A Nafion™ Tubing -Based Solution Optimized for Marine CEMS

Perma Pure’s Marine-GASS™ Nafion™ tubing based Sample Conditioning Systems is the smart solution for Marine CEMS. Designed specifically to handle harsh shipboard applications, the system ensures long term reliability of SO2 measurements according to MEPC 184(59). Because the level of SO2 is so low coming out of the scrubber, a peltier based cooler is unable to condition the sample effectively – only Perma Pure’s Nafion™ tubing gas dryers can preserve the SO2 by removing the sample moisture in the vapor phase. Not all sample conditioning systems using Nafion™ tubing Permeation Dryers are alike – choose the system from the company that knows how to optimize their performance in the toughest applications.

Marine-GASS™ Main Advantages

  • Optimized Nafion™ polymer Management System guarantees long uninterrupted service life on ships
  • Elimination of Cooler Catastrophic Failure Mode protects analyzers from water damage
  • Unique Purge Gas Management assures reliable performance with poor compressed air quality

Environmental Ratings

  • Type 4, 4x (IP 66) Fiberglass Enclosure
  • Designed and tested to pass all Marine certification

Principal of Operation

The system contains two temperature-controlled zones mounted in an environmentally sealed, NEMA-4X housing.

First Zone:  High-Temperature Area
The sample passes through a two-stage filtration process to remove particles as small as 0.1 micron. Acid mists, if present, are coalesced and then removed by an auto drain. The sample then passes through a Nafion™ tubing dryer, which removes the moisture in the vapor phase. The initial portion of the dryer is heated above the sample dew point to prevent condensation and make drying more efficient. The high temperature zone is controlled at 70°C.

Second Zone:  Ambient-Temperature Area
In the second zone, the sample passes through the remainder of the dryer, further reducing the dew point to as low as 0°C. A second Nafion™ tubing dryer is used to dry the incoming compressed air that is used to purge itself and the sample gas dryer thereby avoiding the requirement for instrument air.