The Valve,check, cataloged under National Stock Number 4820-00-953-1221, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Crane Co Div Valve Div. Government technical data includes 23 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-953-1221 |
| Primary Part Number | 159X-2IN |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Crane Co Div Valve Div |
| Status | ACTIVE |
| Material | STEEL CORROSION RESISTING SEAT |
| Maximum Operating Temp | 850.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Bolt Hole Quantity | 8 ALL ENDS |
| Flow Control Device | DISK |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Connection Type | FLANGE ALL ENDS |
| Media for Which Designed | STEAM SINGLE RESPONSE |
| Material | STEEL FLOW CONTROL DEVICE |
| Material Document and Classification | ASTMALB000 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Nominal Thickness | 0.875 INCHES ALL ENDS IN |
| Material | ALUMINUM ALLOY BODY |
| Raised Face Nominal Diameter | 3.625 INCHES ALL ENDS IN |
| Bolt Circle Nominal Diameter | 5.000 INCHES ALL ENDS IN |
| Flange Face Design | RAISED STRAIGHT ALL ENDS |
| Valve Operation Method | AUTOMATIC |
| Operating Pressure | 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Renewable Seat Ring Type | THREADED |
| Raised Face Nominal Height | 0.062 INCHES ALL ENDS IN |
| Style Designator | STRAIGHT THRU |
| Face to Face Distance | 10.500 INCHES IN |
| Nominal Outside Diameter | 6.500 INCHES ALL ENDS IN |
| Bolt Hole Nominal Diameter | 0.750 INCHES ALL ENDS IN |
| Mounting Position | HORIZONTAL |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4820-00-953-1221 is a Valve,check, manufactured by Crane Co Div Valve Div, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-953-1221 has 2 cross-referenced part numbers: 159X-2IN (Crane Co Div Valve Div), 159X (Crane Co Div Valve Div).
There is 1 known substitute for 4820-00-953-1221: 5340-00-467-0127. Verify interchangeability with system specifications before substitution.
Key specifications for 159X-2IN: Material: STEEL CORROSION RESISTING SEAT; Maximum Operating Temp: 850.0 FAHRENHEIT SINGLE RESPONSE DEGF; Bolt Hole Quantity: 8 ALL ENDS; Flow Control Device: DISK. 23 total characteristics are documented in the Federal Logistics Information System.