PartsTable TECHNICAL DATA SHEET

NSN 4820-01-284-2246Government record, cited

Seat, Valve4820-01-284-2246

NSN 4820-01-284-2246 · NIIN 012842246 · Part number 7543-001-002

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

Government record, cited

NSN 4820-01-284-2246 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-284-2246. Manufacturer of record part number: 7543-001-002.

Also searched as 4820-01-284-2246 · 4820012842246 · NIIN 012842246 · 01-284-2246 · FSC 4820 Valves, Nonpowered · CAGE 57574 · 7543-001-002 · 73423-20 · 73423 4IN ITEM 3

Nearby stock numbers ← 4820-01-284-2245 Seat, Valve · 4820-01-284-2247 Seat, Valve →

4820-01-284-2246 — Valves, Nonpowered

Features

Seat,valve — FSC 4820
Flange Diameter: 4.563 INCHES NOMINAL IN
Body Outside Diameter: 4.313 INCHES NOMINAL IN
Body Inside Diameter: 3.500 INCHES MINIMUM AND 3.505 INCHES MAXIMUM IN
Material: STEEL CORROSION RESISTING SEAT
Seating Surface Shape: ANGULAR
2 manufacturer part numbers on file
Manufacturer of record: Velan Valve Corp.

Identification

NSN: 4820-01-284-2246
NIIN: 012842246
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 7543-001-002
Manufacturer: Velan Valve Corp.

General Description

The Seat,valve, cataloged under National Stock Number 4820-01-284-2246, 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 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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	4820-01-284-2246
Primary Part Number	7543-001-002
Item Name	Seat,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Velan Valve Corp.
Status	ACTIVE
Flange Diameter	4.563 INCHES NOMINAL IN
Body Outside Diameter	4.313 INCHES NOMINAL IN
Body Inside Diameter	3.500 INCHES MINIMUM AND 3.505 INCHES MAXIMUM IN
Material	STEEL CORROSION RESISTING SEAT
Seating Surface Shape	ANGULAR

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
7543-001-002 PRIMARY	Velan Valve Corp. (USA)
73423 4IN ITEM 3	Velan Valve Corp. (USA)

Reference documents

Reference	Meaning
73423-20	D/9 Drawing number reference only Velan Valve 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 4820-01-284-2246?

NSN 4820-01-284-2246 is a Seat,valve, manufactured by Velan Valve Corp., classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-284-2246?

NSN 4820-01-284-2246 has 2 manufacturer part numbers on file: 7543-001-002 (Velan Valve Corp.), 73423 4IN ITEM 3 (Velan Valve Corp.).

What are the specifications of 7543-001-002?

Key specifications for 7543-001-002: Flange Diameter: 4.563 INCHES NOMINAL IN; Overall Height: 0.932 INCHES MINIMUM AND 0.937 INCHES MAXIMUM IN; Body Outside Diameter: 4.313 INCHES NOMINAL IN; Body Inside Diameter: 3.500 INCHES MINIMUM AND 3.505 INCHES MAXIMUM IN. 5 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-284-2246 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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