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Appendix
A
A344-02-880 Issue J
Appendix A E2M40S and E2M80S
(Superpumps)
A1 Introduction
A1.1
Scope of this appendix
This appendix provides additional information about the E2M40S and E2M80S. Read this appendix in conjunction with
the instructions in the main sections in this manual.
A1.2
Description
A1.2.1
Construction
The Superpump pumps differ from the standard pump models as follows:
z
Internal parts have been designed to ensure reduced maintenance time and an increase in the pump running
efficiency
z
There is no fine oil-filter element
z
The oil filler cap is replaced by a non-return valve and inlet union for use with dry nitrogen oil-box purge
z
The gas-ballast adjustor knob is replaced by a dry nitrogen inlet pipe union and solenoid valve assembly; see
A1.2.2
Purpose of dry nitrogen gas-ballast
Dry nitrogen is injected into the pump stator through the gas-ballast solenoid valve to prevent the majority of any
corrosive gases condensing during the compression cycle of the pump. This form of gas-ballast is also used to lightly
pressurise the void between the rotor and shaft seals and assists in preventing any leakage of pump oil. You can check
the condition of the shaft seals by reducing the dry nitrogen gas pressure to zero (at the gas-ballast flow regulator)
while the pump is operating. Any shaft seal oil leakage is indicated by the presence of oil in a clear section of the
gas-ballast external return pipe; see
Dry nitrogen is also introduced through a pipe union and non-return valve into the oil-box. This oil-box purge is used
when pumping flammable or toxic gases, where large scale dilution in the oil-box is necessary for safety reasons.
Summary of Contents for E1M40
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