The Valve,safety Relief, cataloged under National Stock Number 4820-00-959-7300, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Ashcroft Inc Dba Heise. Government technical data includes 28 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-959-7300 |
| Primary Part Number | 3/4-2478D-XDA |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Ashcroft Inc Dba Heise |
| Status | ACTIVE |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Bonnet Attachment Method | THREADED |
| Thread Direction | RIGHT-HAND FIRST END |
| Connection Style | PLAIN (PIPE) FIRST END |
| Thread Series Designator | NPT FIRST END |
| Material | COPPER ALLOY BODY |
| Bonnet Type | INSIDE SPRING |
| Thread Quantity Per Inch | 14 SECOND END |
| Thread Quantity Per Inch | 11-1/2 FIRST END |
| Valve Discharge Flow Rate | 10.7 GALLONS PER MINUTE |
| Features Provided | VALVE STEM LOCK SHIELD |
| Maximum Operating Temp | 406.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Thread Direction | RIGHT-HAND SECOND END |
| Material | COPPER ALLOY SEAT |
| Nominal Thread Size | 1.000 INCHES FIRST END IN |
| Operating Pressure | 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Opening Pressure Setting | 30.0 POUNDS PER SQUARE INCH LBS |
| Thread Series Designator | NPT SECOND END |
| Media for Which Designed | WATER, FRESH SINGLE RESPONSE |
| Material | COPPER ALLOY FLOW CONTROL DEVICE |
| Material | STEEL STEM |
| Disk Loading Method | SPRING |
| Connection Type | THREADED INTERNAL PIPE SECOND END |
| Style Designator | ANGLE |
| Flow Control Device | DISK |
| Valve Operation Method | AUTOMATIC OR MANUAL |
| Nominal Thread Size | 0.750 INCHES SECOND END IN |
| Connection Style | PLAIN,OPTIONAL END(PIPE) SECOND END |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 3/4-2478D-XDA PRIMARY | Ashcroft Inc Dba Heise (USA) |
| 2478D OPEN LIFTING ARM | Ashcroft Inc Dba Heise (USA) |
| 1479 | Ashcroft Inc Dba Heise (USA) |
NSN 4820-00-959-7300 is a Valve,safety Relief, manufactured by Ashcroft Inc Dba Heise, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-959-7300 has 3 cross-referenced part numbers: 3/4-2478D-XDA (Ashcroft Inc Dba Heise), 2478D OPEN LIFTING ARM (Ashcroft Inc Dba Heise), 1479 (Ashcroft Inc Dba Heise).
There are 12 known substitutes for 4820-00-959-7300: 5910-00-191-1836, 5940-00-250-7753, 4820-00-289-1807 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 3/4-2478D-XDA: Connection Type: THREADED EXTERNAL PIPE FIRST END; Bonnet Attachment Method: THREADED; Thread Direction: RIGHT-HAND FIRST END; Connection Style: PLAIN (PIPE) FIRST END. 28 total characteristics are documented in the Federal Logistics Information System.