Campure medias are designed and manufactured to ensure effective control of odors and ‘gas-phase’ molecular pollutants. Left untreated, these pollutants could cause irreversible and costly damage to industrial processes, manufacturing control equipment, museum contents, and document archives. Camfil Farr provide a comprehensive range of technical support services to ensure that Campure medias consistently provide the highest levels of cost effective protection in all applications.
Campure Corrosion Coupons are an economical and simple way to assess the corrosive potential of an environment. The coupons comprise a pair of copper and silver foil strips which are exposed to the environment. After a given period, the coupons are returned to the laboratory where the surface corrosion is determined. The types and relative amounts of corrosion on each metal are indicative of the corrosive agents in the air. Coupons may be used to assess an environment prior to selection and installation of a molecular filtration system, as well as to validate the ongoing performance after installation. Atmospheres may be classified according to the Instrument Society of America standard ISA-S71.04. Categories include Mild (G1), Moderate (G2), Harsh (G3) and Severe (GX).
Residual Life Analysis:
- Is important to predict the impending failure of a molecular filter due to saturation of the media. This may be achieved through a program of residual life analyses.
- In this laboratory technique, a sample of media returned from the field is analyzed for the residual content of the impregnation or chemical agent system. A series of measurements made at 3 or 6 month intervals allow the eventual deterioration in the condition of the media to be anticipated and plans put in place for replacement.
Full-Size Filter Testing:
- Camfil Farr has a unique test facility that allows full scale molecular filters to be tested under conditions which precisely replicate those experienced in actual applications.
- The molecular filtration test rig allows filters to be exposed to airflows with a wide variety of temperatures and relative humilities. The filters can then be challenged with a wide variety of gases or vapors.
- In fact the scope of the challenge is limited only by the availability of suitable detection equipment, and heath and safety concerns for the laboratory operators.
- Test results from the Whole Filter Test Rig are presented as curves of filter efficiency vs. adsorbed capacity. These curves accurately depict the behavior of a molecular filter throughout its useful life.
On-Line Monitoring:
- Some critical or highly sensitive applications may require performance monitoring at a higher level than can be provided by a combination of the above techniques.
- In particular continuous real-time monitoring may be required. Camfil Farr offers an “Environmental Corrosion Monitoring System” that will give a direct and continuous surveillance of gas levels, based on the reaction of internal copper and silver strips.
- LEDs indicate the environmental according to the Mild, Moderate, Harsh and Severe classifications. The unit also monitors and displays the two environmental parameters that strongly influence corrosion rates: temperature and relative humidity.
An optional sensor can be added which measures differential pressure across the filter elements. 4-20 mA outputs are available as standard for remote applications.