The Valve,safety Relief, cataloged under National Stock Number 4820-00-837-3144, 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 27 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-837-3144 |
| Primary Part Number | 1535-2 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Ashcroft Inc Dba Heise |
| Status | ACTIVE |
| Material | COPPER ALLOY FLOW CONTROL DEVICE |
| Style Designator | ANGLE |
| Operating Pressure | 4000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS |
| Operating Pressure | 4000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS |
| Flow Control Device | POPPET |
| Bonnet Attachment Method | THREADED |
| Bonnet Type | INSIDE SPRING |
| Valve Operation Method | AUTOMATIC |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Maximum Operating Temp | 200.0 FAHRENHEIT FIRST RESPONSE DEGF |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Thread Quantity Per Inch | 11-1/2 ALL ENDS |
| Material | COPPER ALLOY SEAT |
| Connection Style | PLAIN,OPTIONAL END(PIPE) ALL ENDS |
| Valve Discharge Flow Rate | 398.0 GALLONS PER MINUTE |
| Nominal Pipe Size Accommodated | 1.500 INCHES ALL ENDS IN |
| Adjustable Pressure Range | +801.0 TO 2000.0 POUNDS PER SQUARE INCH LBS |
| Material | STEEL STEM |
| Material | COPPER ALLOY BODY |
| Maximum Operating Temp | 200.0 FAHRENHEIT SECOND RESPONSE DEGF |
| Disk Loading Method | SPRING |
| Thread Series Designator | NPT ALL ENDS |
| Media for Which Designed | OIL FIRST RESPONSE |
| Features Provided | BONNET PACKING AND PRESSURE TIGHT OUTLET SIDE |
| Nominal Thread Size | 1.500 INCHES ALL ENDS IN |
| Media for Which Designed | WATER, FRESH SECOND RESPONSE |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY SIZE OF VALVE |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 1535-2 | Ashcroft Inc Dba Heise (USA) |
NSN 4820-00-837-3144 is a Valve,safety Relief, manufactured by Ashcroft Inc Dba Heise, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-837-3144 has 1 cross-referenced part number: 1535-2 (Ashcroft Inc Dba Heise).
There are 11 known substitutes for 4820-00-837-3144: 3110-00-142-4335, 5310-00-185-6426, 4210-00-496-6713 and 8 more. Verify interchangeability with system specifications before substitution.
Key specifications for 1535-2: Material: COPPER ALLOY FLOW CONTROL DEVICE; Style Designator: ANGLE; Operating Pressure: 4000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS; Operating Pressure: 4000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS. 27 total characteristics are documented in the Federal Logistics Information System.