Powered by Nafion™ tubing, Perma Pure gas dryers selectively remove water from a gas sample. This selectivity for water vapor allows our dryers to remove more moisture than other gas drying solutions, while keeping analytes in the gas sample.
Monotube Dryer Series (MD-Series) gas dryers contain a single Nafion™ tube. The MD-Series can dry a gas to humidity levels as low as –40 °C dew point and is ideal for applications with flow rates up to 4 lpm.
Equipped with Nafion™ tubing, Perma Pure gas dryers excel in selectively eliminating water from gas samples. Their ability to specifically target water vapor enables these dryers to extract more moisture compared to other gas drying methods, without affecting the gas sample’s analytes.
The Monotube Dryer Series (MD-Series) features gas dryers with a singular Nafion™ tube. Designed for efficiency, the MD-Series achieves drying capabilities down to a –40 °C dew point, making it perfect for applications requiring flow rates of up to 4 liters per minute.
Direct your sample gas through the Nafion™ tubing and introduce a dry purge gas on the exterior of the Nafion™ tubing, moving in the opposite direction to the flow of the sample gas.
As long as the water’s partial pressure is lower in the purge gas compared to the sample gas, the Nafion™ polymer will selectively move water and water vapor from the sample gas through its membrane to the purge gas stream. This process results in a reduced moisture content in the sample gas exiting the system.
| Model | MD-070-48P-4, MD-070-96P-4, MD-110-144P-4, MD-110-96F-4, MD-700-48S-3 |
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| Nafion™ Tubing Outer Diameter Options | 0.050″ (MD-050), 0.070″ (MD-070), 0.110″ (MD-110) |
| Max. Flow Rate | 0.2 lpm (MD-050), 4 lpm (MD-070), 4 lpm (MD-110) |
| Housing Materials Available | Polypropylene, Fluorocarbon, or Stainless Steel |
| Max. Operating Temperatures | 80 °C for polypropylene housing, 100 °C for fluorocarbon or stainless steel housing |
| Sample Gas Port – End Fitting Options | Port 1/16″ Compression (MD-050, Stainless Steel Only) |
| Port 1/8″ Compression (All models) | |
| Port 1/4″ Compression (MD-070, MD-110) | |
| Purge Gas Port – End Fitting Size | Port 1/8″ Compression (MD-050) |
| Port 1/4” Compression (MD-070, MD-110) | |
| Purge Gas Recommendations | Purge gas must be drier than sample gas |
| Purge gas can be instrument quality air (max -40 °C dew point) or nitrogen | |
| Purge gas should flow at 2 or 3 times the sample rate | |
| *Alternate methods to using a purge gas are possible, such as recycling the dry sample gas, or pulling vacuum through the purge gas flow path. See website for more information. | |
| Coiled Configurations | Certain models are shipped coiled based on length. See page 4 for nominal diameters. Contact us for custom coiled solutions. |
MD-050 Model: Flow rates up to 0.2 lpm
MD-070 Model: Flow rates up to 4 lpm
MD-110 Model: Flow rates up to 4 lpm
The performance curves above are based upon a sample inlet dew point of 20°C and purge flow rate of 2x the sample flow rate. Consult our team for operation with sample gases condensing above ambient temperature.
psid (psi-differential) = [sample gas pressure at inlet (psig)] – [sample gas pressure at outlet (psig)], based on atmospheric pressure at outlet.
