FC Humidifiers – Perma Pure Knowledge Base

What Material Is Used To Bundle Nafion in the Header of PD Dryers or FC Humidifiers?

Gene Bohensky — Thu, 31 Jan 2019 02:42:55 +0000

Perma Pure uses a proprietary epoxy with a high corrosion resistance to bundle the tunes in the “header”. This material has been tested to work well with Nafion and keeps the seal between the sample gas and the purge gas. The same material is used in the FC100 Humidifier. For larger FC humidifiers, a proprietary polyurethane is used to perform the same function. Because this product was designed for fuel cell applications where only clean water is hsed, the enhanced corrosion resistance of the epoxy was not required and a more suitable material was found that would work better with larger bundles (up to 10,000 tubes on the FC800).

Are FC Humidifiers Available in Stainless Steel?

Gene Bohensky — Thu, 31 Jan 2019 00:32:07 +0000

The FC Series Humidifiers are available in Stainless steel, in two sizes. Those sizes are shown below:

Series	# Tubes	Standard Ports
FC100	80	1/4″ FNPT
FC150	480	3/4″ FNPT

Contact Perma Pure for more information on availablity.

What are the Port Sizes / Connection Sizes of the FC Humidifiers?

Gene Bohensky — Thu, 31 Jan 2019 00:23:05 +0000

The FC Series Humidifiers have different port sizes, depending on their size. Those sizes are shown below in the table: “FNPT” Denotes Female National Pipe Thread, which are US-Standard conical threads. We do not recommend using Telflon tape and/or metal fittings to connect with these humidifiers – unless you order the stainless steel versions of the FC 100 and FC 150, which are the only sizes available in stainless steel.

Series	# Tubes	Standard Ports
FC100	80	1/4″ FNPT
FC125	240	1/2″ FNPT
FC150	480	3/4″ FNPT
FC200	780	1″ FNPT
FC300	1660	1-1/2″ FNPT
FC400	2500	2″ FNPT
FC600	7000	2″ FNPT

PEM – Proton Exchange Membrane

Gene Bohensky — Fri, 28 Dec 2018 02:17:15 +0000

PEM – A Proton Exchange Membrane, is a semipermeable membrane generally made from ionomers and designed to conduct protons while acting as an electronic insulator and reactant barrier, e.g. to oxygen and hydrogen gas. It is common for Nafion to be used as a humidifier in PEM fuel cell applications.

FC Humidifier Port Configurations

Gene Bohensky — Tue, 25 Dec 2018 18:16:01 +0000

FC Humidifier Port Configurations

Each FC Series Humidifier is available in four different port configurations, and when you place your order, please let us know which configuration yuo want by placing the following suffix on the part number. If no suffix is included, we will supply our the default configuration, which is option 02, “Ports on same side of shell (in line)”.

5 – Port Configuration
Ports on opposite sides of shell	01
Ports on same side of shell (in line)	02
Ports rotated 90° clockwise	03
Ports rotated 90° counter-clockwise	04

Troubleshooting FC Leaks and Connections

Gene Bohensky — Tue, 25 Dec 2018 12:55:13 +0000

Troubleshooting FC Leaks and Connections

The end cap connections are conical NPT (National Pipe Thread), which is an American standard that might not be familiar to users in other countries. Because the threads are conical, over tightening the NPT connections causes the thermoplastic end caps to crack in-service and cause leaks. For this reason, we do not recommend Teflon tape to seal the threads for this reason, as the telflon makes it too easy to over tighten them.

We also recommend to use plastic fittings with FCs – metal fittings can also cause cracking, especially with higher temperature applications. The thermal expansion of common metals used is greater than the plastics used and can also be a source of cracking.