The Valve,check, cataloged under National Stock Number 4820-01-440-0849, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is William Powell Company, the Dba Powell Valve Div the Starflo Corporation. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-440-0849 |
| Primary Part Number | 1561 FE 6.00IN |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Flange Face Design | RAISED STRAIGHT ALL ENDS |
| Bolt Circle Nominal Diameter | 9.500 INCHES ALL ENDS IN |
| Mounting Position | HORIZONTAL |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Material Document and Classification | ASTM A-193 GR B7 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | ASTM A-217 GR CA15 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | ASTM A-519 ASSN STD SINGLE MATERIAL RESPONSE SEAT |
| Bolt Hole Nominal Diameter | 9.500 INCHES ALL ENDS IN |
| Valve Size | 6.000 INCHES IN |
| Nominal Outside Diameter | 11.000 INCHES ALL ENDS IN |
| Bolt Hole Quantity | 8 ALL ENDS |
| Face to Face Distance | 14.000 INCHES IN |
| Material | STEEL BODY |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Material | STEEL COMP 1015 OR STEEL COMP 1025 SEAT |
| Raised Face Nominal Diameter | 8.500 INCHES ALL ENDS IN |
| Valve Operation Method | AUTOMATIC |
| Raised Face Nominal Height | 0.625 INCHES ALL ENDS IN |
| Nominal Thickness | 1.562 INCHES ALL ENDS IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 1561 FE 6.00IN PRIMARY | William Powell Company, the Dba Powell Valve Div the Starflo Corporation (USA) |
| Reference | Meaning |
|---|---|
| 1561A-6.OOIN | C/1 Advisory reference — outside the item-of-supply concept William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
| 1561A FE 6.00IN | 5/9 Secondary reference William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
NSN 4820-01-440-0849 is a Valve,check, manufactured by William Powell Company, the Dba Powell Valve Div the Starflo Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-440-0849 has 1 manufacturer part number on file: 1561 FE 6.00IN (William Powell Company, the Dba Powell Valve Div the Starflo Corporation).
Key specifications for 1561 FE 6.00IN: Flow Control Device: DISK; Flange Shape: ROUND WITH HOLES ALL ENDS; Flange Face Design: RAISED STRAIGHT ALL ENDS; Bolt Circle Nominal Diameter: 9.500 INCHES ALL ENDS IN. 22 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.