Gas Sample Dryers

Perma Pure Gas Sample Dryers Selection Guide

Perma Pure offers a wide range of Gas Sample Drying products that can be tailor-made for your application. Perma Pure’s MD Series™ and PD Series™ dryers are the ideal choice for drying gas samples prior to analysis. Using our exclusive Nafion™ technology, Perma Pure dryers can reduce the sample dew point to as low as -45°C without any measurable loss of analytes. The exceptional corrosion resistance of Nafion™ allows for the conditioning of harsh samples, even those rich in acids like HF and HCl. A brief review of each product line is shown below. Select your dryer based on your sample gas flow:

Gas Sample Drying
Flow Rates 0-4 lpm

Gas Sample Drying
Flow Rates 0-4 lpm

Gas Sample Drying
Flow Rates 1-40 lpm

Hot Gas Sample Drying
Flow Rates to 1 lpm

selector-md selector-mdr-series selector-pd selector-mdh

MD Dryer Series

The MD (Monotube Dryer) Series transfers moisture from one gas stream to a counter-flowing dry purge gas stream, much like a shell-and-tube heat exchanger transfers heat, using one Nafion™ tube. A wide range of lengths and tube diameters is available to cover the sample gas flow ranges of 0-4 lpm.

MD-R Dryer Series

The MD-R (Monotube Dryer, Rotating) Series is nearly identical to the MD Series with the advantage of rotating purge fitting ends, making it easier to install in your equipment. Like the MD, a wide range of lengths and tube diameters is available to cover the sample gas flow ranges of 0-4 lpm.

PD Dryer Series

The PD (Polytube Dryer) Series transfers moisture from one gas stream to a counter-flowing dry purge gas stream, much like a shell-and-tube heat exchanger transfers heat, using multiple Nafion™ tubes. These are chosen when the MD dryers do not offer the flow capacity required. A wide range of lengths and tube diameters is available to cover the sample gas flow range of 1-40lpm.

MD-H Heated Dryer

The MD-H Heated Dryer Series is a version of the MD Series where the first 24″ of the dryer is heated in order to handle hot and wet sample streams.

Short Video Presentations

Perma Pure has created a series of short video presentations to describe the basic functionality of Nafion™ Tubing and our Gas Sample Dryers. The videos are posted below. View the Nafion™ Tubing video before moving on to the Dryers.

Nafion™ Tubing Basic Functionality

Perma Pure MD and PD Gas Sample Dryers Basic Functionality