The Valve,safety Relief, cataloged under National Stock Number 4820-00-287-2969, 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 22 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 31 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4820-00-287-2969 |
| Primary Part Number | 1542DRL1-2 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Ashcroft Inc Dba Heise |
| Status | CANCELLED |
| Connection Style | PLAIN,OPTIONAL END(PIPE) SECOND END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Material | COPPER ALLOY FLOW CONTROL DEVICE |
| Maximum Operating Temp | 406.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Media for Which Designed | GAS, NATURAL SECOND RESPONSE |
| Adjustable Pressure Range | +31.0 TO 50.0 POUNDS PER SQUARE INCH LBS |
| Connection Type | THREADED INTERNAL PIPE SECOND END |
| Connection Style | PLAIN (PIPE) FIRST END |
| Features Provided | VALVE STEM LOCK SHIELD |
| Disk Loading Method | SPRING |
| Material | COPPER ALLOY BODY |
| Nominal Thread Size | 0.500 INCHES ALL ENDS IN |
| Media for Which Designed | AIR FIRST RESPONSE |
| Thread Series Designator | NPT ALL ENDS |
| Operating Pressure | 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Style Designator | ANGLE |
| Media for Which Designed | STEAM THIRD RESPONSE |
| Material | COPPER ALLOY SEAT |
| Flow Control Device | DISK |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Valve Operation Method | AUTOMATIC |
| Material | STEEL STEM |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 90G52 | Cooper Industries Inc Dba Cooper Tools (USA) |
| 11400PC73 | Cooper Industries Inc Dba Cooper Tools (USA) |
| 10400PC73 | Cooper Industries Industrial Machinery Div (USA) |
| 1542DRL1-2 PRIMARY | Ashcroft Inc Dba Heise (USA) |
| 10400PC73 | Cooper Industries Inc Dba Cooper Tools (USA) |
| 9700PC73 | Cooper Industries Inc Dba Cooper Tools (USA) |
| 1471-1-2 | Ashcroft Inc Dba Heise (USA) |
| 11402PC73 | Cooper Industries Industrial Machinery Div (USA) |
| 11409PC73 | Cooper Industries Industrial Machinery Div (USA) |
| 9909PC74 | Cooper Industries Industrial Machinery Div (USA) |
| 9900PC74 | Cooper Industries Industrial Machinery Div (USA) |
| 11400PC73 | Cooper Industries Industrial Machinery Div (USA) |
| 90G52 | Cooper Industries Industrial Machinery Div (USA) |
| 9900PC74 | Cooper Industries Inc Dba Cooper Tools (USA) |
| 10409PC73 | Cooper Industries Inc Dba Cooper Tools (USA) |
| 9902PC74 | Cooper Industries Inc Dba Cooper Tools (USA) |
| 10409PC73 | Cooper Industries Industrial Machinery Div (USA) |
| 9902PC74 | Cooper Industries Industrial Machinery Div (USA) |
| 1479-1/2IN MPT5 | Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse (USA) |
| 11402PC73 | Cooper Industries Inc Dba Cooper Tools (USA) |
NSN 4820-00-287-2969 is a Valve,safety Relief, manufactured by Ashcroft Inc Dba Heise, classified under FSC 4820 (No Item Name Available). Status: cancelled.
NSN 4820-00-287-2969 has 31 cross-referenced part numbers: 90G52 (Cooper Industries Inc Dba Cooper Tools), 11400PC73 (Cooper Industries Inc Dba Cooper Tools), 10400PC73 (Cooper Industries Industrial Machinery Div), 1542DRL1-2 (Ashcroft Inc Dba Heise), 10400PC73 (Cooper Industries Inc Dba Cooper Tools) and 26 more.
There are 7 known substitutes for 4820-00-287-2969: 4320-00-211-5079, 5331-00-248-3847, 6625-00-337-4967 and 4 more. Verify interchangeability with system specifications before substitution.
Key specifications for 1542DRL1-2: Connection Style: PLAIN,OPTIONAL END(PIPE) SECOND END; Connection Type: THREADED EXTERNAL PIPE FIRST END; Material: COPPER ALLOY FLOW CONTROL DEVICE; Maximum Operating Temp: 406.0 FAHRENHEIT SINGLE RESPONSE DEGF. 22 total characteristics are documented in the Federal Logistics Information System.
NSN 4820-00-287-2969 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.