The Valve,safety Relief, cataloged under National Stock Number 4820-00-202-6638, 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 30 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-202-6638 |
| Primary Part Number | L-2210-C 2IN MONEL TRIM |
| 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 |
| Renewable Seat Ring Type | WELDED |
| Flange Face Design | PLAIN ALL ENDS |
| Bolt Circle Nominal Diameter | 4.438 INCHES ALL ENDS IN |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | ANGLE FLANGED ENDS |
| Material Document and Classification | QQ-C-390 ALLOY D4 FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | QQ-N-281 CL B FED SPEC 1ST MATERIAL RESPONSE OR MIL-B-16541 MIL SPEC 2ND MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | QQ-N-281 CL B FED SPEC 1ST MATERIAL RESPONSE OR MIL-B-994 CL D MIL SPEC 2ND MATERIAL RESPONSE STEM |
| Material Document and Classification | QQ-N-281 CL B FED SPEC SINGLE MATERIAL RESPONSE SEAT |
| Bolt Hole Nominal Diameter | 0.562 INCHES ALL ENDS IN |
| Operating Pressure | 100.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 2.000 INCHES IN |
| Adjustable Pressure Range | +18.0 TO 32.0 POUNDS PER SQUARE INCH LBS |
| Bonnet Type | INSIDE SPRING |
| Second Connection Face to Centerline Distance | 5.250 INCHES IN |
| Nominal Outside Diameter | 5.562 INCHES ALL ENDS IN |
| Disk Loading Method | SPRING |
| Bolt Hole Quantity | 6 ALL ENDS |
| Bonnet Attachment Method | UNION |
| Media for Which Designed | WATER, FRESH SECOND RESPONSE |
| Media for Which Designed | WATER, SALT FIRST RESPONSE |
| First Connection Face to Centerline Distance | 4.750 INCHES IN |
| Material | NICKEL ALLOY R-405 SEAT |
| Material | COPPER ALLOY 836 BODY |
| Material | NICKEL ALLOY R-405 OR COPPER ALLOY 462 STEM |
| Material | NICKEL ALLOY R-405 OR COPPER ALLOY 922 FLOW CONTROL DEVICE |
| Valve Operation Method | AUTOMATIC OR MANUAL |
| Nominal Thickness | 0.438 INCHES ALL ENDS 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 |
|---|---|
| L-2210-C 2IN MONEL TRIM PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| Reference | Meaning |
|---|---|
| NMP-149 | D/9 Drawing number reference only Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| BAMGG03MHH | C/1 Advisory reference — outside the item-of-supply concept Dante Valve Company |
| BAMGG03MHH | 5/9 Secondary reference Danco Valve Company |
| L-2210-C 2IN MONEL TRIM | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| L-2210-C 2IN MONEL TRIM | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
NSN 4820-00-202-6638 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 4820-00-202-6638 has 1 manufacturer part number on file: L-2210-C 2IN MONEL TRIM (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-225-0951. Verify interchangeability with system specifications before substitution.
Key specifications for L-2210-C 2IN MONEL TRIM: Flow Control Device: DISK; Flange Shape: ROUND WITH HOLES ALL ENDS; Renewable Seat Ring Type: WELDED; Flange Face Design: PLAIN ALL ENDS. 30 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.