The Valve,safety Relief, cataloged under National Stock Number 4820-00-800-9731, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Kunkle Industries Inc Lonergan Valve Div. Government technical data includes 25 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. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4820-00-800-9731 |
| Primary Part Number | T3-4 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Kunkle Industries Inc Lonergan Valve Div |
| Status | CANCELLED |
| Operating Pressure | 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Nominal Pipe Size Accommodated | 0.750 INCHES FIRST END IN |
| Bonnet Attachment Method | THREADED |
| Nominal Thread Size | 0.750 INCHES SECOND END IN |
| Disk Loading Method | SPRING |
| Valve Discharge Flow Rate | 21.8 GALLONS PER MINUTE |
| Thread Direction | RIGHT-HAND SECOND END |
| Flow Control Device | DISK |
| Thread Quantity Per Inch | 14 SECOND END |
| Media for Which Designed | LIQUID, INGESTED SINGLE RESPONSE |
| Maximum Operating Temp | 406.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Nominal Pipe Size Accommodated | 0.750 INCHES SECOND END IN |
| Connection Type | THREADED INTERNAL PIPE FIRST END |
| Valve Operation Method | AUTOMATIC |
| Opening Pressure Setting | 75.0 POUNDS PER SQUARE INCH LBS |
| Connection Style | PLAIN (PIPE) SECOND END |
| Thread Series Designator | NPT FIRST END |
| Nominal Thread Size | 0.750 INCHES FIRST END IN |
| Bonnet Type | INSIDE SPRING |
| Connection Type | THREADED EXTERNAL PIPE SECOND END |
| Thread Series Designator | NPT SECOND END |
| Connection Style | PLAIN,OPTIONAL END(PIPE) FIRST END |
| Material | COPPER ALLOY OVERALL |
| Style Designator | ANGLE |
| Thread Direction | RIGHT-HAND FIRST END |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| T3-4 | Kunkle Industries Inc Lonergan Valve Div (USA) |
NSN 4820-00-800-9731 is a Valve,safety Relief, manufactured by Kunkle Industries Inc Lonergan Valve Div, classified under FSC 4820 (No Item Name Available). Status: cancelled.
NSN 4820-00-800-9731 has 1 cross-referenced part number: T3-4 (Kunkle Industries Inc Lonergan Valve Div).
There are 10 known substitutes for 4820-00-800-9731: 3110-00-156-1487, 5940-00-197-9755, 5120-00-243-7338 and 7 more. Verify interchangeability with system specifications before substitution.
Key specifications for T3-4: Operating Pressure: 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Nominal Pipe Size Accommodated: 0.750 INCHES FIRST END IN; Bonnet Attachment Method: THREADED; Nominal Thread Size: 0.750 INCHES SECOND END IN. 25 total characteristics are documented in the Federal Logistics Information System.
NSN 4820-00-800-9731 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.