Figure 1 General view
1. NW40 inlet port
2. Gas ballast control (not fitted on No Gas
Ballast variant)
3. Cooling fan
4. NW25 exhaust port
5. Fan connector
6. Rubber feet
7. Electric connector
8. Voltage changeover switch cover
9. Run/Standby switch
10. 15
‑
way connector
11. Hour counter
12. Lifting eye
1. NW40 inlet port
2. Gas ballast control (not fitted on No Gas
Ballast variant)
3. Cooling fan
4. NW25 exhaust port
5. Fan connector
6. Rubber feet
7. Electric connector
8. Voltage changeover switch cover
9. Run/Standby switch
10. 15
‑
way connector
11. Hour counter
12. Lifting eye
2.3 Description
Refer to
for item numbers in brackets in the following descriptions.
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
on page 24 and contact us for any further assistance.
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.
11/2020 - ©Edwards Limited
Page 9
A73001880_N
A73001880_N - Introduction
Summary of Contents for A730-01-983
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