The Parts Kit,safety Relief Valve, cataloged under National Stock Number 4820-01-445-0287, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Watts Regulator Company. Government technical data includes 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-445-0287 |
| Primary Part Number | 887231 RK 909 RV 3.00IN |
| Item Name | Parts Kit,safety Relief Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Watts Regulator Company |
| Status | ACTIVE |
| Component Quantity | 9 |
| Document Type | MFR CATALOG |
| Component Document Page Number | 10 |
| Supply Items and Quantities | SLEEVE O-RING 1; PISTON O-RING 1; STEM O-RING 1; RV DISC ASSEMBLY 1; DIAPHRAGM 1; PISTON SEAL 1; BOTTOM PLUG O-RING 1; ADAPTER O-RING 1; LUBRICANT 1 |
| Document Source | 79227 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 887231 RK 909 RV 3.00IN PRIMARY | Watts Regulator Company (USA) |
| Reference | Meaning |
|---|---|
| 887231 RK 909 RV 3.00IN | 5/9 Secondary reference Key Industries Inc Dba Liberty Equipment and Supply Co |
NSN 4820-01-445-0287 is a Parts Kit,safety Relief Valve, manufactured by Watts Regulator Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-445-0287 has 1 manufacturer part number on file: 887231 RK 909 RV 3.00IN (Watts Regulator Company).
Key specifications for 887231 RK 909 RV 3.00IN: Component Quantity: 9; Document Type: MFR CATALOG; Component Document Page Number: 10; Supply Items and Quantities: SLEEVE O-RING 1; PISTON O-RING 1; STEM O-RING 1; RV DISC ASSEMBLY 1; DIAPHRAGM 1; PISTON SEAL 1; BOTTOM PLUG O-RING 1; ADAPTER O-RING 1; LUBRICANT 1. 5 specifications are 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.