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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) | 00-252-4830 (002524830) |
| NCB Code | USA (00) |
| Manufacturer | Dresser Industries Inc, Ashcroft Inc |
| MRC | Criteria | Characteristic |
|---|---|---|
| ADQU | FLOW CONTROL DEVICE | DISK |
| ADSR | BONNET TYPE | EXPOSED SPRING |
| ADST | BONNET ATTACHMENT METHOD | BOLTED |
| ADSU | DISK LOADING METHOD | SPRING |
| ADSY | VALVE DISCHARGE FLOW RATE | 59900.0 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 OR MANUAL |
| 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 |
| CQCY | ADJUSTABLE PRESSURE RANGE | 1246.0 TO 1379.0 POUNDS PER SQUARE INCH |
| CSDC | OPENING PRESSURE SETTING | 1365.0 POUNDS PER SQUARE INCH |
| CWCD | NOMINAL OUTSIDE DIAMETER | 9.250 INCHES 2ND END |
| CWCD | NOMINAL OUTSIDE DIAMETER | 9.625 INCHES 1ST END |
| CWCQ | BOLT HOLE NOMINAL DIAMETER | 0.812 INCHES 2ND END |
| CWCQ | BOLT HOLE NOMINAL DIAMETER | 1.062 INCHES 1ST END |
| CWCT | BOLT CIRCLE NOMINAL DIAMETER | 7.500 INCHES 1ST END |
| CWCT | BOLT CIRCLE NOMINAL DIAMETER | 7.688 INCHES 2ND END |
| CWDF | FLANGE FACE DESIGN | PLAIN 1ST END |
| CWDF | FLANGE FACE DESIGN | PLAIN 2ND END |
| STYL | STYLE DESIGNATOR | ANGLE |
| ZZZY | REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS | AS DIFFERENTIATED BY THE VALVE DISCHARGE FLOW RATE REQUIREMENT |
| Relevant Components for NSN - 4820-00-252-4830, 4820002524830 | ||||
| 4810-01-693-0546 (4810016930546) | 4810-01-224-8636 (4810012248636) | 4810-00-181-8826 (4810001818826) | 4810-00-533-2538 (4810005332538) | |
| 4820-01-319-3454 (4820013193454) | 4820-01-154-9733 (4820011549733) | 4810-01-176-9496 (4810011769496) | 4820-01-278-5449 (4820012785449) | |
| 4810-01-152-7681 (4810011527681) | 4810-00-127-2787 (4810001272787) | 4820-00-557-7800 (4820005577800) | 4810-01-469-1460 (4810014691460) | |
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