Valve, Safety Relief4820-01-179-9835

NSN 4820-01-179-9835 · NIIN 011799835

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-01-179-9835 · 4820011799835 · NIIN 011799835 · 01-179-9835 · FSC 4820 Valves, Nonpowered

Nearby stock numbers ← 4820-01-179-9834 Valve, Safety Relief · 4820-01-179-9836 →

4820-01-179-9835 — Valves, Nonpowered

Features

Valve,safety Relief — FSC 4820
Flow Control Device: DIAPHRAGM
Connection Style: PLAIN (TUBE) ALL ENDS
Connection Type: UNTHREADED EXTERNAL TUBE ALL ENDS
Style Designator: ANGLE
Nominal Outside Diameter Tube Accommodated: 0.875 INCHES ALL ENDS IN
Bonnet Type: INSIDE SPRING
Maximum Operating Temp: 200.0 FAHRENHEIT SINGLE RESPONSE DEGF

Identification

NSN: 4820-01-179-9835
NIIN: 011799835
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-179-9835, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-179-9835
Item Name	Valve,safety Relief
FSC / FSG	4820 / 48 — Valves, Nonpowered
Status	ACTIVE
Flow Control Device	DIAPHRAGM
Connection Style	PLAIN (TUBE) ALL ENDS
Connection Type	UNTHREADED EXTERNAL TUBE ALL ENDS
Style Designator	ANGLE
Nominal Outside Diameter Tube Accommodated	0.875 INCHES ALL ENDS IN
Bonnet Type	INSIDE SPRING
Maximum Operating Temp	200.0 FAHRENHEIT SINGLE RESPONSE DEGF
Bonnet Attachment Method	THREADED
Media for Which Designed	REFRIGERANT 12 FIRST RESPONSE
Media for Which Designed	REFRIGERANT R-502 SECOND RESPONSE
Material	COPPER ALLOY BODY
Material	STEEL CORROSION RESISTING FLOW CONTROL DEVICE
Material	COPPER ALLOY STEM
Material	RUBBER SYNTHETIC SEAT
Opening Pressure Setting	300.0 POUNDS PER SQUARE INCH 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
5423-300PSIG	3/9 Design control — primary reference Henry Technologies, Inc.

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 4820-01-179-9835?

NSN 4820-01-179-9835 is a Valve,safety Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.

What are the specifications of 4820-01-179-9835?

Key specifications for 4820-01-179-9835: Flow Control Device: DIAPHRAGM; Connection Style: PLAIN (TUBE) ALL ENDS; Connection Type: UNTHREADED EXTERNAL TUBE ALL ENDS; Style Designator: ANGLE. 16 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-179-9835 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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