The Valve,safety Relief, cataloged under National Stock Number 4820-01-408-2665, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Anderson Greenwood Lp Dba Anderson Greenwood Crosby. Government technical data includes 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-408-2665 |
| Primary Part Number | 20197BS51SS |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| Status | ACTIVE |
| Material | STEEL CORROSION RESISTING BODY |
| Material Document and Classification | ASTM A582, TY 303 ASSN STD SINGLE MATERIAL RESPONSE SEAT |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Nominal Pipe Size Accommodated | 0.500 INCHES ALL ENDS IN |
| Material Document and Classification | ASTM A351 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Flow Control Device | DISK |
| Disk Loading Method | SPRING |
| Material | STEEL COMP 303 SEAT |
| Material Document and Classification | ASTM A582, TY 303 ASSN STD SINGLE MATERIAL RESPONSE STEM |
| Connection Type | UNTHREADED INTERNAL PIPE ALL ENDS |
| Valve Operation Method | AUTOMATIC OR MANUAL |
| Maximum Operating Temp | 165.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Adjustable Pressure Range | +1401.0 TO 1800.0 POUNDS PER SQUARE INCH LBS |
| Material | STEEL COMP 303 STEM |
| Connection Style | SOCKET ALL ENDS |
| Operating Pressure | 3450.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Furnished Items and Quantity | 2 TAILPIECE |
| Style Designator | ANGLE |
| Reference Number Differentiating Characteristics | QUALITY CONTROL IN ACCORDANCE WITH NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS |
| Criticality Code Justification | ZZZY |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 20197BS51SS | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| 20197BS51SS | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| 20197BS51SS | Anderson Greenwood and Co (USA) |
| 20197BS51SSL1 | Naval Inventory Control Point Mechanicsburg (USA) |
NSN 4820-01-408-2665 is a Valve,safety Relief, manufactured by Anderson Greenwood Lp Dba Anderson Greenwood Crosby, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-408-2665 has 4 cross-referenced part numbers: 20197BS51SS (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 20197BS51SS (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), 20197BS51SS (Anderson Greenwood and Co), 20197BS51SSL1 (Naval Inventory Control Point Mechanicsburg).
There is 1 known substitute for 4820-01-408-2665: 4820-01-136-2014. Verify interchangeability with system specifications before substitution.
Key specifications for 20197BS51SS: Material: STEEL CORROSION RESISTING BODY; Material Document and Classification: ASTM A582, TY 303 ASSN STD SINGLE MATERIAL RESPONSE SEAT; Material: STEEL CORROSION RESISTING FLOW CONTROL DEVICE; Nominal Pipe Size Accommodated: 0.500 INCHES ALL ENDS IN. 20 total characteristics are documented in the Federal Logistics Information System.