Edwards
Provisional entry — research in progress
This page was generated automatically from cited public sources and hasn't completed the full research pass yet. Every specification shown carries its source; more detail is added as research completes.
The pump is air-cooled, while its motor is enclosed and water-cooled, making it suitable for clean environments where fan cooling is not acceptable.[2][5]
The coupling-cover of the pump is connected to the pump outlet and forms an integral part of the vacuum system.[2][5]
Connecting pipelines incorporate a filter that removes debris to prevent contamination of the lubricating oil and bearings.[2][5]
The coupling-cover and bearings can be evacuated by connection to the pump inlet or to an external vacuum pump for an even cleaner system.[2][5]
Three motor-protection thermistors are fitted to the motor, one on each winding, with a normal resistance of 100 to 500 ohms; when the motor exceeds normal operating temperature the resistance rises rapidly to 3000 ohms, and the thermistors can be connected to control equipment for automatic system shutdown.[2][5]
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The pump body is air-cooled, while the motor is enclosed and water-cooled.[2][5]
The following facts about the QMB 500 are absent from this record as of this revision. First-hand knowledge or a citation closes a gap; every submission is reviewed before publication.
No publicly documented production dates or lifecycle milestones (introduction, end of production, EOL) for the QMB 500 are on record.
Answerable by: OEM historical records or a trade-press announcement
The control-system platform and OS era of the QMB 500 are not on record.
Answerable by: an engineer who operated it or OEM installation records
No publicly documented failure modes or field errata for the QMB 500 are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
The process node or technology generation of the QMB 500 is not on record.
Answerable by: an OEM datasheet or a fab qualification report
No publicly documented compatible parts, consumables, or accessories for the QMB 500 are on record.
Answerable by: an OEM parts catalog or a service engineer
No research found yet — worked with this tool? Share what you know.
Last updated Sep 24, 2026.