Valve, Safety Relief4820-01-228-1022

NSN 4820-01-228-1022 · NIIN 012281022 · Part number 189-3/4NPT/MX5500

Anderson Greenwood Lp Dba Anderson Greenwood Crosby · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 01343

Government record, cited

NSN 4820-01-228-1022 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-228-1022. Manufacturer of record part number: 189-3/4NPT/MX5500.

Also searched as 4820-01-228-1022 · 4820012281022 · NIIN 012281022 · 01-228-1022 · FSC 4820 Valves, Nonpowered · CAGE 01343 · 189-3/4NPT/MX5500

Nearby stock numbers ← 4820-01-228-1021 Valve, Check · 4820-01-228-1023 →

4820-01-228-1022 — Valves, Nonpowered

Features

Valve,safety Relief — FSC 4820
Flow Control Device: DISK
Connection Style: PLAIN,OPTIONAL END(PIPE) ALL ENDS
Connection Type: THREADED INTERNAL PIPE ALL ENDS
Style Designator: ANGLE
Thread Direction: RIGHT-HAND ALL ENDS
Nominal Thread Size: 0.750 INCHES ALL ENDS IN
Material: COPPER ALLOY BODY

Identification

NSN: 4820-01-228-1022
NIIN: 012281022
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 189-3/4NPT/MX5500
Manufacturer: Anderson Greenwood Lp Dba Anderson Greenwood Crosby

General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-228-1022, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Anderson Greenwood Lp Dba Anderson Greenwood Crosby. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-228-1022
Primary Part Number	189-3/4NPT/MX5500
Item Name	Valve,safety Relief
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Anderson Greenwood Lp Dba Anderson Greenwood Crosby
Status	ACTIVE
Flow Control Device	DISK
Connection Style	PLAIN,OPTIONAL END(PIPE) ALL ENDS
Connection Type	THREADED INTERNAL PIPE ALL ENDS
Style Designator	ANGLE
Thread Direction	RIGHT-HAND ALL ENDS
Nominal Thread Size	0.750 INCHES ALL ENDS IN
Material	COPPER ALLOY BODY
Thread Series Designator	NPT ALL ENDS
Opening Pressure Setting	5500.0 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

Part Number	Manufacturer
189-3/4NPT/MX5500 PRIMARY	Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA)

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 4820-01-228-1022?

NSN 4820-01-228-1022 is a Valve,safety Relief, manufactured by Anderson Greenwood Lp Dba Anderson Greenwood Crosby, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-228-1022?

NSN 4820-01-228-1022 has 1 manufacturer part number on file: 189-3/4NPT/MX5500 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby).

What are the specifications of 189-3/4NPT/MX5500?

Key specifications for 189-3/4NPT/MX5500: Flow Control Device: DISK; Connection Style: PLAIN,OPTIONAL END(PIPE) ALL ENDS; Connection Type: THREADED INTERNAL PIPE ALL ENDS; Style Designator: ANGLE. 10 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-228-1022 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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