The Valve,safety Relief, cataloged under National Stock Number 4820-00-900-3800, 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 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4820-00-900-3800 |
| Primary Part Number | 1543D |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Ashcroft Inc Dba Heise |
| Status | CANCELLED |
| Thread Series Designator | NPT ALL ENDS |
| Style Designator | ANGLE |
| Opening Pressure Setting | 125.0 POUNDS PER SQUARE INCH LBS |
| Material | IRON CAST BODY |
| Flow Control Device | DISK |
| Valve Operation Method | AUTOMATIC |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Bonnet Attachment Method | INTEGRAL |
| Disk Loading Method | SPRING |
| Nominal Thread Size | 0.500 INCHES SECOND END IN |
| Connection Style | PLAIN (PIPE) FIRST END |
| Connection Style | PLAIN,OPTIONAL END(PIPE) SECOND END |
| Connection Type | THREADED INTERNAL PIPE SECOND END |
| Nominal Thread Size | 0.750 INCHES FIRST END IN |
| Furnished Items and Quantity | 1 LEVER |
| Bonnet Type | INSIDE SPRING |
| Operating Pressure | 250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 1543-1-2INRNG12010130PSI | Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse (USA) |
| 1543-1-2INRNG120TO130PSI | Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse (USA) |
| 1543D | Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse (USA) |
| 18217 | Clayton Manufacturing Company (USA) |
| 1543D PRIMARY | Ashcroft Inc Dba Heise (USA) |
NSN 4820-00-900-3800 is a Valve,safety Relief, manufactured by Ashcroft Inc Dba Heise, classified under FSC 4820 (No Item Name Available). Status: cancelled.
NSN 4820-00-900-3800 has 5 cross-referenced part numbers: 1543-1-2INRNG12010130PSI (Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse), 1543-1-2INRNG120TO130PSI (Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse), 1543D (Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse), 18217 (Clayton Manufacturing Company), 1543D (Ashcroft Inc Dba Heise).
There are 4 known substitutes for 4820-00-900-3800: 4820-00-269-7591, 5330-00-700-8536, 2995-00-909-9939 and 1 more. Verify interchangeability with system specifications before substitution.
Key specifications for 1543D: Thread Series Designator: NPT ALL ENDS; Style Designator: ANGLE; Opening Pressure Setting: 125.0 POUNDS PER SQUARE INCH LBS; Material: IRON CAST BODY. 19 total characteristics are documented in the Federal Logistics Information System.
NSN 4820-00-900-3800 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.