Siemens LDS 6 - Purging

8.5 Purging
Conditions of purging media
For purging the optics housing side, nitrogen and instrument air are permissible as purging
media. Nitrogen, steam, air and gases which are not subject to the pressure equipment directive
Cat. 2 are permissible as purging gases for the process side.
Purging with instrument air, nitrogen
Maximum 󹪞ow of optics housing
purging
5 l/min
Maximum overpressure in the optics
housing
<500hPa (7.25psi)
Quality
- Instrument air
- Nitrogen
Free of oil and water (dew point 10 K below minimun ambient
temperature)
Purity better than 99.7%
Maximum 󹪞ow 500l/min
Dew point 10 K below minimum ambient temperature or better,
condensation on the optics must be avoided
Blower purging 
Maximum counter pressure 40hPa (0.6psi)
Maximum 󹪞ow rate 850l/min (224.5USgal/min)
Power consumption 370W
Degree of protection (fan) IP54, cover required to protect against rain
Steam purging 
Steam conditioning Overheated
Maximum temperature 240°C (464°F)
Minimum pressure >4000hPa (58psi)
Maximum pressure 16000hPa (232psi),
refers to a volume 󹪞ow of approx. 1 100 l/min (291 US gal/min)
Technical data
8.5Purging
LDS 6 & Optics housing CD 6 Compact Operating Instructions
62 Compact Operating Instructions, 12/2022, A5E03314905-AB