The Valve,butterfly, cataloged under National Stock Number 4820-01-323-7135, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-323-7135 |
| Item Name | Valve,butterfly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flange Shape | ROUND ALL ENDS |
| Flange Face Design | PLAIN ALL ENDS |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Valve Size | 2.500 INCHES IN |
| Nominal Outside Diameter | 4.880 INCHES ALL ENDS IN |
| Mounting Facility | WAFER |
| Face to Face Distance | 2.750 INCHES IN |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Material | STEEL CORROSION RESISTING SEAT |
| Material | STEEL COMP 316 STEM |
| Material | ALUMINUM ALLOY BODY |
| Material | RUBBER FLUOROCARBON CLASS FPM PACKING |
| Valve Operation Method | MANUAL |
| Nominal Thickness | 1.750 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 |
| Reference | Meaning |
|---|---|
| 59201A495 | 5/2 Secondary reference U.S. Government activity |
| 920D190 | 5/9 Secondary reference U.S. Government activity |
| M2040-222B-1AM 2 1/2IN | C/1 Advisory reference — outside the item-of-supply concept Dover Resources, Inc. Div Norriseal |
| 920D190 | C/1 Advisory reference — outside the item-of-supply concept Dover Resources, Inc. Div Norriseal |
| M2040-222B-1AM 2 1/2IN | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-323-7135 is a Valve,butterfly, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-323-7135: Flange Shape: ROUND ALL ENDS; Flange Face Design: PLAIN ALL ENDS; Connection Type: FLANGE ALL ENDS; Style Designator: STRAIGHT THRU FLANGED ENDS. 15 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.