STP451 turbomolecular pump offers field proven reliability for use in electron microscopes, scientific instruments and semiconductor applications. Edwards rotor technology gives class-leading performance for maximum process flexibility. The STP451 has been approved for use by major equipment manufacturers in the scientific instrument, semiconductor and magnetic media industries.

Features and benefits

  • Advanced rotor technology
  • Maximized process flexibility
  • Oil free
  • Low vibration
  • High reliability
  • Maintenance free
  • Advanced controller design
  • Auto tuning
  • Self diagnostic functions
  • d.c. motor drive
  • Battery-free operation
  • Compact design
  • Small footprint
  • Half rack controller
Technical data
Inlet flange ISO160 or DN160CF
Pumping speed  
N2 440 ls-1
H2 275 ls-1
Compression ratio  
N2 >108
H2 >2 x 104
Ultimate pressure ISO inlet flange 6,5 x 10-6 Pa
Ultimate pressure CF inlet flange 10-8 Pa
Maximum allowable inlet pressure  
Ambient cooled 0,066 Pa (5 x 10-4 Torr)
Maximum continuous outlet pressure  
Ambient cooled 13 Pa (0,1 Torr)
Rated speed 48000 rpm
Stop/Start time 3/5 min
Maximum inlet flange temperature 120°C
Input voltage 100 to 120 V a.c. (± 10) or 200 to V a.c. (±10)
Power consumption Start up / Continuous 350 / 100 VA
Pump 12 kg
Controller 7 kg