The Valve,safety Relief, cataloged under National Stock Number 4820-01-451-3263, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hydraseal Valve Co Inc. Government technical data includes 17 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.
| Parameter | Value |
|---|---|
| NSN | 4820-01-451-3263 |
| Primary Part Number | 24FL1ARVOL |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hydraseal Valve Co Inc |
| Status | ACTIVE |
| Flow Control Device | BALL |
| Flange Shape | ROUND ALL ENDS |
| Furnished Items and Quantity | 1 LEVER |
| Flange Face Design | RAISED STRAIGHT ALL ENDS |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | ANGLE FLANGED ENDS |
| Material Document and Classification | ASTM A216 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Valve Size | 1.500 INCHES IN |
| Bonnet Type | INSIDE SPRING |
| Second Connection Face to Centerline Distance | 6.750 INCHES IN |
| Bonnet Attachment Method | THREADED |
| First Connection Face to Centerline Distance | 4.875 INCHES IN |
| Material | STEEL BODY |
| Material | STEEL COMP 304 SEAT |
| Material | RUBBER SYNTHETIC PACKING |
| Material | STEEL CORROSION RESISTING STEM |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| 24FL1ARVOL PRIMARY | Hydraseal Valve Co Inc (USA) |
NSN 4820-01-451-3263 is a Valve,safety Relief, manufactured by Hydraseal Valve Co Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-451-3263 has 1 manufacturer part number on file: 24FL1ARVOL (Hydraseal Valve Co Inc).
Key specifications for 24FL1ARVOL: Flow Control Device: BALL; Flange Shape: ROUND ALL ENDS; Furnished Items and Quantity: 1 LEVER; Flange Face Design: RAISED STRAIGHT ALL ENDS. 17 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.