PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

VU1-4AValve,pneumatic Tank

Spx Corporation Div Spx / Robinair Div · NSN 4820-00-435-4351 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-435-4351 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-435-4351. Primary manufacturer part number: VU1-4A.
Features
  • Valve,pneumatic Tank — FSC 4820
  • Material: COPPER ALLOY SPRING
  • Commercial Spring Tension Rating: NOT RATED
  • First End Connection Type: THREADED EXTERNAL TUBE
  • Furnished Items: CAP
  • First End Outside Diameter Tube Accommodated: 0.250 INCHES NOMINAL IN
  • Flow Control Device: CORE
  • Material: COPPER ALLOY BODY
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy Spring construction
General Description

The Valve,pneumatic Tank, cataloged under National Stock Number 4820-00-435-4351, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Spx Corporation Div Spx / Robinair Div. Government technical data includes 21 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-435-4351
Primary Part NumberVU1-4A
Item NameValve,pneumatic Tank
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerSpx Corporation Div Spx / Robinair Div
StatusACTIVE
MaterialCOPPER ALLOY SPRING
Commercial Spring Tension RatingNOT RATED
First End Connection TypeTHREADED EXTERNAL TUBE
Furnished ItemsCAP
First End Outside Diameter Tube Accommodated0.250 INCHES NOMINAL IN
Flow Control DeviceCORE
MaterialCOPPER ALLOY BODY
Commercial Core Length DesignatorSTANDARD
Second End Relationship with First EndNOT IDENTICAL
Body StyleSTRAIGHT THRU
First End Seat Angle in Deg45.0
Second End Nominal Pipe Size Accommodated0.125 INCHES IN
End Connection Quantity2
First End Thread Class3A A
Media for Which DesignedAIR
Second End Connection TypeTHREADED EXTERNAL PIPE
Second End Style DesignatorPLAIN
MaterialCOPPER ALLOY SEAT
First End Thread DirectionRIGHT-HAND
First End Style DesignatorFLARED
Second End Thread DirectionRIGHT-HAND
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
2825-00-146-420940400 INTERCHANGEABLE
Seat
Northrop Grumman Systems Corporation Div Marine Systems
4820-01-097-035958066-0608 INTERCHANGEABLE
Valve,pneumatic Tank
Tld Ace Corp Div Tld Ace
5985-01-184-692740400 INTERCHANGEABLE
Attenuator,fixed
Plantronics Inc.
4130-01-261-008560025 INTERCHANGEABLE
Condenser Coil,refrigeration
Blissfield Manufacturing Company
5950-01-371-531540400 INTERCHANGEABLE
Reactor
Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit
5930-01-514-568640400 INTERCHANGEABLE
Switch,toggle
Ongaro Marine Ltd
6210-01-518-013740400 INTERCHANGEABLE
Light,indicator
Glamox Aqua Signal Corporation
4130-01-523-930640400 INTERCHANGEABLE
Evaporator Coil,refrigeration
Silver King Refrigeration Inc.
Cross-Reference Index
Part NumberManufacturer
404-00 Spx Corporation Div Spx / Robinair Div (USA)
VU1-4A Spx Corporation Dba O T C Tool & Equip Division Div Spx Corp - Kent-Moore/otc Divisons Dba Use CAGE Code 3e2t9 for Cataloging (USA)
723816-125 Raytheon Company Div Rmd Strategic (USA)
VU1-4A PRIMARY Spx Corporation Div Spx / Robinair Div (USA)
Related Parts
2825-00-146-4209INTERCHANGEABLE
SEAT
40400
4820-01-097-0359INTERCHANGEABLE
VALVE,PNEUMATIC TANK
58066-0608
5985-01-184-6927INTERCHANGEABLE
ATTENUATOR,FIXED
40400
4130-01-261-0085INTERCHANGEABLE
CONDENSER COIL,REFRIGERATION
60025
5950-01-371-5315INTERCHANGEABLE
REACTOR
40400
5930-01-514-5686INTERCHANGEABLE
SWITCH,TOGGLE
40400
6210-01-518-0137INTERCHANGEABLE
LIGHT,INDICATOR
40400
4130-01-523-9306INTERCHANGEABLE
EVAPORATOR COIL,REFRIGERATION
40400

Frequently Asked Questions

What is NSN 4820-00-435-4351?

NSN 4820-00-435-4351 is a Valve,pneumatic Tank, manufactured by Spx Corporation Div Spx / Robinair Div, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-435-4351?

NSN 4820-00-435-4351 has 4 cross-referenced part numbers: 404-00 (Spx Corporation Div Spx / Robinair Div), VU1-4A (Spx Corporation Dba O T C Tool & Equip Division Div Spx Corp - Kent-Moore/otc Divisons Dba Use CAGE Code 3e2t9 for Cataloging), 723816-125 (Raytheon Company Div Rmd Strategic), VU1-4A (Spx Corporation Div Spx / Robinair Div).

What NSN replaces 4820-00-435-4351?

There are 8 known substitutes for 4820-00-435-4351: 2825-00-146-4209, 4820-01-097-0359, 5985-01-184-6927 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of VU1-4A?

Key specifications for VU1-4A: Material: COPPER ALLOY SPRING; Commercial Spring Tension Rating: NOT RATED; First End Connection Type: THREADED EXTERNAL TUBE; Furnished Items: CAP. 21 total characteristics are documented in the Federal Logistics Information System.

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