The Valve,safety Relief, cataloged under National Stock Number 4820-01-322-7577, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Emerson Automation Solutions Final Control Us Lp Div Navy Product Team. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-322-7577 |
| Primary Part Number | NMP-1553 PART D- |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Flange Face Design | RAISED STRAIGHT ALL ENDS |
| Bolt Circle Nominal Diameter | 11.750 INCHES FIRST END IN |
| Bolt Circle Nominal Diameter | 9.500 INCHES SECOND END IN |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | ANGLE FLANGED ENDS |
| Bolt Hole Nominal Diameter | 0.875 INCHES ALL ENDS IN |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 6.000 INCHES IN |
| Adjustable Pressure Range | +25.0 TO 33.0 POUNDS PER SQUARE INCH LBS |
| Second Connection Face to Centerline Distance | 9.438 INCHES IN |
| Nominal Outside Diameter | 11.000 INCHES SECOND END IN |
| Nominal Outside Diameter | 13.500 INCHES FIRST END IN |
| Bolt Hole Quantity | 8 ALL ENDS |
| First Connection Face to Centerline Distance | 9.500 INCHES IN |
| Material | STEEL BODY |
| Raised Face Nominal Diameter | 10.620 INCHES FIRST END IN |
| Valve Operation Method | AUTOMATIC |
| Raised Face Nominal Height | 0.062 INCHES FIRST END IN |
| Nominal Thickness | 1.000 INCHES SECOND END IN |
| Nominal Thickness | 1.120 INCHES FIRST 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 |
|---|---|
| D-10Q 25T33PSI N | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| NMP-1553 PART D- PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| NMP-1553-01S0025 PRIMARY | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| Reference | Meaning |
|---|---|
| NMP-1553 PART D-10Q 25T33PSI | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| D-10Q 25T33PSI NMP-1553 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| NMP-1553 | D/9 Drawing number reference only Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| D-10Q 25T33PSI NMP-1553 | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| NMP-1553 PART D-10Q 25T33PSI | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| NMP-1553 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
NSN 4820-01-322-7577 is a Valve,safety Relief, manufactured by Emerson Automation Solutions Final Control Us Lp Div Navy Product Team, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-322-7577 has 3 manufacturer part numbers on file: D-10Q 25T33PSI N (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), NMP-1553 PART D- (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), NMP-1553-01S0025 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby).
Key specifications for NMP-1553 PART D-: Flow Control Device: DISK; Flange Shape: ROUND WITH HOLES ALL ENDS; Flange Face Design: RAISED STRAIGHT ALL ENDS; Bolt Circle Nominal Diameter: 11.750 INCHES FIRST END IN. 22 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.