Instruction manual

Oct 04 Issue H
GV Dry Vacuum Pumps
PAGE
7
7
TECHNICAL DATA
2.6 Lubrication data
Note: BOC Edwards Material Safety Data Sheets for the recommended oil and grease specified in Table 6
are available on request.
2.7 Shaft-seals purge system
2.8 Connections
2.9 Noise data
Recommended gearbox oil Mobil SHC629 Antiwear Synthetic Gear Oil 150 cst
Gearbox oil capacity
Minimum
Maximum
1.4 litres, 0.37 US gal
1.6 litres, 0.42 US gal
High vacuum bearings
Grease type
Recommended grease
Perfluoropolyether
Fomblin RT15
Table 6 - Lubrication 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 7 - Shaft-seals purge system data
Pump inlet
Pump outlet
ISO100
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
1
/
4
inch outside diameter rigid tube
Cooling-water connections Suitable for
1
/
2
inch outside diameter rigid tube
Table 8 - Connections data
GV250 GV400
Typical continuous A-weighted sound pressure
level
50 Hz electrical supply
60 Hz electrical supply
79 dB(A)
82 dB(A)
82 dB(A)
82 dB(A)
Table 9 - Noise data