1. TURBO MOLECULAR PUMPS

Mobile Turbomolecular pump systems (STP)

Complete, ready-to-use, mobile units to generate high vacuums with an extremely high pumping speed in the fore-vacuum range.

The turbomolecular pump, the controller and the vacuum gauges are mounted on the central aluminum profile pillar at an optimum working height. The fore-vacuum pump is solidly mounted on a mobile base plate, to which the profile pillar is also attached. The vacuum apparatus (receptacle) may be either flange-mounted directly to the suction port of the turbomolecular pump, or the turbomolecular pump can be removed from its holder on the profile pillar and connected to the receptacle. The mobility of the pillar pump systems enables them to be positioned as near as possible to the receptacles, which means that only short vacuum lines are needed. A short vacuum line guarantees low flow losses and subsequently a high pumping speed from the receptacle.

The SST turbomolecular pump is equipped with dry-running, solid-lubricated hybrid rolling bearings (ceramic balls) which prevent the vacuum being contaminated by greases, oils or their decomposition products. This means that the design excludes residual hydrocarbon gas spectra.

All STP/D turbomolecular pump systems have an automatic switch off device for the fore-vacuum diaphragm pump. The fore-vacuum combination is switched off as soon as the ultimate pressure has been reached in the receptacle. The solenoid valve in the fore-vacuum piping to the turbomolecular pump is closed simultaneously. This prevents reverse venting of the turbomolecular pump and receptacle.

The major advantages of this automatic switch off are:

  • The service lives of the diaphragm pump are substantially increased to up to 10,000 operating hours
  • The sound level is noticeably reduced by at least 3 dB(A)
  • The operating costs for energy consumption are reduced, especially noticeable when several STP turbomolecular pump systems are used.
  • Pillar turbomolecular pump systems comprise:
  • SST turbomolecular pump with an integrated low vacuum stage
  • Type STP pump systems: a P 4 Z oil-combined, two-stage rotary vane pump
  • Type STP/D pump systems: an MP 601 T dry-running, three-stage diaphragm pump
  • Fore-vacuum gauge MRV 100 with measuring sensor CAP 121 for the automatic switch off –  for type STP/D
  • A solenoid valve in the fore-vacuum piping to the turbomolecular pump – for type STP/D
  • An aluminum profile pillar, with fixing and holding elements, mounted on a mobile base plate

Applications: Molecular distillation/sublimation, Tube furnace, Mass spectrometer, Leak detection