The Valve,safety Relief, cataloged under National Stock Number 4820-00-289-2135, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 28 specifications, cited from the U.S. Government catalog. The record lists 10 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-289-2135 |
| Primary Part Number | CL144S4501-584406PC1 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Flow Control Device | DISKDISK |
| Flange Shape | ROUND WITH HOLES FIRST ENDROUND WITH HOLES FIRST END |
| Flange Face Design | PLAIN FIRST END |
| Connection Style | PLAIN,OPTIONAL END(PIPE) ALL ENDSPLAIN,OPTIONAL END(PIPE) ALL ENDS |
| Bolt Circle Nominal Diameter | 3.375 INCHES FIRST END IN |
| Connection Type | THREADED INTERNAL PIPE SECOND ENDTHREADED INTERNAL PIPE SECOND END |
| Connection Type | FLANGE FIRST ENDFLANGE FIRST END |
| Style Designator | ANGLE FLANGED ENDS |
| Bolt Hole Nominal Diameter | 0.562 INCHES FIRST END IN |
| Operating Pressure | 100.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Adjustable Pressure Range | +21.0 TO 30.0 POUNDS PER SQUARE INCH+21.0 TO 30.0 POUNDS PER SQUARE INCH LBS |
| Thread Direction | RIGHT-HAND SECOND ENDRIGHT-HAND SECOND END |
| Nominal Thread Size | 1.500 INCHES SECOND END1.500 INCHES SECOND END IN |
| Maximum Operating Temp | 406.0 FAHRENHEIT SINGLE RESPONSE406.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Second Connection Face to Centerline Distance | 2.125 INCHES IN |
| Nominal Outside Diameter | 4.500 INCHES FIRST END IN |
| Disk Loading Method | SPRINGSPRING |
| Bolt Hole Quantity | 4 FIRST END4 FIRST END |
| Media for Which Designed | STEAM SECOND RESPONSE |
| Media for Which Designed | STEAM SECOND RESPONSEAIR FIRST RESPONSE |
| First Connection Face to Centerline Distance | 3.406 INCHES IN |
| Material | STEEL CORROSION RESISTING STEM |
| Material | COPPER ALLOY FLOW CONTROL DEVICECOPPER ALLOY SEAT |
| Material | COPPER ALLOY SEATCOPPER ALLOY BODY |
| Material | STEEL CORROSION RESISTING STEMCOPPER ALLOY FLOW CONTROL DEVICE |
| Thread Series Designator | NPT SECOND END |
| Valve Operation Method | AUTOMATIC OR AUTOMATIC OR MANUALMANUAL |
| Nominal Thickness | 0.438 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 |
|---|---|
| CL144S4501-584406PC1 PRIMARY | Naval Sea Systems Command (USA) |
| HH2-CID882111568 PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| CB1S4501-6PC1 PRIMARY | Naval Sea Systems Command (USA) |
| CL55A45-95PC1 PRIMARY | Naval Sea Systems Command (USA) |
| CL55S55-243PC1 PRIMARY | Naval Sea Systems Command (USA) |
| CL144S5501-584423PC1 PRIMARY | Naval Sea Systems Command (USA) |
| CL55S55-261PC1 PRIMARY | Naval Sea Systems Command (USA) |
| CB1S5501-8PC1 PRIMARY | Naval Sea Systems Command (USA) |
| CV22S55-68PC1 PRIMARY | Naval Sea Systems Command (USA) |
| CL144S5501-584405PC1 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| CL55S45-95PC1 | 5/9 Secondary reference U.S. Government activity |
| CV22S55-68PC1 | 5/9 Secondary reference U.S. Government activity |
| CL144S4501-584406PC1 | 5/9 Secondary reference U.S. Government activity |
| CL55S55-261PC1 | 5/9 Secondary reference U.S. Government activity |
| CL144S5501-584405PC1 | 5/9 Secondary reference U.S. Government activity |
| CL55S55-243PC1 | 5/9 Secondary reference U.S. Government activity |
| CB1S5501-8PC1 | 5/9 Secondary reference U.S. Government activity |
| CL144S5501-584423PC1 | 5/9 Secondary reference U.S. Government activity |
| CB1S4501-6PC1 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-00-289-2135 is a Valve,safety Relief, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-289-2135 has 10 manufacturer part numbers on file: CL144S4501-584406PC1 (Naval Sea Systems Command), HH2-CID882111568 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), CB1S4501-6PC1 (Naval Sea Systems Command), CL55A45-95PC1 (Naval Sea Systems Command), CL55S55-243PC1 (Naval Sea Systems Command) and 5 more.
Key specifications for CL144S4501-584406PC1: Flow Control Device: DISKDISK; Flange Shape: ROUND WITH HOLES FIRST ENDROUND WITH HOLES FIRST END; Flange Face Design: PLAIN FIRST END; Connection Style: PLAIN,OPTIONAL END(PIPE) ALL ENDSPLAIN,OPTIONAL END(PIPE) ALL ENDS. 28 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.