NSN 4820-00-207-8821 540 1-2, 54012, 00-207-8821
Product Details | PRESSURE AND TEMPERATURE RELIEF VALVE
4820-00-207-8821 A valve designed to release under excessive pressure and/or excessive temperature by opening at a predetermined pressure and/or temperature. Thermostatically operated valves close when the pressure is relieved or the temperature is reduced. Fusible plug valves require replacement of the plug. See also VALVE, SAFETY RELIEF and VALVE, REGULATING. TEMPERATURE.
Part Alternates: 540 1-2, 54012, 4820-00-207-8821, 00-207-8821, 4820002078821, 002078821
| Supply Group (FSG) | NSN Assign. | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 48 | 13 APR 1973 | 00-207-8821 | 16996 ( VALVE, RELIEF, PRESSURE AND TEMPERATURE ) |
Drawings & Photos | NSN 4820-00-207-8821
Cross Reference | NSN 4820-00-207-8821
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 540 1-2 | 79227 | WATTS REGULATOR CO |
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Technical Data | NSN 4820-00-207-8821
| Characteristic | Specifications |
|---|---|
| BODY STYLE | A7 ANGLE |
| BODY MATERIAL | BRASS |
| SEAT MATERIAL | BRASS |
| FLOW CONTROL DEVICE | DISK, LIFT |
| FLOW CONTROL DEVICE MATERIAL | STEEL, CORROSION RESISTING |
| END CONNECTION QUANTITY | 2 |
| FIRST END CONNECTION TYPE | THREADED INTERNAL PIPE |
| FIRST END STYLE DESIGNATOR | G12 OPTIONAL END |
| FIRST END NOMINAL PIPE SIZE ACCOMMODATED | 0.500 INCHES |
| FIRST END THREAD DIRECTION | RIGHT-HAND |
| SECOND END RELATIONSHIP WITH FIRST END | NOT IDENTICAL |
| SECOND END CONNECTION TYPE | THREADED EXTERNAL PIPE |
| SECOND END STYLE DESIGNATOR | J6 PLAIN |
| SECOND END NOMINAL PIPE SIZE ACCOMMODATED | 0.500 INCHES |
| SECOND END THREAD DIRECTION | RIGHT-HAND |
| TEMP ADJUSTABILITY | NOT ADJUSTABLE |
| MEDIA FOR WHICH DESIGNED | WATER, FRESH |
| TEMP RATING | 210.0 DEG FAHRENHEIT |
| VALVE DISCHARGE FLOW RATE | NOT RATED |
| BULB LENGTH | 4.000 INCHES NOMINAL |
| BULB DIAMETER | 0.812 INCHES NOMINAL |
| TEMP CONTROL DEVICE TYPE | FUSIBLE |
| OPENING PRESSURE SETTING | 175.0 POUNDS PER SQUARE INCH |
| ADJUSTABLE PRESSURE RANGE | 75.0 TO 175.0 POUNDS PER SQUARE INCH |
| SPECIAL FEATURES | TEMPERATURE WATER RATING AT 50000-BTU/HR |
Restrictions/Controls & Freight Information | NSN 4820-00-207-8821
| Category | Code | Description |
|---|---|---|
| Hazardous Material Indicator Code | N | There is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials |
| Demilitarization Code: | A | Non-Munitions List Item/ Non-Strategic List Item - Demilitarization not required. |
| Precious Metals Indicator Code: | U | Precious metal type is unknown |
| Criticality Code: | X | The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. |
| Category | Code | Description |
|---|---|---|
| No Freight Information | ||