The Valve,safety Relief, cataloged under National Stock Number 4820-01-235-5638, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-235-5638 |
| Primary Part Number | 1543H |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse |
| Status | ACTIVE |
| Material | COPPER ALLOY BODY |
| Opening Pressure Setting | 30.0 POUNDS PER SQUARE INCH LBS |
| Thread Series Designator | NPT SECOND END |
| Style Designator | ANGLE |
| Nominal Thread Size | 1.500 INCHES SECOND END IN |
| Nominal Thread Size | 2.000 INCHES FIRST END IN |
| Connection Type | THREADED INTERNAL PIPE FIRST END |
| Connection Style | PLAIN (PIPE) SECOND END |
| Flow Control Device | DISK |
| Thread Series Designator | NPT FIRST END |
| Connection Type | THREADED EXTERNAL PIPE SECOND END |
| Valve Operation Method | MANUAL |
| Connection Style | PLAIN,OPTIONAL END(PIPE) FIRST END |
| Thread Direction | RIGHT-HAND FIRST END |
| Thread Direction | RIGHT-HAND SECOND END |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4820-01-235-5638 is a Valve,safety Relief, manufactured by Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-235-5638 has 2 cross-referenced part numbers: 1543H (Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse), 28260 (Clayton Manufacturing Company).
There are 6 known substitutes for 4820-01-235-5638: 5330-00-251-8426, 5330-00-737-0840, 5930-01-122-4025 and 3 more. Verify interchangeability with system specifications before substitution.
Key specifications for 1543H: Material: COPPER ALLOY BODY; Opening Pressure Setting: 30.0 POUNDS PER SQUARE INCH LBS; Thread Series Designator: NPT SECOND END; Style Designator: ANGLE. 15 total characteristics are documented in the Federal Logistics Information System.