The Valve,safety Relief, cataloged under National Stock Number 4820-00-800-6156, 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 30 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-800-6156 |
| Primary Part Number | 1851 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Ashcroft Inc Dba Heise |
| Status | ACTIVE |
| Material | COPPER ALLOY BODY |
| Nominal Pipe Size Accommodated | 0.500 INCHES SECOND END IN |
| Material | COPPER ALLOY SEAT |
| Thread Quantity Per Inch | 14 FIRST END |
| Thread Direction | RIGHT-HAND FIRST END |
| Connection Type | THREADED INTERNAL PIPE FIRST END |
| Thread Series Designator | NPT FIRST END |
| Nominal Pipe Size Accommodated | 0.750 INCHES FIRST END IN |
| Opening Pressure Setting | 10.0 POUNDS PER SQUARE INCH LBS |
| Features Provided | VALVE STEM LOCK SHIELD AND BONNET PACKING AND PRESSURE TIGHT OUTLET SIDE |
| Bonnet Attachment Method | THREADED |
| Operating Pressure | 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS |
| Operating Pressure | 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS |
| Valve Discharge Flow Rate | 15.0 CUBIC FEET PER MINUTE |
| Thread Quantity Per Inch | 14 SECOND END |
| Thread Series Designator | NPT SECOND END |
| Nominal Thread Size | 0.500 INCHES SECOND END IN |
| Thread Direction | RIGHT-HAND SECOND END |
| Nominal Thread Size | 0.750 INCHES FIRST END IN |
| Maximum Operating Temp | 170.0 FAHRENHEIT SECOND RESPONSE DEGF |
| Connection Type | THREADED EXTERNAL PIPE SECOND END |
| Material | STEEL STEM |
| Valve Operation Method | AUTOMATIC OR MANUAL |
| Bonnet Type | INSIDE SPRING |
| Flow Control Device | POPPET |
| Maximum Operating Temp | 170.0 FAHRENHEIT FIRST RESPONSE DEGF |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY VALVE SIZE ANDSET PRESSURE |
| Connection Style | PLAIN (PIPE) SECOND END |
| Disk Loading Method | SPRING |
| Style Designator | ANGLE |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 1851 | Ashcroft Inc Dba Heise (USA) |
NSN 4820-00-800-6156 is a Valve,safety Relief, manufactured by Ashcroft Inc Dba Heise, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-800-6156 has 1 cross-referenced part number: 1851 (Ashcroft Inc Dba Heise).
There are 12 known substitutes for 4820-00-800-6156: 4820-00-036-1730, 3110-00-117-0571, 5325-00-148-5509 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 1851: Material: COPPER ALLOY BODY; Nominal Pipe Size Accommodated: 0.500 INCHES SECOND END IN; Material: COPPER ALLOY SEAT; Thread Quantity Per Inch: 14 FIRST END. 30 total characteristics are documented in the Federal Logistics Information System.