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Home
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Hydrogen Dryers

Desiccant-Membrane Hydrogen Dryers - DM Series

Perma Pure LLC

  • Removes only water vapor
  • Continuous drying
  • Low sample dew point
  • Fast response time
  • Rugged construction
  • Excellent corrosion resistance

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Description Vendor

The Perma Pure DM Series Desiccant-Membrane Dryer is a compact and portable gas drying solution designed for applications requiring moisture protection. It removes water vapor from a flowing gas stream without affecting other gas components, making it suitable for high-purity environments. The dryer operates without electrical power or purge gases by combining Nafion membrane tubing with a molecular sieve desiccant. Water vapor selectively permeates through the Nafion tubing and is absorbed by the surrounding desiccant. This hybrid design combines the selectivity of membrane drying with the simplicity of desiccant-based systems. The unit is reusable and can be quickly recharged by replacing the desiccant. It features a rugged molded ABS housing with a clear window for monitoring desiccant condition and is available in two models: DM-060-24 and DM-110-24, offering different flow capacities and drying performance.

Use Cases

  • Portable gas drying applications
  • Moisture protection for gas sampling systems
  • Field and laboratory gas conditioning

Capabilities

  • Selective removal of water vapor using Nafion membrane technology
  • Continuous drying without electrical power or purge gas
  • Integrated desiccant system for moisture absorption
  • Reusable design with replaceable desiccant
  • Visual monitoring of desiccant condition via clear window
Perma Pure LLC Perma Pure LLC, a Halma Company headquartered in Lakewood, New Jersey (in business since 1978 with 100-500 US employees), developed the first Nafion(R) dryers over 25 years ago and manufactures components and devices designed to dry and humidify gas streams using Nafion (a DuPont copolymer highly selective in water removal), branching from analytical/laboratory drying applications into specialty humidifiers for medical gas humidification and humidifying hydrogen for fuel cells. The company's FC-Series Fuel Cell Humidifiers -- described as the industry standard offering unparalleled performance, reliability, and lifetime up to 20,000 hours -- provide consistent, repeatable humidification of air and hydrogen across specified flow ranges for portable, stationary, automotive, and aerospace fuel cell applications, featuring low pressure drop and requiring no power to operate, significantly reducing parasitic load on fuel cell systems, with the FC100 Series compact for portable systems up to 500W and FC600 Series suitable for gas-to-gas humidification systems up to 50kW. Perma Pure's tubular membrane humidifiers selectively transfer water and heat from fuel cell exhaust gases (or liquid water) into fuel cell inlet gases, compatible with Polymer Electrolyte Membrane (PEM) fuel cell systems, with the company's Nafion tubing technology enabling water transport through the membrane wall via a perevaporation process driven by humidity gradients between inside and outside the tubing -- even processing samples containing high concentrations of very corrosive gases like hydrogen fluoride or hydrogen chloride. Offering the FC-Series Humidity Exchangers with flow rates from 10 lpm to 10,000 lpm and providing intelligent product numbering for various sizes, lengths, materials, and port configurations, Perma Pure continues supplying essential humidification technology critical to maintaining proper membrane hydration and performance in PEM fuel cell systems worldwide.
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