The Valve,check, cataloged under National Stock Number 4820-01-423-2021, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Motorola Semiconductor Products Division. Government technical data includes 16 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-423-2021 |
| Primary Part Number | 29-034 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Motorola Semiconductor Products Division |
| Status | ACTIVE |
| Media for Which Designed | STEAM FIRST RESPONSE |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Connection Type | THREADED EXTERNAL PIPE ALL ENDS |
| Valve Operation Method | AUTOMATIC |
| Connection Style | PLAIN (PIPE) ALL ENDS |
| Material | COPPER ALLOY BODY |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS |
| Thread Series Designator | NPT ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Material | COPPER ALLOY FLOW CONTROL DEVICE |
| Media for Which Designed | WATER-OIL-GAS SECOND RESPONSE |
| Operating Pressure | 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS |
| Nominal Thread Size | 0.750 INCHES ALL ENDS IN |
| Flow Control Device | DISK |
| Furnished Items and Quantity | 1 CAP |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4820-01-423-2021 is a Valve,check, manufactured by Motorola Semiconductor Products Division, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-423-2021 has 2 cross-referenced part numbers: 29034 (Kitz Valve International Corporation), 29-034 (Motorola Semiconductor Products Division).
There are 4 known substitutes for 4820-01-423-2021: 5310-00-010-3347, 5945-00-235-7565, 5961-01-393-4426 and 1 more. Verify interchangeability with system specifications before substitution.
Key specifications for 29-034: Media for Which Designed: STEAM FIRST RESPONSE; Mounting Position: HORIZONTAL OR VERTICAL; Thread Direction: RIGHT-HAND ALL ENDS; Connection Type: THREADED EXTERNAL PIPE ALL ENDS. 18 total characteristics are documented in the Federal Logistics Information System.