuum system

The Edwards nEXT85D offers a choice of inlet sizes for high-vacuum systems: NW40, DN63 and DN100. Nitrogen pumping speed ranges from 47 to 86 l/s depending on the inlet, so you can match the pump to your chamber connection and required performance.

Pumping speeds and connections

DN63 is available with ISO-K or CF flanges; DN100 is ISO-K. The figures above are for the D variant. A larger inlet gives a higher pumping speed, but the chamber port and connecting pipework also affect the speed available at the chamber.

High-vacuum inlet: NW40; DN63 ISO-K or CF; DN100 ISO-K. Backing connection: NW16.

Putting the system together

A suitable backing pump removes gas from the turbo pump’s exhaust and maintains the required forevacuum pressure. Its capacity needs to suit your gas load as well as the turbo model. Explore two-stage rotary vane backing pumps or ask us about an alternative arrangement for your process.

The nEXT range has integrated drive electronics. We can help you match the power supply, control interface, cables and any external controller to the exact pump version. Air and water cooling accessories are available; the right arrangement depends on gas type, throughput and ambient temperature.

Replacement pumps and servicing

Replacing an existing pump? Send us its full model reference and a photograph of the nameplate, together with the controller and flange details. We can check the connections and equipment needed for the replacement.

If the pump has developed a fault, include any fault code or change in performance when you ask about servicing.

Technical literature

Download the Edwards research and development brochure (PDF) for nEXT pumping-speed curves, dimensions and accessory options. Technical data for this model are on page 30.

Questions about the nEXT85D

Which other model should I compare?

Compare the nEXT240D if you need a DN100 inlet and 240 l/s nitrogen pumping speed. Check the gas-specific figures and installation requirements for both pumps before choosing.

Can this pump operate without a backing pump?

No. It needs a suitable backing pump and the manufacturer’s start-up and shutdown sequence. If you already have a backing pump, send us its model and your process details so we can check whether it is suitable.

Which vacuum gauges will I need?

The chamber and backing line operate at different pressures. Choose vacuum gauges that cover each measurement range and work with your gases and controls. Tell us your target pressure and whether you need a local display or a signal for the control system.

What is included with the pump?

Your quotation will set out the pump version, power supply, controls, cables and cooling accessories included. Let us know which items you already have so we can quote what you need.

Ask Girovac about this pump

Tell us the gas you are pumping, your target pressure, expected gas load and chamber connection. Request a quotation or call 01692 660117 for help with selection, price and availability.

Compare all turbomolecular pumps.