The Valve,safety Relief, cataloged under National Stock Number 4820-00-991-9927, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Chemetron Fire Systems. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 3 manufacturers, 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 | 4820-00-991-9927 |
| Primary Part Number | 1-061-0753 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Chemetron Fire Systems |
| Status | ACTIVE |
| Connection Style | PLAIN (PIPE) ALL ENDS |
| Flow Control Device | DISK |
| Operating Pressure | 450.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Style Designator | STRAIGHT THRU |
| Nominal Thread Size | 0.500 INCHES ALL ENDS IN |
| Media for Which Designed | HYDROGEN SECOND RESPONSE |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Maximum Operating Temp | 165.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Valve Operation Method | AUTOMATIC |
| Media for Which Designed | AIR FIRST RESPONSE |
| Connection Type | THREADED EXTERNAL PIPE ALL ENDS |
| Thread Series Designator | NPT ALL ENDS |
| Disk Loading Method | SPRING |
| Opening Pressure Setting | 117.0 POUNDS PER SQUARE INCH LBS |
| Material | COPPER ALLOY BODY |
| Media for Which Designed | OXYGEN, GASEOUS FOURTH RESPONSE |
| Media for Which Designed | NITROGEN, GASEOUS THIRD RESPONSE |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 10610753-P | Chemetron Fire Systems (USA) |
| 3129 | Rego Co a Marmon Group Co (USA) |
| 1-061-0753 | Badger Fire Protection Inc (USA) |
| 16113A | Badger Fire Protection Inc (USA) |
| 1-061-0753 | Badger Fire Protection Inc (USA) |
| 10610753-P | Badger Fire Protection Inc (USA) |
| 16113A | Badger Fire Protection Inc (USA) |
| 1-061-0753 PRIMARY | Chemetron Fire Systems (USA) |
NSN 4820-00-991-9927 is a Valve,safety Relief, manufactured by Chemetron Fire Systems, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-991-9927 has 8 cross-referenced part numbers: 10610753-P (Chemetron Fire Systems), 3129 (Rego Co a Marmon Group Co), 1-061-0753 (Badger Fire Protection Inc), 16113A (Badger Fire Protection Inc), 1-061-0753 (Badger Fire Protection Inc) and 3 more.
There are 12 known substitutes for 4820-00-991-9927: 5935-00-222-0815, 5930-00-267-6842, 5975-00-355-4056 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 1-061-0753: Connection Style: PLAIN (PIPE) ALL ENDS; Flow Control Device: DISK; Operating Pressure: 450.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Style Designator: STRAIGHT THRU. 17 total characteristics are documented in the Federal Logistics Information System.