| Item Name | Valve Safety Relief |
| Federal Supply Group (FSG) | Valves |
| Federal Supply Class (FSC) | 4820 Valves Nonpowered |
| National Item Identification Number (NIIN) | 01-273-0493 (012730493) |
| NCB Code | USA (01) |
| Manufacturer | Nacco Materials Handling Group Inc, Rego Co |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAJF | THREAD DIRECTION | RIGHT-HAND ALL ENDS |
| ADQU | FLOW CONTROL DEVICE | DISK |
| AEHZ | MAXIMUM OPERATING TEMP | 165.0 DEG FAHRENHEIT SINGLE RESPONSE |
| AHNC | CONNECTION STYLE | PLAIN (PIPE) 1ST END |
| AHNC | CONNECTION STYLE | PLAIN,OPTIONAL END(PIPE) 2ND END |
| AQLR | VALVE OPERATION METHOD | AUTOMATIC |
| AWLS | CONNECTION TYPE | THREADED EXTERNAL PIPE 1ST END |
| AWLS | CONNECTION TYPE | THREADED INTERNAL PIPE 2ND END |
| CQJX | NOMINAL THREAD SIZE | 0.250 INCHES ALL ENDS |
| CSDC | OPENING PRESSURE SETTING | 250.0 POUNDS PER SQUARE INCH |
| FEAT | SPECIAL FEATURES | VALVE SIZE IS 0.250 IN. |
| MATT | MATERIAL | COPPER ALLOY BODY |
| MEDA | MEDIA FOR WHICH DESIGNED | AIR 1ST RESPONSE |
| MEDA | MEDIA FOR WHICH DESIGNED | HYDROGEN 2ND RESPONSE |
| MEDA | MEDIA FOR WHICH DESIGNED | NITROGEN,GASEOUS 3RD RESPONSE |
| MEDA | MEDIA FOR WHICH DESIGNED | OXYGEN,GASEOUS 4TH RESPONSE |
| STYL | STYLE DESIGNATOR | STRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY. |
| THSD | THREAD SERIES DESIGNATOR | NPT ALL ENDS |
| Relevant Components for NSN - 4820-01-273-0493, 4820012730493 | ||||
| 4820-00-405-2314 (4820004052314) | 4820-01-644-7717 (4820016447717) | 4820-00-138-5801 (4820001385801) | 4820-01-478-3615 (4820014783615) | |
| 4810-01-231-9665 (4810012319665) | 4810-01-463-1795 (4810014631795) | 4820-01-270-4213 (4820012704213) | 4820-01-482-5390 (4820014825390) | |
| 4810-01-574-6488 (4810015746488) | 4820-01-375-3688 (4820013753688) | 4810-01-486-6370 (4810014866370) | 4820-01-562-8058 (4820015628058) | |
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