The Valve,safety Relief, cataloged under National Stock Number 4820-01-226-2005, 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 27 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-226-2005 |
| Primary Part Number | 9875 0 TO 15 PSI |
| 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 |
| Flange Shape | ROUND WITH HOLES SECOND END |
| Furnished Items and Quantity | 1 LEVER |
| Nominal Pipe Size Accommodated | 0.750 INCHES FIRST END IN |
| Flange Face Design | PLAIN SECOND END |
| Connection Style | SOCKET FIRST END |
| Bolt Circle Nominal Diameter | 2.750 INCHES SECOND END IN |
| Connection Type | UNTHREADED INTERNAL PIPE FIRST END |
| Connection Type | FLANGE SECOND END |
| Style Designator | ANGLE |
| Bolt Hole Nominal Diameter | 0.625 INCHES SECOND END IN |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Adjustable Pressure Range | +0.0 TO 15.0 POUNDS PER SQUARE INCH LBS |
| Bonnet Type | INSIDE SCREW |
| Maximum Operating Temp | 425.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Nominal Outside Diameter | 3.875 INCHES SECOND END IN |
| Disk Loading Method | SPRING |
| Bolt Hole Quantity | 4 SECOND END |
| Bonnet Attachment Method | THREADED |
| Media for Which Designed | GAS, INERT SECOND RESPONSE |
| Media for Which Designed | STEAM THIRD RESPONSE |
| Media for Which Designed | AIR FIRST RESPONSE |
| Material | COPPER ALLOY BODY |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| Material | STEEL COMP 1008 STEM |
| Valve Operation Method | AUTOMATIC |
| Nominal Thickness | 0.344 INCHES SECOND END IN |
| 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 |
|---|---|
| 9875 0 TO 15 PSI PRIMARY | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| Reference | Meaning |
|---|---|
| 9875 | D/9 Drawing number reference only Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
NSN 4820-01-226-2005 is a Valve,safety Relief, manufactured by Anderson Greenwood Lp Dba Anderson Greenwood Crosby, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-226-2005 has 1 manufacturer part number on file: 9875 0 TO 15 PSI (Anderson Greenwood Lp Dba Anderson Greenwood Crosby).
2 possible matches (shared part number, not a government interchangeability claim): 6250-01-255-5086, 6145-01-258-1565. Verify interchangeability with system specifications before substitution.
Key specifications for 9875 0 TO 15 PSI: Flow Control Device: DISK; Flange Shape: ROUND WITH HOLES SECOND END; Furnished Items and Quantity: 1 LEVER; Nominal Pipe Size Accommodated: 0.750 INCHES FIRST END IN. 27 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.