NSN 4820-00-202-8398 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-202-8398. Manufacturer of record part number: D50UU-04-1-1 NON-MAG.
Connection Type: UNTHREADED INTERNAL TUBE FIRST END
Style Designator: ANGLE
Nominal Outside Diameter Tube Accommodated: 1.000 INCHES ALL ENDS IN
Operating Pressure: 100.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Adjustable Pressure Range: +34.0 TO 44.0 POUNDS PER SQUARE INCH LBS
Identification
NSN: 4820-00-202-8398
NIIN: 002028398
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: D50UU-04-1-1 NON-MAG
Manufacturer: Dante Valve Company
General Description
The Valve,safety Relief, cataloged under National Stock Number 4820-00-202-8398, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Dante Valve Company. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 9 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-00-202-8398
Primary Part Number
D50UU-04-1-1 NON-MAG
Item Name
Valve,safety Relief
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Dante Valve Company
Status
ACTIVE
Flow Control Device
DISK
Connection Style
PLAIN (TUBE) ALL ENDS
Connection Type
UNTHREADED INTERNAL TUBE FIRST END
Style Designator
ANGLE
Nominal Outside Diameter Tube Accommodated
1.000 INCHES ALL ENDS IN
Operating Pressure
100.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Adjustable Pressure Range
+34.0 TO 44.0 POUNDS PER SQUARE INCH LBS
Features Provided
PRESSURE TIGHT OUTLET SIDE
Disk Loading Method
SPRING
Media for Which Designed
STEAM SINGLE RESPONSE
Material
COPPER ALLOY OVERALL
Valve Operation Method
AUTOMATIC
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items9
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5950-00-333-530820199POSSIBLE MATCH
TRANSFORMER,POWER
Possible match (shared part number)Freed Transformer Co
4820-01-097-829120199-1POSSIBLE MATCH
VALVE,SAFETY RELIEF
Possible match (shared part number)Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-132-709120199HM41MPOSSIBLE MATCH
VALVE,SAFETY RELIEF
Possible match (shared part number)Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-139-173906792018127POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-143-431320199QM41MPOSSIBLE MATCH
VALVE,SAFETY RELIEF
Possible match (shared part number)Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-153-271520199EM41MPOSSIBLE MATCH
VALVE,SAFETY RELIEF
Possible match (shared part number)Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
5961-01-173-18281N5228BPOSSIBLE MATCH
SEMICONDUCTOR DEVICE,DIODE
Possible match (shared part number)Texas Instruments Incorporated
4820-01-206-082220199RM41MPOSSIBLE MATCH
VALVE,SAFETY RELIEF
Possible match (shared part number)Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
3445-01-269-845220199POSSIBLE MATCH
SHEARING MACHINE,SHEET METAL,UNI
Possible match (shared part number)Gravotech, Inc. Dba Gravotech Inc
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA)
Reference documents
Reference
Meaning
D50UU-04-1-1 NON-MAG
5/9Secondary reference
Danco Valve Company
20199
5/9Secondary reference
Anderson Greenwood Lp Dba Anderson Greenwood Crosby
20199GM41M-NON-MAG
5/9Secondary reference
Anderson Greenwood Lp Dba Anderson Greenwood Crosby
20199GS41S-NON-MAG
5/9Secondary reference
Anderson Greenwood Lp Dba Anderson Greenwood Crosby
Related Parts
5950-00-333-5308POSSIBLE MATCH
TRANSFORMER,POWER
20199
4820-01-097-8291POSSIBLE MATCH
VALVE,SAFETY RELIEF
20199-1
4820-01-132-7091POSSIBLE MATCH
VALVE,SAFETY RELIEF
20199HM41M
4820-01-139-1739POSSIBLE MATCH
STEM,FLUID VALVE
06792018127
4820-01-143-4313POSSIBLE MATCH
VALVE,SAFETY RELIEF
20199QM41M
4820-01-153-2715POSSIBLE MATCH
VALVE,SAFETY RELIEF
20199EM41M
5961-01-173-1828POSSIBLE MATCH
SEMICONDUCTOR DEVICE,DIODE
1N5228B
4820-01-206-0822POSSIBLE MATCH
VALVE,SAFETY RELIEF
20199RM41M
3445-01-269-8452POSSIBLE MATCH
SHEARING MACHINE,SHEET METAL,UNI
20199
Frequently Asked Questions
What is NSN 4820-00-202-8398?
NSN 4820-00-202-8398 is a Valve,safety Relief, manufactured by Dante Valve Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-00-202-8398?
NSN 4820-00-202-8398 has 2 manufacturer part numbers on file: D50UU-04-1-1 NON-MAG (Dante Valve Company), 20199GS41S-NON-MAG (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
What NSN replaces 4820-00-202-8398?
9 possible matches (shared part number, not a government interchangeability claim): 5950-00-333-5308, 4820-01-097-8291, 4820-01-132-7091. Verify interchangeability with system specifications before substitution.
What are the specifications of D50UU-04-1-1 NON-MAG?
Key specifications for D50UU-04-1-1 NON-MAG: Flow Control Device: DISK; Connection Style: PLAIN (TUBE) ALL ENDS; Connection Type: UNTHREADED INTERNAL TUBE FIRST END; Style Designator: ANGLE. 12 specifications are documented in the U.S. Government catalog.
Is NSN 4820-00-202-8398 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.