Howell Laboratories, Inc.

P. O. Box 389, 188 Harrison Rd., Bridgton Maine 04009 USA

(207) 647-3327	(888) 744-8359	FAX (207) 647-8273	contracts@howelllabs.com

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- An Employee-Owned Company -
Certified to ISO 9001:2000

HLI News
New contract: 7600 ECOLCELL Chlorinators for DDG-113 and follow ships. [More]
New Products
Portable seawater chlorinator: Port-A-Chlor 8600. [More]
Upgraded medium-pressure air dehydrator, Model 8785, to replace our obsolete Model 7053. Call now for more information
Customized potable water treatment systems for Iraqi 35m patrol boats ... ... or for your application! Call now for more information
Around the World
January 2010: HLI supporting relief efforts in Haiti
At HLI
September 2008: David Douglas joins HLI as Director of Sales, Marine Products.

Model 7440

Membrane Air Dehydrator for Ship's Service Air
for CV / CVN and Other USN Ships

Features:

• Small Package Size.
• Does Not Remove Oxygen from the Air Stream or Vent Oxygen-Rich Purge to the Space.
• Purge Air Consumption Adjustable to Exact Requirements - No Waste.
• Many Control/Indication Options Available.
• Three-Stage High-Performance Filtration Provides Optimum Protection for Membrane Elements.

General Description:

The Model 7440 is designed to provide clean, dry air for applications at air flows up to 400 scfm at 100 - 125 psig. Delivered dew point is typically 0°F at pressure, used for ship's service air applications. The 7440's state-of-the-art membrane technology uses no ozone-depleting substances, no complex refrigeration equipment, no chilled water, and no troublesome desiccant.

The first units were designed under NSWCCD-SSES contract #N65540-00-R-0077 for use with the RIX Industries MARC 350 low-pressure air compressor in the carrier fleet. That version includes transducers for inlet and outlet pressure and filter pressure drop, an orifice flowmeter, and a dew point sample port. Additional versions are available with:

• Filter pressure drop and outlet pressure gauges.
• Full ICAS instrumentation, including 115-VAC and instrument-level power inputs.
• Other instrumentation as required for specific applications.

Specifications:

• Qualified to MIL-S-901D Grade A shock and MIL-STD-167-1 environmental vibration. Welding is per NAVSEA S9074-AR-GIB-010/278.
• Inlet Air: Up to 400 scfm at 80 - 135 psig.
  Temperature 50 - 125° F.
  Maximum dew point saturated at 125° F and 80 psig.
• Outlet Air: 80 - 125 psig.
  Dew point 0° F at line pressure (-40° F at atmospheric pressure), adjustable to your requirements.
• Purge Loss: Variable for your requirements; nominal 65 scfm for 300 scfm outlet flow at 125 psig and 0° F pressure dew point.
• Chilled Water: None required.
• Electrical: Basic unit has none.
• Dimensions: 58" W x 26" D x 40" H.
• Weight: 770 lb.

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Mounting Footprint
(Top and Right Side Views)

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Last updated: 10/15/09 Webmaster: Al Friend © 2000-2009 Howell Laboratories, Inc. All rights reserved.		Printable Adobe Acrobat version
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