The Valve,safety Relief, cataloged under National Stock Number 4820-01-240-3018, 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 27 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-240-3018 |
| Primary Part Number | NMP 1102 OPT-A |
| 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 | PLAIN ALL ENDS |
| Bolt Circle Nominal Diameter | 6.000 INCHES FIRST END IN |
| Bolt Circle Nominal Diameter | 4.750 INCHES SECOND END IN |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | ANGLE FLANGED ENDS |
| Bolt Hole Nominal Diameter | 0.750 INCHES ALL ENDS IN |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 3.000 INCHES IN |
| Adjustable Pressure Range | +57.0 TO 64.0 POUNDS PER SQUARE INCH LBS |
| Bonnet Type | INSIDE SPRING |
| Maximum Operating Temp | 150.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Nominal Outside Diameter | 6.000 INCHES SECOND END IN |
| Nominal Outside Diameter | 7.500 INCHES FIRST END IN |
| Disk Loading Method | SPRING |
| Bolt Hole Quantity | 4 ALL ENDS |
| Bonnet Attachment Method | UNION |
| Media for Which Designed | WATER, FRESH FIRST RESPONSE |
| Media for Which Designed | WATER, SALT SECOND RESPONSE |
| Material | COPPER ALLOY BODY |
| Material | NICKEL ALLOY STEM |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| Material | NICKEL ALLOY SEAT |
| Valve Operation Method | AUTOMATIC |
| Nominal Thickness | 0.625 INCHES FIRST END IN |
| Nominal Thickness | 0.500 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 |
|---|---|
| NMP 1102 OPT-A PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| BBMGG01MHK PRIMARY | Dante Valve Company (USA) |
| Reference | Meaning |
|---|---|
| NMP1102 0PTI0N | C/1 Advisory reference — outside the item-of-supply concept Kunkle Industries Inc Lonergan Valve Div |
| D51FF-02 2IN X 3IN | 5/9 Secondary reference Danco Valve Company |
| D51FF-02 2IN X 3IN | 5/9 Secondary reference Mindeco Corp |
| BBMGG01MHK | 5/9 Secondary reference Danco Valve Company |
| NMP 1102 OPT-A | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| NMP 1102 OPT-A | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| 46-H0-205/M5 | C/1 Advisory reference — outside the item-of-supply concept Kunkle Industries Inc Lonergan Valve Div |
NSN 4820-01-240-3018 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 4820-01-240-3018 has 2 manufacturer part numbers on file: NMP 1102 OPT-A (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), BBMGG01MHK (Dante Valve Company).
Key specifications for NMP 1102 OPT-A: Flow Control Device: DISK; Flange Shape: ROUND WITH HOLES ALL ENDS; Flange Face Design: PLAIN ALL ENDS; Bolt Circle Nominal Diameter: 6.000 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.