| MODEL | Nominal Coil Diameter | A | B | C | D | E | A | B | C | D | E |
| Material Codes: F, P, FP | Material Codes: S, FS | ||||||||||
| MD-050-12 | — | 1/8“ | 1/8“ | 1/8“ | 14 3/8“ | 11 1/8“ | 1/8” or 1/16“ | 1/8“ | 1/8“ | 13 5/8“ | 11 1/8“ |
| MD-050-24 | — | 1/8“ | 1/8“ | 1/8“ | 26 3/8“ | 23 1/8“ | 1/8” or 1/16“ | 1/8“ | 1/8“ | 25 5/8“ | 23 1/8“ |
| MD-050-48 | 4″ | 1/8“ | 1/8“ | 1/8“ | 50 3/8“ | 47 1/8“ | 1/8” or 1/16“ | 1/8“ | 1/8“ | 49 5/8“ | 47 1/8“ |
| MD-050-72 | 4″ | 1/8“ | 1/8“ | 1/8“ | 74 3/8“ | 71 1/8“ | 1/8” or 1/16“ | 1/8“ | 1/8“ | 13 5/8“ | 71 1/8“ |
| MD-070-12 | — | 1/4” or 1/8“ | 1/4“ | 1/4“ | 14 1/4“ | 10″ | 1/4” or 1/8“ | 1/4“ | 1/4“ | 13 3/4“ | 10 3/4“ |
| MD-070-24 | — | 1/4” or 1/8“ | 1/4“ | 1/4“ | 26 1/4“ | 22″ | 1/4” or 1/8“ | 1/4“ | 1/4“ | 25 3/4“ | 22 3/4“ |
| MD-070-48 | 7″ | 1/4” or 1/8“ | 1/4“ | 1/4“ | 50 1/4“ | 46″ | 1/4” or 1/8“ | 1/4“ | 1/4“ | 49 3/4“ | 46 3/4“ |
| MD-070-72 | 7″ | 1/4” or 1/8“ | 1/4“ | 1/4“ | 74 1/4“ | 70″ | 1/4” or 1/8“ | 1/4“ | 1/4“ | 73 3/4“ | 70 3/4“ |
| MD-070-96 | 7″ | 1/4” or 1/8“ | 1/4“ | 1/4“ | 98 1/4“ | 94″ | 1/4” or 1/8“ | 1/4“ | 1/4“ | 97 3/4“ | 94 3/4“ |
| MD-070-144 | 7″ | 1/4” or 1/8“ | 1/4“ | 1/4“ | 146 1/4“ | 142″ | 1/4” or 1/8“ | 1/4“ | 1/4“ | 145 3/4“ | 142 3/4“ |
| MD-110-12 | — | 1/4” or 1/8“ | 1/4“ | 1/4“ | 14 1/4“ | 10″ | 1/4” or 1/8“ | 1/4“ | 1/4“ | 13 3/4“ | 10 3/4“ |
| MD-110-24 | — | 1/4” or 1/8“ | 1/4“ | 1/4“ | 26 1/4“ | 22″ | 1/4” or 1/8“ | 1/4“ | 1/4“ | 25 3/4“ | 22 3/4“ |
| MD-110-48 | 7″ | 1/4” or 1/8“ | 1/4“ | 1/4“ | 50 1/4“ | 46″ | 1/4” or 1/8“ | 1/4“ | 1/4“ | 49 3/4“ | 46 3/4“ |
| MD-110-72 | 7″ | 1/4” or 1/8“ | 1/4“ | 1/4“ | 74 1/4“ | 70″ | 1/4” or 1/8“ | 1/4“ | 1/4“ | 73 3/4“ | 70 3/4“ |
| MD-110-96 | 7″ | 1/4” or 1/8“ | 1/4“ | 1/4“ | 98 1/4“ | 94″ | 1/4” or 1/8“ | 1/4“ | 1/4“ | 97 3/4“ | 94 3/4“ |
| MD-110-144 | 7″ | 1/4” or 1/8“ | 1/4“ | 1/4“ | 146 1/4“ | 142″ | 1/4” or 1/8“ | 1/4“ | 1/4“ | 145 3/4“ | 142 3/4“ |
© 2024 Analytical Solution & Engineering Sdn. Bhd. (Reg No.0656048A) | All Rights Reserved | Made With 🤍 By Pixalink
© 2024 Analytical Solution & Engineering Sdn. Bhd. (Reg No.0656048A) | All Rights Reserved | Made With 🤍 By Pixalink