The Valve,safety Relief, cataloged under National Stock Number 4820-00-774-9538, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Anderson Greenwood Lp Dba Anderson Greenwood Crosby. Government technical data includes 26 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-00-774-9538 |
| Primary Part Number | A15052 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Furnished Items and Quantity | 2 NUT AND 1 WRENCH |
| Renewable Seat Ring Type | THREADED |
| Nominal Pipe Size Accommodated | 1.125 INCHES SECOND END IN |
| Nominal Pipe Size Accommodated | 0.375 INCHES FIRST END IN |
| Connection Style | SOCKET WITH BRAZING RING ALL ENDS |
| Connection Type | UNTHREADED INTERNAL PIPE ALL ENDS |
| Style Designator | ANGLE |
| Material Document and Classification | QQ-C-390,ALLOY D4/D FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | MIL-S-853,CLASS 7,TYPE A MIL SPEC SINGLE MATERIAL RESPONSE SEAT |
| Material Document and Classification | MIL-S-853,CLASS 7,TYPE A MIL SPEC SINGLE MATERIAL RESPONSE STEM |
| Material Document and Classification | MIL-S-867,CLASS 1 MIL SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Operating Pressure | 4000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Adjustable Pressure Range | +1501.0 TO 2000.0 POUNDS PER SQUARE INCH LBS |
| Features Provided | PRESSURE TIGHT OUTLET SIDE |
| Bonnet Type | EXPOSED SPRING |
| Maximum Operating Temp | 150.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Nondefinitive Spec/std Data | A1 TYPE AND C CLASS |
| Disk Loading Method | SPRING |
| Bonnet Attachment Method | BOLTED |
| Media for Which Designed | AIR SINGLE RESPONSE |
| Material | STEEL COMP 303 STEM |
| Material | STEEL COMP 303 SEAT |
| Material | COPPER ALLOY 922 BODY |
| Material | STEEL UNS J92650 FLOW CONTROL DEVICE |
| 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 |
|---|---|
| A15052 PRIMARY | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| Reference | Meaning |
|---|---|
| MILV20065 | 4/1 Identification reference U.S. Government activity |
NSN 4820-00-774-9538 is a Valve,safety Relief, manufactured by Anderson Greenwood Lp Dba Anderson Greenwood Crosby, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-774-9538 has 1 manufacturer part number on file: A15052 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby).
Key specifications for A15052: Flow Control Device: DISK; Furnished Items and Quantity: 2 NUT AND 1 WRENCH; Renewable Seat Ring Type: THREADED; Nominal Pipe Size Accommodated: 1.125 INCHES SECOND END IN. 26 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.