PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

SD-25Dehydrator Unit,nonreactivating

Pioneer Air Systems, Inc. · NSN 4440-01-320-1569 · FSC 4440 · No Item Name Available
Verified by PartsTable
NSN 4440-01-320-1569 — this item is cataloged by the U.S. Government under National Stock Number 4440-01-320-1569. Primary manufacturer part number: SD-25.
Features
  • Dehydrator Unit,nonreactivating — FSC 4440
  • 2 verified cross-references
  • Primary manufacturer: Pioneer Air Systems, Inc.
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Dehydrator Unit,nonreactivating, cataloged under National Stock Number 4440-01-320-1569, is classified within Federal Supply Class 4440 (No Item Name Available) of the Furnace, Steam, Drying, Nuclear Reactors group. The primary manufacturer of record is Pioneer Air Systems, Inc.. This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameDehydrator Unit,nonreactivating
FSC / FSG4440 — No Item Name Available (FSG 44)
ManufacturersPioneer Air Systems, Inc. (CAGE 1EH27)
Technical Specifications
ParameterValue
NSN4440-01-320-1569
Primary Part NumberSD-25
Item NameDehydrator Unit,nonreactivating
FSC / FSG4440 / 44 — No Item Name Available
ManufacturerPioneer Air Systems, Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
3110-00-100-8544E25 INTERCHANGEABLE
Bearing,ball,thrust
Abc Acquisition Company Dba Aetna Bearing Company
5975-00-235-52092FLEXIDUCT INTERCHANGEABLE
Raceway,nonmetallic
Geist Manufacturing Inc
4330-01-230-1262D25 INTERCHANGEABLE
Filter Element,fluid
Schroeder Industries Llc
6515-01-271-4894D-25 INTERCHANGEABLE
Sensor,oxygen Monitoring
Mallinckrodt Inc Anesthesia Products
4730-01-440-18468837323-01 INTERCHANGEABLE
Adapter,straight,pipe to Hose
Hdt Expeditionary Systems Inc
4730-01-589-1694D2.5 INTERCHANGEABLE
Nipple,pipe
Piedmont Pacific Corp
7035-01-733-2490SD25 INTERCHANGEABLE
Docking Station
Dell Marketing L.p.
Cross-Reference Index
Part NumberManufacturer
SD-25 Pioneer Air Systems, Inc. (USA)
D25 Pioneer Air Systems, Inc. (USA)
Related Parts
3110-00-100-8544INTERCHANGEABLE
BEARING,BALL,THRUST
E25
5975-00-235-5209INTERCHANGEABLE
RACEWAY,NONMETALLIC
2FLEXIDUCT
4330-01-230-1262INTERCHANGEABLE
FILTER ELEMENT,FLUID
D25
6515-01-271-4894INTERCHANGEABLE
SENSOR,OXYGEN MONITORING
D-25
4730-01-440-1846INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO HOSE
8837323-01
4730-01-589-1694INTERCHANGEABLE
NIPPLE,PIPE
D2.5
7035-01-733-2490INTERCHANGEABLE
DOCKING STATION
SD25

Frequently Asked Questions

What is NSN 4440-01-320-1569?

NSN 4440-01-320-1569 is a Dehydrator Unit,nonreactivating, manufactured by Pioneer Air Systems, Inc., classified under FSC 4440 (No Item Name Available). Status: active.

What are the part numbers for NSN 4440-01-320-1569?

NSN 4440-01-320-1569 has 2 cross-referenced part numbers: SD-25 (Pioneer Air Systems, Inc.), D25 (Pioneer Air Systems, Inc.).

What NSN replaces 4440-01-320-1569?

There are 7 known substitutes for 4440-01-320-1569: 3110-00-100-8544, 5975-00-235-5209, 4330-01-230-1262 and 4 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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