A705-61-880 Issue M
Page 8 © Edwards Limited 2012. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Technical data
2.6 Lubrication data
Note: Edwards Material Safety Data Sheets for the recommended oil and grease specified in Table 7 are available
on request.
2.7 Shaft-seals purge system
2.8 Connections
2.9 Noise data
Particular caution should be exercised when working with Fomblin oil that may have been exposed
to temperatures above 260 °C. Refer to the Edwards Materials Data Sheets for detailed
information.
Table 7 - Lubrication data
Recommended gearbox oil Mobil SHC629 Antiwear Synthetic Gear Oil 150 cst
Recommended perfluoropolyether oil Drynert 25/6, Fomblin Y25/6, Krytox 1525
Gearbox oil capacity
Minimum 1.4 litres, 0.37 US gal
Maximum 1.6 litres, 0.42 US gal
High vacuum bearings
Grease type Perfluoropolyether
Recommended grease Fomblin RT15
Table 8 - Shaft-seals purge system data
Purge gas Air or nitrogen
Regulated pressure of purge to shaft-seals 0.35 to 0.5 bar (5 to 7 psi) above exhaust back-pressure
Table 9 - Connections data
Pump inlet ISO100
Pump outlet ISO63
Recommended pump inlet seal Fluoroelastomer Co-Seal or fluoroelastomer trapped ‘O’
ring
Recommended pump outlet seal Fluoroelastomer trapped ‘O’ ring
Shaft-seals purge connection Suitable for ¼ inch outside diameter rigid tube
Cooling-water connections Suitable for ½ inch outside diameter rigid tube
Table 10 - Noise data
GV250 GV400
Typical continuous A-weighted sound pressure level
50 Hz electrical supply 79 dB(A) 82 dB(A)
60 Hz electrical supply 82 dB(A) 82 dB(A)
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