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| Item Name | Valve Safety Relief |
| Federal Supply Group (FSG) | Valves |
| Federal Supply Class (FSC) | 4820 Valves Nonpowered |
| National Item Identification Number (NIIN) | 00-401-3974 (004013974) |
| NCB Code | USA (00) |
| Manufacturer | Ashcroft Inc, Dresser Industries Inc |
| MRC | Criteria | Characteristic |
|---|---|---|
| ADQU | FLOW CONTROL DEVICE | DISK |
| ADSR | BONNET TYPE | PACKING RETAINING |
| ADSY | VALVE DISCHARGE FLOW RATE | 58300.0 POUNDS PER HOUR |
| ADZH | RENEWABLE SEAT RING TYPE | THREADED |
| AECS | BOLT HOLE QUANTITY | 8 1ST END |
| AECS | BOLT HOLE QUANTITY | 9 2ND END |
| AQLR | VALVE OPERATION METHOD | AUTOMATIC |
| ARKN | FLANGE SHAPE | ROUND WITH HOLES 1ST END |
| ARKN | FLANGE SHAPE | ROUND WITH HOLES 2ND END |
| AWLS | CONNECTION TYPE | FLANGE 1ST END |
| AWLS | CONNECTION TYPE | FLANGE 2ND END |
| CBBL | FEATURES PROVIDED | PRESSURE TIGHT OUTLET SIDE |
| CWCD | NOMINAL OUTSIDE DIAMETER | 7.500 INCHES 1ST END |
| CWCD | NOMINAL OUTSIDE DIAMETER | 8.688 INCHES 2ND END |
| CWCK | NOMINAL THICKNESS | 0.875 INCHES 2ND END |
| CWCK | NOMINAL THICKNESS | 1.438 INCHES 1ST END |
| CWCQ | BOLT HOLE NOMINAL DIAMETER | 0.812 INCHES 1ST END |
| CWCQ | BOLT HOLE NOMINAL DIAMETER | 0.812 INCHES 2ND END |
| CWCT | BOLT CIRCLE NOMINAL DIAMETER | 5.875 INCHES 1ST END |
| CWCT | BOLT CIRCLE NOMINAL DIAMETER | 7.125 INCHES 2ND END |
| CWDF | FLANGE FACE DESIGN | PLAIN 2ND END |
| CWDF | FLANGE FACE DESIGN | RAISED STRAIGHT 1ST END |
| CWDH | RAISED FACE NOMINAL HEIGHT | 0.250 INCHES 1ST END |
| CWDL | RAISED FACE NOMINAL DIAMETER | 5.000 INCHES 1ST END |
| MATT | MATERIAL | STEEL BODY |
| MATT | MATERIAL | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| MATT | MATERIAL | STEEL CORROSION RESISTING SEAT |
| MATT | MATERIAL | STEEL CORROSION RESISTING STEM |
| STYL | STYLE DESIGNATOR | ANGLE |
| ZZZY | REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS | AS DIFFERENTIATED BY THE VALVE DISCHARGE FLOW RATE REQUIREMENTAND THE RAISED FACE DIAMETER REQUIREMENT |
| Relevant Components for NSN - 4820-00-401-3974, 4820004013974 | ||||
| 4810-12-356-6647 (4810123566647) | 4820-01-197-5068 (4820011975068) | 4820-01-506-5906 (4820015065906) | 4820-00-140-1494 (4820001401494) | |
| 4810-99-420-7033 (4810994207033) | 4820-01-697-3584 (4820016973584) | 4820-01-486-9432 (4820014869432) | 4820-00-145-6265 (4820001456265) | |
| 4820-00-427-9526 (4820004279526) | 4820-01-500-4813 (4820015004813) | 4820-01-434-3106 (4820014343106) | 4810-01-688-9894 (4810016889894) | |
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