A732-01-880 Issue D
Page 4 © Edwards Limited 2018. All rights reserved.
Introduction
The XDS100B is a scroll booster, optimised for maximum pumping speed at inlet pressures between 1 mbar and
10 mbar (refer to Figure 2). The XDS100B is not suitable for prolonged operation at inlet pressures above 20 mbar,
for pumpdown of large volumes, or for rapid cyclic duty. Such operation may cause the pump to become hot or the
inverter to reduce the motor speed. The pump will speed up again after the load is reduced. Maximum rated
continuous operating pressure at 40 °C ambient is 20 mbar.
The pump is air-cooled by a fan (2) mounted at the opposite end to the motor. The fan will run on for one minute
after the pump is switched off. The XDS100B incorporates a thermal protection device that will stop the motor in the
event of thermal overload, such as high ambient temperature. The pump will restart after it has cooled down.
The pump is fitted with an hours counter (10), which indicates the total time that the pump has run.
1.4 Gas ballast control
The XDS100B booster does not have a gas ballast option; condensation is not likely to occur in the pump, as the normal
operating pressure is too low.
1.5 Construction
The pump scrolls are made of anodised aluminium. The motor housing is aluminium. All surfaces of the pump which
are exposed to the pumped gases are free from copper, zinc and cadmium.
Other materials of construction include fluorocarbon elastomer, nitrile, chemically resistant polymers, nickel and
stainless steel.
The tip seal is a PTFE composite material.
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