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Figure 1 General view
1. NW40 inlet port
1. NW40 inlet port
3. Cooling fan
3. Cooling fan
5. Fan connector
5. Fan connector
7. Electric connector
7. Electric connector
9. Run/Standby switch
9. Run/Standby switch
11. Hour counter
11. Hour counter
2.3 Description
Refer to
The XDS pump is a compact, reliable vacuum pump which is suitable for use on vapour
handling processes. It may be used for some pumping applications involving corrosive
substances and particulates, for information on pumping flammable gases, please refer
to
Implication of ATEX directive
The body of the pump includes a fixed scroll and an orbiting scroll. The orbiting scroll is
controlled by the electric motor through an eccentric cam on the motor drive shaft. The
movement of the orbiting scroll, meshed with the fixed scroll, forms successive crescent
shaped volumes in the pump. Gas that enters the pump through the inlet is compressed
by the movement of the orbiting scroll and swept towards the centre of the fixed scroll.
The compressed gas enters the exhaust port near the centre of the stationary scroll and
is exhausted from the pump through the outlet.
The XDS is a dry vacuum pump, as all the bearings, with their hydrocarbon lubricant, are
isolated from the vacuum space.
A73001880_P
A73001880_P - Introduction
Figure: General view
for item numbers in brackets in the following descriptions.
2. Gas ballast control (not fitted on No Gas
2. Gas ballast control (not fitted on No Gas
Ballast variant)
Ballast variant)
4. NW25 exhaust port
4. NW25 exhaust port
6. Rubber feet
6. Rubber feet
8. Voltage changeover switch cover
8. Voltage changeover switch cover
10. 15‑way connector
10. 15‑way connector
12. Lifting eye
12. Lifting eye
on page 24 and contact us for any further assistance.
Page 9
05/2022 - ©Edwards Limited
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