The Valve,check, cataloged under National Stock Number 4820-00-827-7902, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Walworth-Aloyco. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, 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 | 4820-00-827-7902 |
| Primary Part Number | 554-1 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Walworth-Aloyco |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Material | STEEL COMP 304 OVERALL |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY MATERIAL IN ACCORDANCE WITH ACTIVITY HXQUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS |
| Style Designator | STRAIGHT THRU |
| Connection Style | SOCKET (PIPE) FIRST END |
| Mounting Position | HORIZONTAL |
| Disk Loading Method | WEIGHT |
| Nominal Pipe Size Accommodated | 1.000 INCHES FIRST END IN |
| Connection Type | UNTHREADED INTERNAL TUBE FIRST END |
| Valve Operation Method | AUTOMATIC |
| Flow Control Device | DISK |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 554-1 | Walworth-Aloyco (USA) |
| D9949-3PC554-1 | Walworth-Aloyco (USA) |
NSN 4820-00-827-7902 is a Valve,check, manufactured by Walworth-Aloyco, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-827-7902 has 2 cross-referenced part numbers: 554-1 (Walworth-Aloyco), D9949-3PC554-1 (Walworth-Aloyco).
There are 6 known substitutes for 4820-00-827-7902: 6105-00-126-2620, 5940-00-820-5982, 1680-00-942-1501 and 3 more. Verify interchangeability with system specifications before substitution.
Key specifications for 554-1: Criticality Code Justification: ZZZY; Operating Pressure: 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Material: STEEL COMP 304 OVERALL; Reference Number Differentiating Characteristics: AS DIFFERENTIATED BY MATERIAL IN ACCORDANCE WITH ACTIVITY HXQUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS. 12 total characteristics are documented in the Federal Logistics Information System.