Disk, Valve4820-01-522-6172

NSN 4820-01-522-6172 · NIIN 015226172 · Part number 7533-501-146

Velan Valve Corp. · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 57574

Government record, cited

NSN 4820-01-522-6172 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-522-6172. Manufacturer of record part number: 7533-501-146.

Also searched as 4820-01-522-6172 · 4820015226172 · NIIN 015226172 · 01-522-6172 · FSC 4820 Valves, Nonpowered · CAGE 57574 · 7533-501-146 · 73811-13 ITEM 3B

Nearby stock numbers ← 4820-01-522-6164 Valve, Check · 4820-01-522-6173 Parts Kit, Diaphragm Replacement →

4820-01-522-6172 — Valves, Nonpowered

Features

Disk,valve — FSC 4820
Outside Diameter: 4.875 INCHES NOMINAL IN
Style Designator: SWING CHECK
Inside Diameter: 3.500 INCHES NOMINAL IN
2 manufacturer part numbers on file
Manufacturer of record: Velan Valve Corp.

Identification

NSN: 4820-01-522-6172
NIIN: 015226172
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 7533-501-146
Manufacturer: Velan Valve Corp.

General Description

The Disk,valve, cataloged under National Stock Number 4820-01-522-6172, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Velan Valve Corp.. Government technical data includes 3 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. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-522-6172
Primary Part Number	7533-501-146
Item Name	Disk,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Velan Valve Corp.
Status	ACTIVE
Outside Diameter	4.875 INCHES NOMINAL IN
Style Designator	SWING CHECK
Inside Diameter	3.500 INCHES NOMINAL IN

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
7533-501-146 PRIMARY	Velan Valve Corp. (USA)
73811-13 ITEM 3B	Velan Valve Corp. (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 4820-01-522-6172?

NSN 4820-01-522-6172 is a Disk,valve, manufactured by Velan Valve Corp., classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-522-6172?

NSN 4820-01-522-6172 has 2 manufacturer part numbers on file: 7533-501-146 (Velan Valve Corp.), 73811-13 ITEM 3B (Velan Valve Corp.).

What are the specifications of 7533-501-146?

Key specifications for 7533-501-146: Outside Diameter: 4.875 INCHES NOMINAL IN; Style Designator: SWING CHECK; Inside Diameter: 3.500 INCHES NOMINAL IN; Special Features: MATERIAL IS STELLITE 6. 3 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-522-6172 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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