The Valve,safety Relief, cataloged under National Stock Number 4820-01-231-6656, 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 12 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-231-6656 |
| Primary Part Number | LL-2112-C 1/2IN 18 TP 32 MONEL |
| 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 |
| Style Designator | ANGLE |
| Adjustable Pressure Range | +18.0 TO 32.0 POUNDS PER SQUARE INCH LBS |
| Bonnet Type | INSIDE SPRING |
| Disk Loading Method | SPRING |
| Bonnet Attachment Method | UNION |
| Media for Which Designed | AIR SINGLE RESPONSE |
| Material | COPPER ALLOY BODY |
| Material | NICKEL ALLOY STEM |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| Material | NICKEL ALLOY SEAT |
| 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 |
|---|---|
| LL-2112-C 1/2IN 18 TP 32 MONEL PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| NMP215 1/2IN 18 TO 32 | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| Reference | Meaning |
|---|---|
| LL-2112-C 1/2IN 18 TO 32 MONEL | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| NMP215 1/2IN 18 TO 32 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| LL-2112-C 1/2IN 18 TO 32 MONEL | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| NMP215 1/2IN 18 TO 32 | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| LL-2112-C 1/2IN 18 TO 32 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| LL-2112-C 1/2IN | C/1 Advisory reference — outside the item-of-supply concept Kunkle Industries Inc Lonergan Valve Div |
NSN 4820-01-231-6656 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 4820-01-231-6656 has 2 manufacturer part numbers on file: LL-2112-C 1/2IN 18 TP 32 MONEL (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), NMP215 1/2IN 18 TO 32 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
Key specifications for LL-2112-C 1/2IN 18 TP 32 MONEL: Flow Control Device: DISK; Style Designator: ANGLE; Adjustable Pressure Range: +18.0 TO 32.0 POUNDS PER SQUARE INCH LBS; Bonnet Type: INSIDE SPRING. 12 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.