Valve, Safety Relief4820-01-138-8389

NSN 4820-01-138-8389 · NIIN 011388389

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-01-138-8389 · 4820011388389 · NIIN 011388389 · 01-138-8389 · FSC 4820 Valves, Nonpowered · 529580 · 529580

Nearby stock numbers ← 4820-01-138-8206 Valve Assembly, Flow · 4820-01-138-8390 →

4820-01-138-8389 — Valves, Nonpowered

Features

Valve,safety Relief — FSC 4820
Flow Control Device: DISK
Connection Style: SOCKET (TUBE) ALL ENDS
Connection Type: UNTHREADED INTERNAL TUBE ALL ENDS
Style Designator: ANGLE
Nominal Outside Diameter Tube Accommodated: 0.625 INCHES ALL ENDS IN
Maximum Operating Temp: 225.0 FAHRENHEIT SINGLE RESPONSE DEGF
Media for Which Designed: AIR SINGLE RESPONSE

Identification

NSN: 4820-01-138-8389
NIIN: 011388389
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-138-8389, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-138-8389
Item Name	Valve,safety Relief
FSC / FSG	4820 / 48 — Valves, Nonpowered
Status	ACTIVE
Flow Control Device	DISK
Connection Style	SOCKET (TUBE) ALL ENDS
Connection Type	UNTHREADED INTERNAL TUBE ALL ENDS
Style Designator	ANGLE
Nominal Outside Diameter Tube Accommodated	0.625 INCHES ALL ENDS IN
Maximum Operating Temp	225.0 FAHRENHEIT SINGLE RESPONSE DEGF
Media for Which Designed	AIR SINGLE RESPONSE
Material	COPPER ALLOY BODY
Opening Pressure Setting	400.0 POUNDS PER SQUARE INCH LBS
Valve Discharge Flow Rate	1944.0 POUNDS PER HOUR LBS
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

Cross-Reference Index

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
529580	3/9 Design control — primary reference Fedders-Norge Ltd
529580	C/1 Advisory reference — outside the item-of-supply concept Lodestone Corp Div of Fedders Corp

No interchangeability data on file.

Other items in FSC 4820 — Valves, Nonpowered

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

4820-00-000-0097

4820-00-000-0097 · Item name not on file

4820-00-001-0010

VALVE,ROTARY,SELECTOR

4820-00-001-0020

4820-00-001-0020 · Item name not on file

4820-00-001-0021

4820-00-001-0021 · Item name not on file

4820-00-001-0032

4820-00-001-0032 · Item name not on file

4820-00-001-0037

VALVE,SAFETY RELIEF

4820-00-001-0042

4820-00-001-0042 · Item name not on file

4820-00-001-1230

4820-00-001-1230 · Item name not on file

Frequently Asked Questions

What is NSN 4820-01-138-8389?

NSN 4820-01-138-8389 is a Valve,safety Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.

What are the specifications of 4820-01-138-8389?

Key specifications for 4820-01-138-8389: Flow Control Device: DISK; Connection Style: SOCKET (TUBE) ALL ENDS; Connection Type: UNTHREADED INTERNAL TUBE ALL ENDS; Style Designator: ANGLE. 11 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-138-8389 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.

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