Ultra High Purity Steam

The RASIRC Steamer uses a non-porous hydrophilic membrane that selectively allows water vapor and steam to pass through it. The chart below shows some typical results. Significant reduction can be seen in all contaminants, even with difficult contaminants such as Urea and ammonia.

Purification Performance Results (ppb)
	DI Water Source	Pre-Purified Steam	Purified Steam
Total Metals	19.8	0.15	0.009
Total Organic Carbon	1200	380	22
Total Silica	28	4.3	0.7
Urea	2200	48	2.6
Ammonium	1.468	1.117	0.116

Membrane selectivity is significant with water molecules passing through it 1,000,000 times faster than nitrogen molecules. In the vapor or steam phase, all other molecules are greatly restricted, so contaminants such as dissolved gases, ions, total organic carbons, particles, viruses, bacteria, pyrogens, and metals can be removed from the purified steam. Total metals have been verified to less than 10 ppt.

Data from tests done on water vapor purified using RASIRC Steamer show reduction of 67 different metals to below detectable limits. Some contaminants have been verified to less than 0.0005 parts per billion. Nitrogen and CO2 contaminants can also be virtually eliminated.