The Diaphragm,actuator Valve,special, cataloged under National Stock Number 4820-01-541-3145, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 1 specification, 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.
| Parameter | Value |
|---|---|
| NSN | 4820-01-541-3145 |
| Primary Part Number | 7653290-1 |
| Item Name | Diaphragm,actuator Valve,special |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Style Designator | SPECIAL SHAPED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 7653290-1 PRIMARY | Naval Sea Systems Command (USA) |
NSN 4820-01-541-3145 is a Diaphragm,actuator Valve,special, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-541-3145 has 1 manufacturer part number on file: 7653290-1 (Naval Sea Systems Command).
Key specifications for 7653290-1: Style Designator: SPECIAL SHAPED; Special Features: ASSEMBLY CONSISTS OF THE FOLLOWING ITEMS LUBRICANT P/N 7653265-1 O-RING P/N 7653269-17O-RING P/N 7653433-1 SEAT SPRING P/N 7653291-1 VALVE CHECK 7653409-1 SEAT VALVE P/N 7653293-1 BODY VALVE P/N 7653305-1 PLATE BASE P/N 7653292-1 SPRING COMPRESSION P/N 7653280-1 DIAPHRAGM P/N 7653267-1; Part Name Assigned by Controlling Agency: DIAPHRAGM ASSEMBLY; End Item Identification: MK16 MOD 0 UNDERWATER BREATHING APPARATUS (NSW). 1 specification is documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
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.