The Valve,check, cataloged under National Stock Number 4820-01-141-8559, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is National Oilwell. Government technical data includes 18 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-141-8559 |
| Primary Part Number | NS-3205 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | National Oilwell |
| Status | ACTIVE |
| Mounting Position | HORIZONTAL |
| Material | NICKEL ALLOY OVERALL |
| Flange Face Design | PLAIN ALL ENDS |
| Nominal Thickness | 0.938 INCHES ALL ENDS IN |
| Bolt Hole Nominal Diameter | 0.688 INCHES ALL ENDS IN |
| Operating Pressure | 700.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Bolt Hole Quantity | 6 ALL ENDS |
| Connection Type | FLANGE ALL ENDS |
| Valve Size | 2.500 INCHES IN |
| Valve Operation Method | AUTOMATIC |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Face to Face Distance | 10.500 INCHES IN |
| Flow Control Device | DISK |
| Bolt Circle Nominal Diameter | 5.000 INCHES ALL ENDS IN |
| Media for Which Designed | WATER, FRESH SINGLE RESPONSE |
| Nominal Outside Diameter | 6.125 INCHES ALL ENDS IN |
| Disk Loading Method | WEIGHT |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| NS-3205 | National Oilwell (USA) |
| NS-3205-2 1/2IN | National Oilwell (USA) |
NSN 4820-01-141-8559 is a Valve,check, manufactured by National Oilwell, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-141-8559 has 2 cross-referenced part numbers: NS-3205 (National Oilwell), NS-3205-2 1/2IN (National Oilwell).
There are 4 known substitutes for 4820-01-141-8559: 4820-01-067-3915, 4820-01-121-0796, 4820-01-126-3737 and 1 more. Verify interchangeability with system specifications before substitution.
Key specifications for NS-3205: Mounting Position: HORIZONTAL; Material: NICKEL ALLOY OVERALL; Flange Face Design: PLAIN ALL ENDS; Nominal Thickness: 0.938 INCHES ALL ENDS IN. 18 total characteristics are documented in the Federal Logistics Information System.