The Valve,safety Relief, cataloged under National Stock Number 4820-00-287-4087, 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 23 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 4 manufacturers, 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 | 4820-00-287-4087 |
| Primary Part Number | 1664SIZE1-860PSI |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Ashcroft Inc Dba Heise |
| Status | ACTIVE |
| Material | COPPER ALLOY STEM |
| Thread Direction | RIGHT-HAND FIRST END |
| Bonnet Attachment Method | THREADED |
| Connection Style | PLAIN (PIPE) FIRST END |
| Flow Control Device | DISK |
| Features Provided | VALVE STEM LOCK SHIELD |
| Material | COPPER ALLOY SEAT |
| Disk Loading Method | SPRING |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Valve Operation Method | AUTOMATIC OR MANUAL |
| Valve Discharge Flow Rate | 48.0 CUBIC FEET PER MINUTE |
| Nominal Pipe Size Accommodated | 0.125 INCHES FIRST END IN |
| Thread Series Designator | NPT FIRST END |
| Nominal Thread Size | 0.125 INCHES FIRST END IN |
| Operating Pressure | 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Media for Which Designed | AIR FIRST RESPONSE |
| Material | COPPER ALLOY BODY |
| Opening Pressure Setting | 60.0 POUNDS PER SQUARE INCH LBS |
| Style Designator | ANGLE |
| Material | PLASTIC POLYAMIDE NYLON FLOW CONTROL DEVICE |
| Media for Which Designed | GAS, INERT SECOND RESPONSE |
| Bonnet Type | INSIDE SPRING |
| Maximum Operating Temp | 250.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| VAL920 | Worthington Compressors Inc Air Power and Construction Equip Div (USA) |
| VAL920 | Dresser-Rand Co Worthington Compressor Opn a Joint Venture (USA) |
| 1664SIZE1-860PSI PRIMARY | Ashcroft Inc Dba Heise (USA) |
| 1664 | Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse (USA) |
| 1664 PRIMARY | Ashcroft Inc Dba Heise (USA) |
NSN 4820-00-287-4087 is a Valve,safety Relief, manufactured by Ashcroft Inc Dba Heise, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-287-4087 has 5 cross-referenced part numbers: VAL920 (Worthington Compressors Inc Air Power and Construction Equip Div), VAL920 (Dresser-Rand Co Worthington Compressor Opn a Joint Venture), 1664SIZE1-860PSI (Ashcroft Inc Dba Heise), 1664 (Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse), 1664 (Ashcroft Inc Dba Heise).
There are 11 known substitutes for 4820-00-287-4087: 6115-00-235-8679, 5965-00-338-4259, 5985-00-407-5314 and 8 more. Verify interchangeability with system specifications before substitution.
Key specifications for 1664SIZE1-860PSI: Material: COPPER ALLOY STEM; Thread Direction: RIGHT-HAND FIRST END; Bonnet Attachment Method: THREADED; Connection Style: PLAIN (PIPE) FIRST END. 24 total characteristics are documented in the Federal Logistics Information System.