PlasmalabSystem100 Oxford Instruments Plasma Technology Installation Data
Installation Data (PECVD - TEOS)
Issue 10: February 11 Page 16 of 24 Printed: 10-Feb-11, 9:07
6. Pump set information
CAUTION
Where the rotary vane or Roots pumps are powered from a mains supply separate
from the PlasmalabSystem100, a separate 'emergency off' facility must be provided by the
customer.
6.1 Process pump options
6.1.1 Rotary pump purging
The requirements for rotary pump purging depend on the process used. Customers
should consult the pump manufacturer for their recommendations.
For Alcatel 2033 and 2063 rotary pumps, the recommended minimum N
2
purge rate is
2 litres/minute at a pressure of 2bar to 5bar. For highly corrosive or pyrophoric gases,
4 litres/minute is recommended.
6.1.2 Dry pump water cooling
For Alcatel ADP122P and ADS602P dry pumps, the recommended minimum cooling water
flow rate is 1 litre/minute.
* All fittings and pipework connected to the rotary pump exhaust must be made from industry standard
stainless steel. Refer to the OIPT Services Specifications document, sub-section 6.1.
** This figure applies only to the rotary vane pump; the roots blower does not require N
2
purging.